Display device

Abstract

A display device is provided. The display device includes: a first substrate, in which a first emitting region and a non-emitting region are defined; a first light-emitting element located on the first substrate and overlapping the first emitting region; a thin-film encapsulation layer located on the first light-emitting element; a second substrate located on the thin-film encapsulation layer; a first color filter located on a surface of the second substrate facing the first substrate and overlapping the first emitting region; a first wavelength conversion pattern located on the first color filter and overlapping the first emitting region; and a first optical pattern located between the first color filter and the first wavelength conversion pattern and overlapping the first emitting region. The refractive index of the first optical pattern is less than that of the first wavelength conversion pattern, and the surface of the first optical pattern facing the first wavelength conversion pattern includes a curved surface recessed toward the second substrate.

Description

Technical Field

[0001] This disclosure relates to display devices. Background Technology

[0002] With the development of multimedia technology, the importance of display devices has gradually increased. Accordingly, various types of display devices, such as liquid crystal displays (LCDs) and organic light-emitting diode (OLEDs), have been developed.

[0003] In display devices, self-emissive display devices include self-emissive elements such as organic light-emitting elements (OLEDs). A self-emissive element may include two counter electrodes and an emissive layer between them. When using an organic light-emitting element as a self-emissive element, electrons and holes from the two electrodes recombine in the emissive layer to generate excitons, which then transition from an excited state to a ground state, thereby emitting light.

[0004] Self-emissive display devices are attracting attention as the next generation of display devices because they can meet high display quality requirements such as wide viewing angles, high brightness and high contrast, and fast response speeds. Furthermore, they can be manufactured with low power consumption, light weight and thinness because they do not require power supplies such as backlight units. Summary of the Invention

[0005] [Technical Issues]

[0006] As a method to allow each pixel of a display device to uniquely display a primary color, there are methods for arranging color conversion patterns or wavelength conversion patterns for each pixel in the light path from the light source to the viewer.

[0007] The present disclosure provides a display device with improved light efficiency.

[0008] However, the aspects of this disclosure are not limited to those set forth herein. These and other aspects of the disclosure will become more apparent to those skilled in the art upon reference to the detailed description of the disclosure given below.

[0009] [Technical Solution]

[0010] According to embodiments of the present disclosure, a display device is provided, comprising: a first substrate, wherein a first emitting region and a non-emitting region are defined in the first substrate; a first light-emitting element located on the first substrate and overlapping the first emitting region; a thin-film encapsulation layer located on the first light-emitting element; a second substrate located on the thin-film encapsulation layer; a first color filter located on a surface of the second substrate facing the first substrate and overlapping the first emitting region; a first wavelength conversion pattern located on the first color filter and overlapping the first emitting region; and a first optical pattern located between the first color filter and the first wavelength conversion pattern and overlapping the first emitting region, wherein the refractive index of the first optical pattern is less than the refractive index of the first wavelength conversion pattern, and the surface of the first optical pattern facing the first wavelength conversion pattern includes a curved surface recessed toward the second substrate.

[0011] In some embodiments, the refractive index of the first optical pattern may be greater than or equal to 1.1 and less than 1.4, and the refractive index of the first wavelength conversion pattern may be greater than or equal to 1.7 and less than 1.9.

[0012] In some embodiments, the display device may further include a dam pattern located on a surface of the second substrate and surrounding the first wavelength conversion pattern while overlapping with the non-emitting region, and the first optical pattern may be located in the space defined by the dam pattern.

[0013] In some embodiments, the height of the embankment pattern measured relative to one surface of the second base may be higher than the height of the first optical pattern measured relative to one surface of the second base.

[0014] In some embodiments, the first optical pattern may include a portion in which the height of the first optical pattern increases as the distance from the embankment pattern decreases.

[0015] In some embodiments, the first optical pattern may be in direct contact with the embankment pattern in the space defined by the embankment pattern.

[0016] In some embodiments, the display device may further include columnar spacers located on one surface of the embankment pattern facing the first base, and the columnar spacers may be made of the same material as the first optical pattern.

[0017] In some embodiments, the first optical pattern and columnar spacer may include resin and a plurality of particles dispersed in the resin and comprising inorganic material.

[0018] In some embodiments, the display device may further include a capping layer located on the first wavelength conversion pattern and the embankment pattern and covering the columnar spacers, and the portion of the capping layer overlapping the columnar spacers may contact the thin-film encapsulation layer.

[0019] In some embodiments, the display device may further include a filler located between the capping layer and the thin-film encapsulation layer, and the filler may contact the capping layer and the thin-film encapsulation layer.

[0020] In some embodiments, the first optical pattern may further include a plurality of convex patterns protruding from one surface of the first optical pattern into a first wavelength conversion pattern.

[0021] In some embodiments, the first opening exposing a portion of the first color filter may be further defined in the first optical pattern, and a portion of the first wavelength conversion pattern may be located in the first opening.

[0022] In some embodiments, the edge of the first emission region may completely surround the first opening in a plan view.

[0023] In some embodiments, the display device may further include a cover layer located between the first optical pattern and the first wavelength conversion pattern, and the cover layer may contact a portion of the first color filter exposed through the first opening.

[0024] In some embodiments, the first base may further include a second emitting region and a third emitting region. The display device may further include a second light-emitting element located on the first base and overlapping the second emitting region; a third light-emitting element located on the first base and overlapping the third emitting region; a second color filter located on one surface of the second base and overlapping the second emitting region; a second wavelength conversion pattern located on the second color filter and overlapping the second emitting region; a second optical pattern located between the second color filter and the second wavelength conversion pattern and overlapping the second emitting region; a third color filter located on one surface of the second base and overlapping the third emitting region; a light transmission pattern located on the third color filter and overlapping the third emitting region; and a third optical pattern located between the third color filter and the light transmission pattern and overlapping the third emitting region. The first optical pattern, the second optical pattern, and the third optical pattern may be made of the same material.

[0025] In some embodiments, in a plan view, the area of ​​the third optical pattern may be different from the area of ​​the first optical pattern and the area of ​​the second optical pattern.

[0026] In some embodiments, a first opening exposing a portion of a first color filter may be further defined in a first optical pattern, a second opening exposing a portion of a second color filter may be further defined in a second optical pattern, and a third opening exposing a portion of a third color filter may be further defined in a third optical pattern. In a plan view, the area of ​​the third opening may differ from the areas of the first and second openings.

[0027] According to another embodiment of this disclosure, a display device is provided, comprising: a first substrate, wherein a first emitting region and a non-emitting region are defined in the first substrate; a first light-emitting element located on the first substrate and overlapping the first emitting region; a thin-film encapsulation layer located on the first light-emitting element; a filler located on the thin-film encapsulation layer; a second substrate located on the filler; a first color filter located on a surface of the second substrate facing the first substrate and overlapping the first emitting region; a first wavelength conversion pattern located on the first color filter and overlapping the first emitting region; and a first optical pattern located between the first wavelength conversion pattern and the filler and overlapping the first emitting region. The refractive index of the first optical pattern may be greater than the refractive index of the filler, and the surface of the first optical pattern facing the filler may include a curved surface convex toward the filler.

[0028] In some embodiments, the refractive index of the filler may be greater than or equal to 1.4 and less than 1.7, and the refractive index of the first optical pattern may be greater than or equal to 1.8 and less than 2.5.

[0029] In some embodiments, the display device may further include: a dam pattern located on one surface of the second substrate and surrounding the first wavelength conversion pattern while overlapping the non-emissive region; and a columnar spacer located on one surface of the dam pattern facing the first substrate. The columnar spacer and the first optical pattern may be made of the same material.

[0030] In some embodiments, the columnar spacer may contact the thin-film encapsulation layer, and the first optical pattern may be spaced apart from the thin-film encapsulation layer, with a filler between the first optical pattern and the thin-film encapsulation layer.

[0031] In some embodiments, the display device may further include a capping layer covering the first wavelength conversion pattern and the dam pattern. The first optical pattern and the columnar spacer may be located on a surface of the capping layer facing the first substrate.

[0032] In some embodiments, the edge of the first emission region may completely surround the first optical pattern in a plan view.

[0033] In some embodiments, the first base may further include a second emitting region and a third emitting region. The display device may further include: a second light-emitting element located on the first base and overlapping the second emitting region; a third light-emitting element located on the first base and overlapping the third emitting region; a second color filter located on one surface of the second base and overlapping the second emitting region; a second wavelength conversion pattern located on the second color filter and overlapping the second emitting region; a second optical pattern located between the second wavelength conversion pattern and the filler, and overlapping the second emitting region; a third color filter located on one surface of the second base and overlapping the third emitting region; a light transmission pattern located on the third color filter and overlapping the third emitting region; and a third optical pattern located between the light transmission pattern and the filler, and overlapping the third emitting region. The surfaces of the second optical pattern facing the filler and the third optical pattern facing the filler may have curved surfaces convex toward the filler.

[0034] In some embodiments, in the display device according to claim 24, the first optical pattern, the second optical pattern and the third optical pattern may be provided as a plurality, and the number of the first optical pattern overlapping the first emission region and the number of the second optical pattern overlapping the second emission region may be different from the number of the third optical pattern overlapping the third emission region.

[0035] Other features and embodiments will become apparent from the following detailed description, drawings, and claims.

[0036] [Beneficial Effects]

[0037] According to embodiments of this disclosure, a display device with improved light efficiency can be provided.

[0038] The beneficial effects of this disclosure are not limited to those described above, and various other beneficial effects are included herein. Attached Figure Description

[0039] Figure 1 This is a schematic perspective view of a display device according to one embodiment.

[0040] Figure 2 It is the edge of the display device Figure 1 A schematic cross-sectional view of the line X1-X1'.

[0041] Figure 3 yes Figure 1 A magnified plan view of part Q1, and more specifically, included in Figure 1 A schematic plan view of the display substrate in the display device.

[0042] Figure 4 yes Figure 1A magnified plan view of part Q1, and more specifically, included in Figure 1 A schematic plan view of a color conversion substrate in a display device.

[0043] Figure 5 The display device according to one embodiment is along Figure 3 and Figure 4 The cross-sectional view taken by line X3-X3'.

[0044] Figure 6 The display device according to one embodiment is along Figure 3 and Figure 4 The cross-sectional view taken from line X5-X5'.

[0045] Figure 7 The display device according to one embodiment is along Figure 3 and Figure 4 The cross-sectional view taken from line X7-X7'.

[0046] Figure 8 yes Figure 5 A magnified view of part Q3.

[0047] Figure 9 It is shown Figure 8 The view shows a modified example of the structure.

[0048] Figure 10 yes Figure 5 A magnified view of part of Q5.

[0049] Figure 11 yes Figure 5 A magnified view of part of Q7.

[0050] Figure 12 This is a plan view illustrating a schematic arrangement of a third color filter in a color conversion substrate of a display device according to one embodiment.

[0051] Figure 13 This is a plan view illustrating a schematic arrangement of a first color filter in a color conversion substrate of a display device according to one embodiment.

[0052] Figure 14 This is a plan view illustrating a schematic arrangement of a second color filter in a color conversion substrate of a display device according to one embodiment.

[0053] Figure 15 This is a plan view illustrating a schematic arrangement of a dam pattern in a color conversion substrate of a display device according to one embodiment.

[0054] Figure 16 This is a plan view illustrating a schematic arrangement of optical patterns and columnar spacers in a color conversion substrate of a display device according to one embodiment.

[0055] Figure 17 This is a plan view illustrating a schematic arrangement of a first wavelength conversion pattern, a second wavelength conversion pattern, and a light transmission pattern in a color conversion substrate of a display device according to one embodiment.

[0056] Figure 18 The display device according to another embodiment is along Figure 3 and Figure 4 The cross-sectional view taken by line X3-X3'.

[0057] Figure 19 The display device according to another embodiment is along Figure 3 and Figure 4 The cross-sectional view taken from line X5-X5'.

[0058] Figure 20 The display device according to another embodiment is along Figure 3 and Figure 4 The cross-sectional view taken from line X7-X7'.

[0059] Figure 21 The display device according to yet another embodiment Figure 3 and Figure 4 The cross-sectional view taken by line X3-X3'.

[0060] Figure 22 The display device according to yet another embodiment Figure 3 and Figure 4 The cross-sectional view taken from line X5-X5'.

[0061] Figure 23 The display device according to yet another embodiment Figure 3 and Figure 4 The cross-sectional view taken from line X7-X7'.

[0062] Figure 24 The display device according to yet another embodiment Figure 3 and Figure 4 The cross-sectional view taken by line X3-X3'.

[0063] Figure 25 The display device according to yet another embodiment Figure 3 and Figure 4 The cross-sectional view taken from line X5-X5'.

[0064] Figure 26 The display device according to yet another embodiment Figure 3 and Figure 4 The cross-sectional view taken from line X7-X7'.

[0065] Figure 27The display device according to yet another embodiment Figure 3 and Figure 4 The cross-sectional view taken by line X3-X3'.

[0066] Figure 28 The display device according to yet another embodiment Figure 3 and Figure 4 The cross-sectional view taken from line X5-X5'.

[0067] Figure 29 The display device according to yet another embodiment Figure 3 and Figure 4 The cross-sectional view taken from line X7-X7'.

[0068] Figure 30 This is a plan view illustrating a schematic arrangement of optical patterns and columnar spacers in a color conversion substrate of a display device according to yet another embodiment.

[0069] Figure 31 The display device according to yet another embodiment Figure 3 and Figure 4 The cross-sectional view taken by line X3-X3'.

[0070] Figure 32 The display device according to yet another embodiment Figure 3 and Figure 4 The cross-sectional view taken from line X5-X5'.

[0071] Figure 33 The display device according to yet another embodiment Figure 3 and Figure 4 The cross-sectional view taken from line X7-X7'.

[0072] Figure 34 The display device according to yet another embodiment Figure 3 and Figure 4 The cross-sectional view taken by line X3-X3'.

[0073] Figure 35 The display device according to yet another embodiment Figure 3 and Figure 4 The cross-sectional view taken from line X5-X5'.

[0074] Figure 36 The display device according to yet another embodiment Figure 3 and Figure 4 The cross-sectional view taken from line X7-X7'.

[0075] Figure 37 This is a plan view illustrating a schematic arrangement of optical patterns and columnar spacers in a color conversion substrate of a display device according to yet another embodiment.

[0076] Figure 38 The display device according to yet another embodiment Figure 3 and Figure 4 The cross-sectional view taken by line X3-X3'.

[0077] Figure 39 The display device according to yet another embodiment Figure 3 and Figure 4 The cross-sectional view taken from line X5-X5'.

[0078] Figure 40 The display device according to yet another embodiment Figure 3 and Figure 4 The cross-sectional view taken from line X7-X7'.

[0079] Figure 41 This is a plan view illustrating a schematic arrangement of optical patterns and columnar spacers in a color conversion substrate of a display device according to yet another embodiment. Detailed Implementation

[0080] The advantages and features of this disclosure and its implementation methods can be more readily understood by referring to the following detailed description and accompanying drawings of preferred embodiments. However, this disclosure may be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be comprehensive and complete, fully conveying the inventive concept to those skilled in the art, and this disclosure will be defined only by the appended claims.

[0081] When an element or layer is referred to as "on" another element or layer, it can be directly on the other element or layer, or an intervening element or layer may be present. Conversely, when an element is referred to as "directly" on another element, no intervening element is present. The same reference numerals are used throughout the specification to refer to the same parts.

[0082] For ease of description, spatial relative terms such as “below,” “under,” “down,” “above,” and “up” are used herein to describe the relationship between one element or feature illustrated in the accompanying drawings and another element(s). It will be understood that, in addition to the orientation depicted in the drawings, the spatial relative terms are intended to also cover different orientations of the device in use. For example, if the device in the drawings is flipped, an element described as “below” or “under” other elements or features will subsequently be oriented “above” other elements or features. Therefore, the term “below” can include both the orientations of above and below.

[0083] Although the terms first, second, third, fourth, etc., may be used herein to describe various components, these components should not be limited by these terms. These terms are used to distinguish one component from another. Therefore, the first component discussed below may be referred to as any one of the second, third, and fourth components without departing from the teachings of this disclosure.

[0084] This document describes embodiments of the invention with reference to plan and cross-sectional views, which are schematic illustrations of idealized embodiments of the invention. Therefore, variations in the shapes illustrated should be expected due to factors such as manufacturing techniques and / or tolerances. Consequently, embodiments of the invention should not be construed as limited to specific shapes of the areas illustrated herein, but rather include deviations in shape, for example, due to manufacturing processes. Therefore, the areas illustrated in the figures are schematic in nature, and their shapes are not intended to represent the actual shapes of areas of the device, nor are they intended to be limiting.

[0085] In the following description, embodiments of the present disclosure will be described with reference to the accompanying drawings.

[0086] Figure 1 This is a schematic perspective view of a display device according to one embodiment. Figure 2 The display device according to one embodiment is along Figure 1 A schematic cross-sectional view of the line X1-X1'.

[0087] refer to Figure 1 and Figure 2 The display device 1 can be applied to a variety of electronic devices, such as small and medium-sized electronic devices like tablet PCs, smartphones, car navigation units, cameras, central information displays (CIDs) provided in vehicles, watch-type electronic devices, personal digital assistants (PDAs), portable multimedia players (PMPs), and game consoles, as well as medium and large-sized electronic devices like televisions, external billboards, monitors, desktop computers and laptop computers integrated with monitors. These are merely examples, but the display device 1 can also be applied to other electronic devices without departing from this disclosure.

[0088] In some embodiments, the display device 1 may have a rectangular shape in a plan view. The display device 1 may include two first sides extending in a first direction X and two second sides extending in a second direction Y intersecting the first direction X. The angle where the first and second sides of the display device 1 intersect may be a right angle. However, this disclosure is not limited thereto, and the angle may be curved. In some embodiments, the lengths of the first and second sides may be different from each other, but this disclosure is not limited thereto. The planar shape of the display device 1 is not limited to the shape illustrated, but may have a circular shape or other shapes.

[0089] The display device 1 may include a display area DA for displaying images and a non-display area NDA for not displaying images. In some embodiments, the non-display area NDA may be located around the display area DA and may surround the display area DA. The image displayed in the display area DA may be visually recognized by the user in a third direction Z, as indicated by the arrows in the figures, which intersects the first direction X and the second direction Y.

[0090] The schematic stacked structure of the display device 1 is described, in some embodiments, such as Figure 2 As shown, the display device 1 may include a display substrate 10 and a color conversion substrate 30 facing the display substrate 10, and may further include a sealing portion 50 for bonding the display substrate 10 and the color conversion substrate 30, and a filler 70 filled between the display substrate 10 and the color conversion substrate 30.

[0091] The display substrate 10 may include elements and circuitry for displaying images, such as pixel circuitry including switching elements, self-emissive elements, and pixel defining layers that define emitting and non-emitting areas (described later) in the display area DA. In embodiments, the self-emissive element may include at least one of organic light-emitting diodes (OLEDs), quantum dot OLEDs, inorganic micro-LEDs (e.g., micro-LEDs), and inorganic nano-LEDs (e.g., nano-LEDs). Hereinafter, for simplicity, the case where the self-emissive element is an organic light-emitting element will be described as an example.

[0092] The schematic stacked structure of the display substrate 10 is described below, in which the light-emitting element ED may be located on the first substrate 110, and the thin-film encapsulation layer 170 may be located on the light-emitting element ED to cover the light-emitting element ED. The specific stacked structure of the display substrate 10 will be described later.

[0093] The color conversion substrate 30 may be located above the display substrate 10 so as to face the display substrate 10. In some embodiments, the color conversion substrate 30 may include a color conversion pattern for converting the color of incident light. In some embodiments, the color conversion substrate 30 may include at least one of a color filter and a wavelength conversion pattern as the color conversion pattern. In some embodiments, the color conversion substrate 30 may include both a color filter and a wavelength conversion pattern.

[0094] The sealing portion 50 can be located between the display substrate 10 and the color conversion substrate 30 in the non-display area NDA. The sealing portion 50 can be provided along the edges of the display substrate 10 and the color conversion substrate 30 in the non-display area NDA to surround the display area DA in a plan view. The display substrate 10 and the color conversion substrate 30 can be joined together by the sealing portion 50.

[0095] In some embodiments, the sealing portion 50 may be made of an organic material. For example, the sealing portion 50 may be made of an epoxy resin, but is not limited thereto.

[0096] In some embodiments, the sealing portion 50 may be configured to overlap with the thin-film encapsulation layer 170 of the display substrate 10. In other words, the sealing portion 50 may be located between the thin-film encapsulation layer 170 and the color conversion substrate 30 in the non-display area NDA. In some embodiments, the sealing portion 50 may be in direct contact with the thin-film encapsulation layer 170.

[0097] The filler 70 can be located in the space between the display substrate 10 and the color conversion substrate 30, surrounded by the sealing portion 50. The filler 70 can fill the space between the display substrate 10 and the color conversion substrate 30.

[0098] In some embodiments, the filler 70 may be made of a light-transmitting material. In some embodiments, the filler 70 may be made of an organic material. For example, the filler 70 may be made of a silicone-based organic material, an epoxy-based organic material, or a mixture of a silicone-based organic material and an epoxy-based organic material.

[0099] In some embodiments, the filler 70 may be made of a material having a substantially zero extinction coefficient. There is a correlation between refractive index and extinction coefficient, and the extinction coefficient decreases as the refractive index decreases. Additionally, the extinction coefficient can converge substantially to zero when the refractive index is below 1.7. In some embodiments, the filler 70 may be made of a material having a refractive index below 1.7, and thus can prevent or minimize the absorption of light supplied from the self-emissive element as it passes through the filler 70. In some embodiments, the filler 70 may be made of an organic material having a refractive index of 1.4 to 1.6.

[0100] Figure 3 yes Figure 1 A magnified plan view of part Q1, and more specifically, included in Figure 1 A schematic plan view of the display substrate in the display device. Figure 4 yes Figure 1 A magnified plan view of part Q1, and more specifically, included in Figure 1 A schematic plan view of a color conversion substrate in a display device.

[0101] Apart from Figure 1 and Figure 2 In addition, further reference Figure 3 and Figure 4In the display area DA, multiple emitting regions and non-emitting regions NLA can be defined in the display substrate 10. In some embodiments, the first emitting region LA1, the second emitting region LA2, and the third emitting region LA3 can be defined in the display area DA of the display substrate 10. In the first emitting region LA1, the second emitting region LA2, and the third emitting region LA3, light generated from the light-emitting element of the display substrate 10 can be emitted to the outside of the display substrate 10, while in the non-emitting region NLA, light may not be emitted to the outside of the display substrate 10.

[0102] In some embodiments, the light supplied to the color conversion substrate 30 from the first emission region LA1, the second emission region LA2, and the third emission region LA3 may be light of a third color. In some embodiments, the third color light may be blue light and may have a peak wavelength in the range of about 440 nm to about 480 nm.

[0103] In some embodiments, the first emission area LA1, the second emission area LA2, and the third emission area LA3 may form a group (hereinafter referred to as an "emission area group"), and multiple groups may be defined in the display area DA. The emission area groups may be repeatedly arranged along the first direction X and the second direction Y.

[0104] In some embodiments, such as Figure 3 As shown, each of the first emission region LA1 and the second emission region LA2 may include a region extending along a first direction X (hereinafter referred to as the "first extended region") and a region extending along a second direction Y (hereinafter referred to as the "second extended region"). Furthermore, the first extended regions of the first emission region LA1 and the second emission region LA2 may be positioned facing each other. Referring to the figures, a third emission region LA3 may be located on one side of the first emission region LA1 and the second emission region LA2 in the second direction Y, and more specifically, located to the upper left of the first emission region LA1 and to the upper right of the second emission region LA2.

[0105] However, this disclosure is not limited thereto, and the arrangement of the first launch area LA1, the second launch area LA2 and the third launch area LA3 can be changed in various ways.

[0106] In some embodiments, the size of at least one of the first emitting region LA1, the second emitting region LA2, and the third emitting region LA3 may differ from the size of the others. For example, the size of the third emitting region LA3 may be smaller than the size of the first emitting region LA1 and the second emitting region LA2. Additionally, the size of the second emitting region LA2 may be the same as or smaller than the size of the first emitting region LA1. By changing the size of the emitting regions, the amount of light supplied to each light-transmitting region of the color conversion substrate 30 can be changed, and correspondingly, the amount of light of various colors converted in the color conversion substrate 30 or the amount of light of various colors emitted to the outside of the display device 1 can be adjusted.

[0107] However, this disclosure is not limited thereto, and in another embodiment, the dimensions of the first emission region LA1, the second emission region LA2, and the third emission region LA3 may be substantially the same. Furthermore, the size relationship between the emission regions can be modified in various ways.

[0108] In some embodiments, the non-display area NDA of the display substrate 10 may be located around the display area DA and may surround the display area DA.

[0109] In the display area DA, multiple light-transmitting areas and light-shielding areas BA can be defined in the color conversion substrate 30. In the light-transmitting areas, light emitted from the display substrate 10 can pass through the color conversion substrate 30 to be provided to the outside of the display device 1. The light-shielding areas BA can be areas through which light emitted from the display substrate 10 does not pass.

[0110] In some embodiments, the first light-transmitting region TA1, the second light-transmitting region TA2, and the third light-transmitting region TA3 may be defined in the color conversion substrate 30.

[0111] The first light-transmitting region TA1 may correspond to or overlap with the first emitting region LA1. Similarly, the second light-transmitting region TA2 may correspond to or overlap with the second emitting region LA2, and the third light-transmitting region TA3 may correspond to or overlap with the third emitting region LA3.

[0112] In some embodiments, the size of the first light-transmitting region TA1 may be larger than the size of the first emitting region LA1, and in a plan view, the edge of the first light-transmitting region TA1 may completely surround the edge of the first emitting region LA1. Similarly, the size of the second light-transmitting region TA2 may be larger than the size of the second emitting region LA2, and in a plan view, the edge of the second light-transmitting region TA2 may completely surround the edge of the second emitting region LA2. Furthermore, the size of the third light-transmitting region TA3 may be larger than the size of the third emitting region LA3, and in a plan view, the edge of the third light-transmitting region TA3 may completely surround the edge of the third emitting region LA3.

[0113] In some embodiments, the size of the first light-transmitting area TA1 may be substantially the same as the size of the second light-transmitting area TA2, and the size of the third light-transmitting area TA3 may be smaller than the size of the first light-transmitting area TA1 and the second light-transmitting area TA2.

[0114] In some embodiments, light of a third color provided from the display substrate 10 can pass through the first light-transmitting region TA1, the second light-transmitting region TA2, and the third light-transmitting region TA3, and be provided to the outside of the display device 1 in a state where a portion of it is wavelength-converted and the other portion is not. When the light emitted from the first light-transmitting region TA1 to the outside of the display device 1 is referred to as the first emitted light, the light emitted from the second light-transmitting region TA2 to the outside of the display device 1 is referred to as the second emitted light, and the light emitted from the third light-transmitting region TA3 to the outside of the display device 1 is referred to as the third emitted light, the first emitted light can be light of the first color, the second emitted light can be light of a second color different from the first color, and the third emitted light can be light of the third color. In some embodiments, the third color light can be blue light having a peak wavelength in the range of about 440 nm to about 480 nm, as described above, and the first color light can be red light having a peak wavelength in the range of about 610 nm to about 650 nm. Additionally, the second color light can be green light having a peak wavelength in the range of about 510 nm to about 550 nm. The first and second colors of light can be light converted from the wavelength of the third color.

[0115] In the display area DA, the light-shielding area BA may be located around the first light-transmitting area TA1, the second light-transmitting area TA2, and the third light-transmitting area TA3 of the color conversion substrate 30. In some embodiments, the light-shielding area BA may surround the first light-transmitting area TA1, the second light-transmitting area TA2, and the third light-transmitting area TA3.

[0116] In the display area DA, the columnar spacer CS can be located in the light-shielding area BA of the color conversion substrate 30. The columnar spacer CS can maintain a constant gap between the color conversion substrate 30 and the display substrate 10, thereby improving the uniformity and spreadability of the filler 70.

[0117] In some embodiments, the columnar spacer CS may be located on one side of the first light-transmitting area TA1 in the second direction Y and on one side of the third light-transmitting area TA3 in the first direction X.

[0118] The structure of the display device 1 will be described in more detail below.

[0119] Figure 5 The display device according to one embodiment is along Figure 3 and Figure 4 The cross-sectional view taken by line X3-X3'. Figure 6The display device according to one embodiment is along Figure 3 and Figure 4 The cross-sectional view taken from line X5-X5'. Figure 7 The display device according to one embodiment is along Figure 3 and Figure 4 The cross-sectional view taken from line X7-X7'. Figure 8 yes Figure 5 A magnified view of part Q3. Figure 9 It is shown Figure 8 The view shows a modified example of the structure. Figure 10 yes Figure 5 A magnified view of part of Q5. Figure 11 yes Figure 5 A magnified view of part of Q7.

[0120] Apart from Figures 1 to 4 In addition, further reference Figures 5 to 11 As described above, the display device 1 may include a display substrate 10 and a color conversion substrate 30, and may further include a filler 70 located between the display substrate 10 and the color conversion substrate 30.

[0121] The display substrate 10 will be described below.

[0122] The first base 110 may be made of a light-transmitting material. In some embodiments, the first base 110 may be a glass substrate or a plastic substrate. In some embodiments, the first base 110 may be flexible. In some embodiments, the first base 110 may further include a separate layer, such as a buffer layer or an insulating layer, disposed on the glass substrate or the plastic substrate.

[0123] In some embodiments, as described above, a plurality of emission regions LA1, LA2 and LA3 and a non-emission region NLA may be defined in the first base 110.

[0124] like Figure 5 and Figure 6 As shown, switching elements T1, T2, and T3 may be located on the first base 110. In some embodiments, the first switching element T1 may overlap with the first emitter region LA1, the second switching element T2 may overlap with the second emitter region LA1, and the third switching element T3 may overlap with the third emitter region LA3. Although the first switching element T1, the second switching element T2, and the third switching element T3 are illustrated in the figures as not overlapping with the non-emitter region NLA, this is merely an example. In another embodiment, at least one of the first switching element T1, the second switching element T2, and the third switching element T3 may overlap with the non-emitter region NLA. Alternatively, in yet another embodiment, all of the first switching element T1, the second switching element T2, and the third switching element T3 may overlap with the non-emitter region NLA.

[0125] Although not shown in the accompanying drawings, multiple signal lines (e.g., gate lines, data lines, and power lines) that transmit signals to the switching element may be further located on the first base 110.

[0126] Each of the first switching element T1, the second switching element T2, and the third switching element T3 can be a thin-film transistor.

[0127] The insulating layer 130 may be located on the first switching element T1, the second switching element T2, and the third switching element T3. In some embodiments, the insulating layer 130 may be a planarization layer. In some embodiments, the insulating layer 130 may include an organic material. For example, the insulating layer 130 may include acrylic resin, epoxy resin, imide resin, or ester resin, etc. In some embodiments, the insulating layer 130 may include a photosensitive organic material.

[0128] The first anode electrode AE1, the second anode electrode AE2, and the third anode electrode AE3 can be located on the insulating layer 130.

[0129] The first anode electrode AE1 may overlap with the first emitter region LA1 and may at least partially extend into the non-emitter region NLA. The second anode electrode AE2 may overlap with the second emitter region LA2 and may at least partially extend into the non-emitter region NLA. The third anode electrode AE3 may overlap with the third emitter region LA3 and may at least partially extend into the non-emitter region NLA. The first anode electrode AE1 may pass through the insulating layer 130 and be connected to the first switching element T1, and the second anode electrode AE2 may pass through the insulating layer 130 and be connected to the second switching element T2. The third anode electrode AE3 may pass through the insulating layer 130 and be connected to the third switching element T3.

[0130] In some embodiments, the first anode electrode AE1, the second anode electrode AE2, and the third anode electrode AE3 may be reflective electrodes. In this case, the first anode electrode AE1, the second anode electrode AE2, and the third anode electrode AE3 may be a metal layer comprising at least one of Ag, Mg, Al, Pt, Pd, Au, Ni, Nd, Ir, and Cr. In another embodiment, the first anode electrode AE1, the second anode electrode AE2, and the third anode electrode AE3 may further comprise a metal oxide layer stacked on the metal layer. In embodiments, the first anode electrode AE1, the second anode electrode AE2, and the third anode electrode AE3 may have a multilayer structure, such as a bilayer structure of ITO / Ag, Ag / ITO, ITO / Mg, or ITO / MgF2, or a trilayer structure such as ITO / Ag / ITO.

[0131] The pixel defining layer 150 can be located on the first anode electrode AE1, the second anode electrode AE2, and the third anode electrode AE3. The pixel defining layer 150 may include openings exposing the first anode electrode AE1, the second anode electrode AE2, and the third anode electrode AE3, and may define a first emission region LA1, a second emission region LA2, a third emission region LA3, and a non-emission region NLA. That is, the area of ​​the first anode electrode AE1 exposed but not covered by the pixel defining layer 150 can be the first emission region LA1. Similarly, the area of ​​the second anode electrode AE2 exposed but not covered by the pixel defining layer 150 can be the second emission region LA2, and the area of ​​the third anode electrode AE3 exposed but not covered by the pixel defining layer 150 can be the third emission region LA3. Furthermore, the area where the pixel defining layer 150 is located can be the non-emission region NLA.

[0132] In some embodiments, the pixel defining layer 150 may include an organic insulating material selected from the group consisting of acrylic resin, epoxy resin, phenolic resin, polyamide resin, polyimide resin, unsaturated polyester resin, polystyrene resin, polyphenylene sulfide resin and benzocyclobutene (BCB).

[0133] In some embodiments, the pixel defining layer 150 may overlap with the first color filter 231, the second color filter 233, and the third color filter 235, which will be described later. Additionally, in some embodiments, the pixel defining layer 150 may also overlap with the dike pattern 370, which will be described later.

[0134] like Figures 5 to 7 As shown, the light-emitting layer OL can be located on the first anode electrode AE1, the second anode electrode AE2, the third anode electrode AE3, and the pixel defining layer 150.

[0135] In some embodiments, the luminescent layer OL may have the shape of a continuous film formed over multiple emitting regions LA1, LA2, and LA3 and a non-emitting region NLA. A more detailed description of the luminescent layer OL will be given later.

[0136] like Figures 5 to 7 As shown, the cathode electrode CE can be located on the light-emitting layer OL.

[0137] In some embodiments, the cathode electrode CE may have semi-transmissive or transmissive properties. When the cathode electrode CE has semi-transmissive properties, it may comprise Ag, Mg, Cu, Al, Pt, Pd, Au, Ni, Nd, Ir, Cr, Li, Ca, LiF, Mo, Ti, or compounds or mixtures thereof (such as mixtures of Ag and Mg), or a material having a multilayer structure such as LiF / Ca or LiF / Al. Additionally, when the cathode electrode CE has a thickness of tens to hundreds of angstroms, it may also have semi-transmissive properties.

[0138] When the cathode electrode CE has transmission characteristics, the cathode electrode CE may include a transparent conductive oxide (TCO). For example, the cathode electrode CE may include tungsten oxide (W). x O y Titanium oxide (TiO2), indium tin oxide (ITO), indium zinc oxide (IZO), zinc oxide (ZnO), indium tin zinc oxide (ITZO), or magnesium oxide (MgO), etc.

[0139] A first anode electrode AE1, a light-emitting layer OL, and a cathode electrode CE can constitute a first light-emitting element ED1. A second anode electrode AE2, a light-emitting layer OL, and a cathode electrode CE can constitute a second light-emitting element ED2. A third anode electrode AE3, a light-emitting layer OL, and a cathode electrode CE can constitute a third light-emitting element ED3. Each of the first light-emitting element ED1, the second light-emitting element ED2, and the third light-emitting element ED3 can emit emitted light LE, and the emitted light LE can be provided to the color conversion substrate 30.

[0140] like Figure 8 As shown, the emitted light LE finally emitted from the emitting layer OL can be a mixture of a first component LE1 and a second component LE2. The first component LE1 and the second component LE2 of the emitted light LE can each have a peak wavelength above 440 nm and below 480 nm. The peak wavelengths of the first component LE1 and the second component LE2 can be chosen to be the same as or different from each other. That is, the emitted light LE can be blue light.

[0141] like Figure 8As shown, in some embodiments, the light-emitting layer OL may have a structure in which multiple light-emitting layers are configured to overlap each other (e.g., a series structure). For example, the light-emitting layer OL may include a first stack ST1 containing a first light-emitting layer EML1, a second stack ST2 located on the first stack ST1 and containing a second light-emitting layer EML2, a third stack ST3 located on the second stack ST2 and containing a third light-emitting layer EML3, a first charge-generating layer CGL1 located between the first stack ST1 and the second stack ST2, and a second charge-generating layer CGL2 located between the second stack ST2 and the third stack ST3. The first stack ST1, the second stack ST2, and the third stack ST3 may be configured to overlap each other.

[0142] The first light-emitting layer EML1, the second light-emitting layer EML2, and the third light-emitting layer EML3 can be configured to overlap each other.

[0143] In some embodiments, all of the first emissive layer EML1, the second emissive layer EML2, and the third emissive layer EML3 can emit light of blue wavelengths. For example, each of the first emissive layer EML1, the second emissive layer EML2, and the third emissive layer EML3 can be a blue emissive layer and can include organic materials. However, this disclosure is not limited thereto, and in another embodiment, at least one of the first emissive layer EML1, the second emissive layer EML2, and the third emissive layer EML3 can include an inorganic material that emits blue light. For example, at least one of the first emissive layer EML1, the second emissive layer EML2, and the third emissive layer EML3 can be formed of an inorganic light-emitting element, or can be part of an inorganic light-emitting element. In some other embodiments, the inorganic light-emitting element can have a width of nanometer size.

[0144] In some embodiments, at least one of the first emissive layer EML1, the second emissive layer EML2, and the third emissive layer EML3 can emit first blue light having a first peak wavelength, and at least one of them can emit second blue light having a second peak wavelength different from the first peak wavelength. For example, any one of the first emissive layer EML1, the second emissive layer EML2, and the third emissive layer EML3 can emit first blue light having a first peak wavelength, and the other two of them can emit second blue light having a second peak wavelength. That is, the emitted light LE last emitted from the emissive layer OL can be a mixed light of a first component LE1 and a second component LE2, where the first component LE1 can be first blue light having a first peak wavelength, and the second component LE2 can be second blue light having a second peak wavelength.

[0145] In some embodiments, one of the first peak wavelength and the second peak wavelength may be in the range of 440 nm or higher and less than 460 nm, and the other may be in the range of 460 nm or higher and less than 480 nm. However, the ranges of the first peak wavelength and the second peak wavelength are not limited thereto. For example, both the ranges of the first peak wavelength and the second peak wavelength may include 460 nm. In some embodiments, one of the first blue light and the second blue light may be dark blue, and the other may be sky blue.

[0146] According to some embodiments, the emitted light LE from the emissive layer OL can be blue light and can include both long-wavelength and short-wavelength components. Therefore, ultimately, the emissive layer OL can emit blue light with an emission peak over a wider wavelength range as the emitted light LE. Accordingly, compared to conventional light-emitting elements that emit blue light with a sharp emission peak, this offers the advantage of improved color visibility from a side viewing angle.

[0147] In some embodiments, each of the first light-emitting layer EML1, the second light-emitting layer EML2, and the third light-emitting layer EML3 may include a host and a dopant. The material of the host is not particularly limited, as long as it is commonly used. For example, tris(8-hydroxyquinoline)aluminum (Alq3), 4,4'-bis(N-carbazolyl)-1,1'-biphenyl (CBP), poly(N-vinylcarbazole) (PVK), 9,10-bis(naphthyl-2-yl)anthracene (ADN), 4,4',4”-tris(carbazolyl-9-yl)-triphenylamine (TCTA), 1,3,5-tris(N-phenylbenzimidazolyl-2-yl)benzene (TPBi), 3-tert-butyl-9,10-bis(naphthyl-2-yl)anthracene (TBADN), stilbeneylarylene (DSA), 4,4'-bis(9-carbazolyl)-2,2'-dimethyl-biphenyl (CDBP) or 2-methyl-9,10-bis(naphthyl-2-yl)anthracene (MADN) can be used.

[0148] The first emitting layer EML1, the second emitting layer EML2, and the third emitting layer EML3 emitting blue light may each comprise a fluorescent material selected from, for example, polymers composed of spiro-DPVBi, spiro-6P, stilbene-phenylene (DSB), stilbene-aryl (DSA), polyfluorene (PFO) polymers, and poly(p-phenylenevinylene) (PPV) polymers. As another example, phosphorescent materials comprising organometallic complexes such as (4,6-F₂ppy)₂Irpic may be included. However, the materials emitting blue light are not limited to these.

[0149] As described above, at least one of the first emitting layer EML1, the second emitting layer EML2, and the third emitting layer EML3 emits blue light in a different wavelength band than the blue light emitted by at least one of them. To emit blue light in different wavelength bands, the first emitting layer EML1, the second emitting layer EML2, and the third emitting layer EML3 may comprise the same material, and a method of adjusting the resonant distance may be used. Alternatively, to emit blue light in different wavelength ranges, at least one of the first emitting layer EML1, the second emitting layer EML2, and the third emitting layer EML3 may comprise materials different from each other.

[0150] However, this disclosure is not limited thereto. All of the first emitting layer EML1, the second emitting layer EML2, and the third emitting layer EML3 can emit blue light with a peak wavelength of 440 nm to 480 nm, and can be made of the same material.

[0151] Alternatively, in another embodiment, at least one of the first emissive layer EML1, the second emissive layer EML2, and the third emissive layer EML3 can emit first blue light having a first peak wavelength, another of them can emit second blue light having a second peak wavelength different from the first peak wavelength, and the remaining one of them can emit third blue light having a third peak wavelength different from the first and second peak wavelengths. In some other embodiments, any one of the first, second, and third peak wavelengths can be in the range of 440 nm or higher and less than 460 nm. Another one of the first, second, and third peak wavelengths can be in the range of 460 nm or higher and less than 470 nm, and the remaining one of them can be in the range of 470 nm or higher and less than 480 nm.

[0152] According to some other embodiments, the emitted light LE from the emitting layer OL is blue light and includes long-wavelength, medium-wavelength, and short-wavelength components. Therefore, ultimately, the emitting layer OL can emit blue light with emission peaks over a wider wavelength range as emitted light LE, thereby improving color visibility from a side viewing angle.

[0153] According to the above embodiments, compared with conventional light-emitting elements that do not employ a series structure (i.e., a structure in which multiple light-emitting layers are stacked), they have the advantages of improving light efficiency and increasing the lifespan of the display device.

[0154] Alternatively, in some other embodiments, at least one of the first emissive layer EML1, the second emissive layer EML2, and the third emissive layer EML3 can emit light of a third color, such as blue light, and at least one of them can emit light of a second color, such as green light. In some other embodiments, the peak wavelength of the blue light emitted from at least one of the first emissive layer EML1, the second emissive layer EML2, and the third emissive layer EML3 can be in the range of 440 nm or higher and 480 nm or lower, or in the range of 460 nm or higher and 480 nm or lower. The green light emitted from at least one of the first emissive layer EML1, the second emissive layer EML2, and the third emissive layer EML3 can have a peak wavelength in the range of 510 nm to 550 nm.

[0155] For example, any one of the first emitting layer EML1, the second emitting layer EML2, and the third emitting layer EML3 can be a green emitting layer that emits green light, and the other two of them can be blue emitting layers that emit blue light. When the other two of the first emitting layer EML1, the second emitting layer EML2, and the third emitting layer EML3 are blue emitting layers, the blue light emitted from these two blue emitting layers can have the same peak wavelength range, or they can have different peak wavelength ranges.

[0156] According to some other embodiments, the emitted light LE from the emissive layer OL can be a mixture of a first component LE1 of blue light and a second component LE2 of green light. For example, when the first component LE1 is deep blue light and the second component LE2 is green light, the emitted light LE can have a sky blue color. Similar to the embodiments described above, the emitted light LE from the emissive layer OL is a mixture of blue and green light, and includes both long-wavelength and short-wavelength components. Therefore, ultimately, the emissive layer OL can emit blue light with an emission peak over a wider wavelength range as the emitted light LE, thereby improving color visibility from a side viewing angle. In addition, since the second component LE2 of the emitted light LE is green light, it can supplement the green light component of the light supplied from the display device 1 to the outside, thereby improving the color reproduction of the display device 1.

[0157] In some other embodiments, the green light-emitting layer in the first light-emitting layer EML1, the second light-emitting layer EML2, and the third light-emitting layer EML3 may include a substrate and a dopant. The material of the substrate comprising the green light-emitting layer is not particularly limited, as long as it is commonly used. For example, tris(8-hydroxyquinoline)aluminum (Alq3), 4,4'-bis(N-carbazolyl)-1,1'-biphenyl (CBP), poly(N-vinylcarbazole) (PVK), 9,10-bis(naphthyl-2-yl)anthracene (ADN), 4,4',4”-tris(carbazolyl-9-yl)-triphenylamine (TCTA), 1,3,5-tris(N-phenylbenzimidazolyl-2-yl)benzene (TPBi), 3-tert-butyl-9,10-bis(naphthyl-2-yl)anthracene (TBADN), stilbeneylarylene (DSA), 4,4'-bis(9-carbazolyl)-2,2'-dimethyl-biphenyl (CDBP) or 2-methyl-9,10-bis(naphthyl-2-yl)anthracene (MADN) can be used.

[0158] The dopants included in the green emitting layer may include fluorescent materials containing, for example, tris(8-hydroxyquinoline)aluminum(III) (Alq3), or phosphorescent materials such as planar tris(2-phenylpyridine)iridium (Ir(ppy)3), bis(2-phenylpyridine)(acetylacetonate)iridium(III) (Ir(ppy)2(acac)) and 2-phenyl-4-methylpyridineiridium (Ir(mpyp)3).

[0159] A first charge generation layer CGL1 may be located between a first stack ST1 and a second stack ST2. The first charge generation layer CGL1 can be used to allow charge to be injected into each of the light-emitting layers. The first charge generation layer CGL1 can be used to control the charge balance between the first stack ST1 and the second stack ST2. The first charge generation layer CGL1 may include an n-type charge generation layer CGL11 and a p-type charge generation layer CGL12. The p-type charge generation layer CGL12 may be disposed on the n-type charge generation layer CGL11 and between the n-type charge generation layer CGL11 and the second stack ST2.

[0160] The first charge-generating layer CGL1 may have a structure in which the n-type charge-generating layer CGL11 and the p-type charge-generating layer CGL12 are in contact with each other. The n-type charge-generating layer CGL11 is positioned closer to the anode electrodes AE1 and AE2 than the cathode electrode CE. Figure 5 ) and AE3 ( Figure 6 The p-type charge generation layer CGL12 is configured to be more efficient than the anode electrodes AE1 and AE2. Figure 5 ) and AE3 ( Figure 6 The n-type charge-generating layer CGL11 supplies electrons to the adjacent anode electrodes AE1 and AE2, located near the cathode electrode CE. Figure 5) and AE3 ( Figure 6 The first light-emitting layer EML1 is disposed between the first stack ST1 and the second stack ST2 to provide charge to each light-emitting layer, thereby improving luminous efficiency and reducing driving voltage.

[0161] The first stack ST1 can be located at the first anode electrode AE1 ( Figure 8 ), second anode electrode AE2 ( Figure 5 ) and the third anode electrode AE3 ( Figure 6 It may further include a first hole transport layer HTL1, a first electron blocking layer BIL1 and a first electron transport layer ETL1.

[0162] The first hole transport layer HTL1 can be located at the first anode electrode AE1 and the second anode electrode AE2. Figure 5 ) and the third anode electrode AE3 ( Figure 6 The first hole transport layer HTL1 is used to facilitate hole transport and may include hole transport materials. Hole transport materials may include, but are not limited to, carbazole derivatives such as N-phenylcarbazole or polyvinylcarbazole, fluorene derivatives, triphenylamine derivatives such as N,N'-bis(3-methylphenyl)-N,N'-diphenyl-[1,1-biphenyl]-4,4'-diamine (TPD) or 4,4',4”-tris(N-carbazolyl)triphenylamine (TCTA), N,N'-bis(1-naphthyl)-N,N'-diphenylbenzidine (NPB), 4,4'-cyclohexylenebis[N,N-bis(4-methylphenyl)aniline] (TAPC), etc.

[0163] The first electron blocking layer BIL1 may be located on the first hole transport layer HTL1 and between the first hole transport layer HTL1 and the first light-emitting layer EML1. The first electron blocking layer BIL1 may include a hole transport material and a metal or metal compound to prevent electrons generated in the first light-emitting layer EML1 from moving into the first hole transport layer HTL1. In some embodiments, the first hole transport layer HTL1 and the first electron blocking layer BIL1 may also be formed from a monolayer of various materials mixed therein.

[0164] The first electron transport layer ETL1 may be located on the first light-emitting layer EML1 and between the first charge-generating layer CGL1 and the first light-emitting layer EML1. In some embodiments, the first electron transport layer ETL1 may include, for example, tris(8-hydroxyquinoline)aluminum (Alq3), 1,3,5-tris(1-phenyl-1H-benzo[d]imidazol-2-yl)phenyl (TPBi), 2,9-dimethyl-4,7-diphenyl-1,10-phenanthroline (BCP), 4,7-diphenyl-1,10-phenanthroline (Bphen), 3-(4-biphenyl)-4-phenyl-5-tert-butylphenyl-1,2,4-triazole (TAZ), 4- Electron transport materials comprising (naphthyl-1-yl)-3,5-diphenyl-4H-1,2,4-triazole (NTAZ), 2-(4-biphenyl)-5-(4-tert-butylphenyl)-1,3,4-oxadiazole (tBu-PBD), bis(2-methyl-8-hydroxyquinoline-N1,O8)-(1,1'-biphenyl-4-hydroxy)aluminum (BAlq), bis(benzoquinoline-10-hydroxyberyllium) (Bebq2), 9,10-bis(naphthyl-2-yl)anthracene (AND), or mixtures thereof. However, this disclosure is not limited to electron transport materials of the above types. The second stack ST2 may be located on the first charge-generating layer CGL1 and may further include a second hole transport layer HTL2, a second electron blocking layer BIL2, and a second electron transport layer ETL2.

[0165] The second hole transport layer HTL2 may be located on the first charge generation layer CGL1. The second hole transport layer HTL2 may be made of the same material as the first hole transport layer HTL1, or may include one or more materials selected from the examples of materials included in the first hole transport layer HTL1. The second hole transport layer HTL2 may be formed of a single layer or multiple layers.

[0166] The second electron blocking layer BIL2 may be located on the second hole transport layer HTL2 and between the second hole transport layer HTL2 and the second light-emitting layer EML2. The second electron blocking layer BIL2 may be formed of the same material and the same structure as the first electron blocking layer BIL1, or may include one or more materials selected from the examples of materials included in the first electron blocking layer BIL1.

[0167] The second electron transport layer ETL2 may be located on the second light-emitting layer EML2 and between the second charge-generating layer CGL2 and the second light-emitting layer EML2. The second electron transport layer ETL2 may be formed of the same material and the same structure as the first electron transport layer ETL1, or may include one or more materials selected from the examples of materials included in the first electron transport layer ETL1. The second electron transport layer ETL2 may be formed of a single layer or multiple layers.

[0168] The second charge generation layer CGL2 can be located on the second stack ST2 and between the second stack ST2 and the third stack ST3.

[0169] The second charge generation layer CGL2 can have the same structure as the first charge generation layer CGL1. For example, the second charge generation layer CGL2 may include an n-type charge generation layer CGL21 disposed closer to the second stack ST2 and a p-type charge generation layer CGL22 disposed closer to the cathode electrode CE. The p-type charge generation layer CGL22 may be disposed on the n-type charge generation layer CGL21.

[0170] The second charge-generating layer CGL2 may have a structure in which the n-type charge-generating layer CGL21 and the p-type charge-generating layer CGL22 are in contact with each other. The first charge-generating layer CGL1 and the second charge-generating layer CGL2 may be made of different materials or may be made of the same material.

[0171] The third stack ST3 may be located on the second charge generation layer CGL2, and may further include a third hole transport layer HTL3 and a third electron transport layer ETL3.

[0172] The third hole transport layer HTL3 may be located on the second charge generation layer CGL2. The third hole transport layer HTL3 may be made of the same material as the first hole transport layer HTL1, or may include one or more materials selected from examples of materials included in the first hole transport layer HTL1. The third hole transport layer HTL3 may be formed of a single layer or multiple layers. When the third hole transport layer HTL3 is formed of multiple layers, each layer may include different materials.

[0173] The third electron transport layer ETL3 may be located on the third light-emitting layer EML3 and between the cathode electrode CE and the third light-emitting layer EML3. The third electron transport layer ETL3 may be formed of the same material and structure as the first electron transport layer ETL1, or may include one or more materials selected from examples of materials included in the first electron transport layer ETL1. The third electron transport layer ETL3 may be formed as a single layer or multiple layers. When the third electron transport layer ETL3 is formed as multiple layers, each layer may include different materials.

[0174] Although not shown in the accompanying drawings, the hole injection layer may be further located between the first stack ST1 and the first anode electrode AE1 and the second anode electrode AE2. Figure 5 ) and the third anode electrode AE3 ( Figure 6At least one of the following: between the first light-emitting layer EML1, the second light-emitting layer EML2, and the third light-emitting layer EML3. A hole injection layer can be used to allow holes to be injected more smoothly into the first light-emitting layer EML1, the second light-emitting layer EML2, and the third light-emitting layer EML3. In some embodiments, the hole injection layer may be formed from one or more selected from the group consisting of copper phthalocyanine (CuPc), poly(3,4-ethylenedioxythiophene) (PEDOT), polyaniline (PANI), and N,N-dinaphthyl-N,N'-diphenylbenzidine (NPD), but is not limited thereto. In some embodiments, the hole injection layer may be located between the first stack ST1 and the first anode electrode AE1, the second anode electrode AE2, and the third anode electrode AE3. Figure 5 ) and the third anode electrode AE3 ( Figure 6 Between the second stack ST2 and the first charge generation layer CGL1, and between the third stack ST3 and the second charge generation layer CGL2.

[0175] Although not shown in the accompanying drawings, the electron injection layer may further be located between at least one of the following: the third electron transport layer ETL3 and the cathode electrode CE; the second charge generation layer CGL2 and the second stack ST2; and the first charge generation layer CGL1 and the first stack ST1. The electron injection layer can be used to facilitate electron injection and may use, but is not limited to, tris(8-hydroxyquinoline)aluminum (Alq3), PBD, TAZ, spirop-PBD, BAlq, or SAlq. Additionally, the electron injection layer may be a metal halide compound, for example, one or more selected from the group consisting of MgF2, LiF, NaF, KF, RbF, CsF, FrF, LiI, NaI, KI, RbI, CsI, FrI, and CaF2, but is not limited to. Furthermore, the electron injection layer may include lanthanum-based materials such as Yb, Sm, or Eu. Alternatively, the electron injection layer may include both metal halide materials such as RbI:Yb or KI:Yb and lanthanum-based materials. When the electron injection layer comprises both a metal halide material and a lanthanide material, the electron injection layer can be formed by co-depositing the metal halide material and the lanthanide material. In some embodiments, the electron injection layer may be located between the third electron transport layer ETL3 and the cathode electrode CE, between the second charge generation layer CGL2 and the second stack ST2, and between the first charge generation layer CGL1 and the first stack ST1.

[0176] In addition to the structure described above, the structure of the luminescent layer OL can be modified. For example, the luminescent layer OL can be modified as follows: Figure 9 The luminescent layer OLa shown is... Figure 8 The structures shown are different. Figure 9The light-emitting layer OLa shown may further include a fourth stack ST4 located between the third stack ST3 and the second stack ST2, and a third charge-generating layer CGL3 located between the third stack ST3 and the fourth stack ST4.

[0177] The fourth stack ST4 may include a fourth light-emitting layer EML4, and may further include a fourth hole transport layer HTL4, a third electron blocking layer BIL4, and a fourth electron transport layer ETL4.

[0178] At least one of the first emitting layer EML1, the second emitting layer EML2, the third emitting layer EML3, and the fourth emitting layer EML4 can emit green light, and at least one of the first emitting layer EML1, the second emitting layer EML2, the third emitting layer EML3, and the fourth emitting layer EML4, along with at least one of them, can emit blue light with different peak wavelength ranges.

[0179] Alternatively, at least one of the first emitting layer EML1, the second emitting layer EML2, the third emitting layer EML3, and the fourth emitting layer EML4 may emit green light, and at least one of them may emit blue light. For example, any one of the first emitting layer EML1, the second emitting layer EML2, the third emitting layer EML3, and the fourth emitting layer EML4 may be a green emitting layer, and the other three of them may all be blue emitting layers.

[0180] The fourth hole transport layer HTL4 may be located on the second charge generation layer CGL2. The fourth hole transport layer HTL4 may be made of the same material as the first hole transport layer HTL1, or may include one or more materials selected from examples of materials included in the first hole transport layer HTL1. The fourth hole transport layer HTL4 may be formed as a single layer or multiple layers. When the fourth hole transport layer HTL4 is formed as multiple layers, each layer may include different materials.

[0181] The third electron blocking layer BIL4 may be located on the fourth hole transport layer HTL4 and between the fourth hole transport layer HTL4 and the fourth light-emitting layer EML4. The third electron blocking layer BIL4 may be formed of the same material and the same structure as the first electron blocking layer BIL1, or may include one or more materials selected from examples of materials included in the first electron blocking layer BIL1. In some other embodiments, the third electron blocking layer BIL4 may be omitted.

[0182] The fourth electron transport layer ETL4 may be located on the fourth light-emitting layer EML4 and may be located between the third charge-generating layer CGL3 and the fourth light-emitting layer EML4. The fourth electron transport layer ETL4 may be formed of the same material and the same structure as the first electron transport layer ETL1, or may include one or more materials selected from examples of materials included in the first electron transport layer ETL1. The fourth electron transport layer ETL4 may be formed as a single layer or multiple layers. When the fourth electron transport layer ETL4 is formed as multiple layers, the individual layers may include different materials.

[0183] The third charge generation layer CGL3 can have the same structure as the first charge generation layer CGL1. For example, the third charge generation layer CGL3 may include an n-type charge generation layer CGL31 disposed closer to the fourth stack ST4 and a p-type charge generation layer CGL32 disposed closer to the cathode electrode CE. The p-type charge generation layer CGL32 may be disposed on the n-type charge generation layer CGL31.

[0184] Although not shown in the accompanying drawings, an electron injection layer may be further located between the fourth stack ST4 and the third charge generation layer CGL3. Additionally, a hole injection layer may be further located between the fourth stack ST4 and the second charge generation layer CGL2.

[0185] In some embodiments, Figure 8 The light-emitting layer OL shown in the figure Figure 9 The emitting layer OLa shown may not include a red emitting layer, and therefore may not emit light of a first color, such as red light. That is, the emitted light LE may not include a light component with a peak wavelength of about 610 nm to about 650 nm.

[0186] like Figures 5 to 7 As shown, the first capping layer 160 can be located on the cathode electrode CE. The first capping layer 160 can be jointly disposed in the first emitting region LA1, the second emitting region LA2, the third emitting region LA3, and the non-emitting region NLA, and can improve viewing angle characteristics and increase external luminous efficiency.

[0187] The first capping layer 160 may include at least one of inorganic and organic materials having light transmittance. That is, the first capping layer 160 may be formed of an inorganic layer, an organic layer, or an organic layer including inorganic particles. For example, the first capping layer 160 may include triamine derivatives, carbazole biphenyl derivatives, aryldiamine derivatives, or tris(8-hydroxyquinoline)aluminum (Alq3), etc.

[0188] Alternatively, the first capping layer 160 may be formed of a mixture of a high-refractive-index material and a low-refractive-index material. Alternatively, the first capping layer 160 may comprise two layers with different refractive indices (e.g., a high-refractive-index layer and a low-refractive-index layer).

[0189] like Figures 5 to 7 As shown, a thin-film encapsulation layer 170 can be disposed on the first capping layer 160. The thin-film encapsulation layer 170 is disposed together in the first emission region LA1, the second emission region LA2, the third emission region LA3, and the non-emission region NLA. In some embodiments, the thin-film encapsulation layer 170 can directly cover the first capping layer 160.

[0190] In some embodiments, the thin-film encapsulation layer 170 may include a lower inorganic layer 171, an organic layer 173, and an upper inorganic layer 175 sequentially stacked on the first capping layer 160.

[0191] The lower inorganic layer 171 can cover the first light-emitting element ED1, the second light-emitting element ED2 and the third light-emitting element ED3 in the display area DA.

[0192] The lower inorganic layer 171 may include inorganic materials and may have a multilayer structure.

[0193] The organic layer 173 can be located on the lower inorganic layer 171. The organic layer 173 can cover the first light-emitting element ED1, the second light-emitting element ED2, and the third light-emitting element ED3 in the display area DA.

[0194] In some embodiments, the organic layer 173 may be formed of acrylic resin, methacrylic resin, polyisoprene, vinyl resin, epoxy resin, polyurethane resin, cellulose resin or perylene resin, etc.

[0195] The upper inorganic layer 175 may be located on the organic layer 173. The upper inorganic layer 175 may cover the organic layer 173. Although not shown in the figures, in some embodiments, the upper inorganic layer 175 may be in direct contact with the lower inorganic layer 171 in the non-display area NDA to form an inorganic-inorganic junction.

[0196] In some embodiments, each of the lower inorganic layer 171 and the upper inorganic layer 175 may be made of silicon nitride, aluminum nitride, zirconium nitride, titanium nitride, hafnium nitride, tantalum nitride, silicon oxide, aluminum oxide, titanium oxide, tin oxide, cerium oxide, silicon oxynitride (SiON), or lithium fluoride.

[0197] In some embodiments, each of the lower inorganic layer 171 and the upper inorganic layer 175 may be formed as a single layer, but is not limited thereto. At least one of the lower inorganic layer 171 and the upper inorganic layer 175 may have a structure in which multiple layers, each made of an inorganic material, are stacked (e.g., a multilayer structure).

[0198] In addition to the structure described above, the structure of the thin film encapsulation layer 170 can be modified in various ways.

[0199] In the following text, except Figures 5 to 7 In addition, further references will be made. Figures 12 to 17 To describe the color conversion substrate 30.

[0200] Figure 12 This is a plan view illustrating a schematic arrangement of a third color filter in a color conversion substrate of a display device according to one embodiment. Figure 13 This is a plan view illustrating a schematic arrangement of a first color filter in a color conversion substrate of a display device according to one embodiment. Figure 14 This is a plan view illustrating a schematic arrangement of a second color filter in a color conversion substrate of a display device according to one embodiment. Figure 15 This is a plan view illustrating a schematic arrangement of a dam pattern in a color conversion substrate of a display device according to one embodiment. Figure 16 This is a plan view illustrating a schematic arrangement of optical patterns and columnar spacers in a color conversion substrate of a display device according to one embodiment. Figure 17 This is a plan view illustrating a schematic arrangement of a first wavelength conversion pattern, a second wavelength conversion pattern, and a light transmission pattern in a color conversion substrate of a display device according to one embodiment.

[0201] Apart from Figures 5 to 7 In addition, further reference Figures 12 to 17 , Figures 5 to 7 The second base 310 shown in the figure can be made of a light-transmitting material.

[0202] In some embodiments, the second base 310 may include a glass substrate or a plastic substrate. In some embodiments, the second base 310 may further include a separate layer (e.g., an insulating layer such as an inorganic layer) located on the glass substrate or plastic substrate.

[0203] As described above, in some embodiments, a plurality of light-transmitting areas TA1, TA2 and TA3 and a light-shielding area BA may be defined in the second base 310.

[0204] like Figures 5 to 7 and Figure 12 As shown, the third color filter 235 can be located on one surface of the second base 310 facing the display substrate 10.

[0205] The third color filter 235 can be set to overlap with the third light-transmitting zone TA3.

[0206] The third color filter 235 can selectively transmit light of a third color (e.g., blue light) and can block or absorb light of a first color (e.g., red light) and a second color (e.g., green light). In some embodiments, the third color filter 235 may be a blue color filter and may include a blue colorant such as a blue dye or blue pigment. In this disclosure, the colorant is a concept that includes both dyes and pigments.

[0207] The third color filter 235 can be configured to further overlap with the non-emissive region NLA or the shading region BA.

[0208] The portion of the third color filter 235 that overlaps with the light-shielding area BA can absorb a portion of the light flowing into the display device 1 from the outside, thereby reducing reflected light caused by external light. A large portion of the external light is reflected, leading to a problem of color reproduction distortion in the display device 1. However, according to this embodiment, when the third color filter 235 is further located in the non-emissive area NLA and the non-display area NDA, color distortion caused by the reflection of external light can be reduced.

[0209] When the third color filter 235 includes a blue colorant, external light or reflected light that has passed through the third color filter 235 can be blue light. The color sensitivity perceived by the user's eye depends on the color of the light. More specifically, light in the blue band may be perceived by the user less sensitively compared to light in the green band and red band. Therefore, since the third color filter 235 including the blue colorant is further configured to overlap with the light-shielding area BA, the user can perceive reflected light relatively less sensitively.

[0210] like Figures 5 to 7 , Figure 13 and Figure 14 As shown, the first color filter 231 and the second color filter 233 can be located on one surface of the second base 310 facing the display substrate 10.

[0211] The first color filter 231 can be configured to overlap with the first emission region LA1 or the first light transmission region TA1.

[0212] In some embodiments, the first color filter 231 can block or absorb a third color of light (e.g., blue light). That is, the first color filter 231 can function as a blue light blocking filter to block blue light. In some embodiments, the first color filter 231 can selectively transmit a first color of light (e.g., red light) and can block or absorb a third color of light (e.g., blue light) and a second color of light (e.g., green light). For example, the first color filter 231 can be a red color filter and can include a red colorant.

[0213] The first color filter 231 can be configured to further overlap with the non-emissive region NLA or the light-shielding region BA, and in the light-shielding region BA, the first color filter 231 can be located on the third color filter 235.

[0214] The second color filter 233 can block or absorb light of a third color (e.g., blue light). That is, the second color filter 233 can also be used as a blue light blocking filter. In some embodiments, the second color filter 233 can selectively transmit light of a second color (e.g., green light) and can block or absorb light of a third color (e.g., blue light) and light of a first color (e.g., red light). For example, the second color filter 233 can be a green color filter and can include a green colorant.

[0215] The second color filter 233 can be configured to further overlap with the non-emissive region NLA or the light-shielding region BA, and in the light-shielding region BA, the second color filter 233 can be located on the first color filter 231.

[0216] The dam pattern 370 may be located on a surface of the color filter (e.g., the second color filter 233) facing the display substrate 10 within the light-shielding area BA. In some embodiments, the dam pattern 370 may be located directly on a surface of the second color filter 233 and may be in direct contact with the second color filter 233.

[0217] In some embodiments, the embankment pattern 370 may be configured to overlap with the non-emitting region NLA. In some embodiments, such as Figure 15 As shown, the embankment pattern 370 can surround the first light-transmitting area TA1, the second light-transmitting area TA2, and the third light-transmitting area TA3 in a plan view. The embankment pattern 370 can divide the space in which the first wavelength conversion pattern 340, the second wavelength conversion pattern 350, and the light transmission pattern 330 are disposed.

[0218] In some embodiments, such as Figure 15 As shown, the embankment pattern 370 can be formed as a single, integrally connected pattern, but is not limited thereto. In another embodiment, the portions of the embankment pattern 370 surrounding the first light-transmitting area TA1, the portions of the embankment pattern 370 surrounding the second light-transmitting area TA2, and the portions of the embankment pattern 370 surrounding the third light-transmitting area TA3 can be formed as separate patterns.

[0219] When the first wavelength conversion pattern 340, the second wavelength conversion pattern 350, and the light transmission pattern 330 are formed by a method of ejecting the ink composition using a nozzle or the like (i.e., inkjet printing), the dam pattern 370 can be used as a guide to stably position the ejected ink composition at a desired location. That is, the dam pattern 370 can be used as a barrier wall.

[0220] In some embodiments, the embankment pattern 370 may overlap with the pixel-defining layer 150.

[0221] In some embodiments, the dam pattern 370 may include a photocurable organic material. Additionally, in some embodiments, the dam pattern 370 may include a photocurable organic material that also includes a light-shielding material. When the dam pattern 370 has light-shielding properties, it can prevent light from intruding between adjacent emitting regions in the display area DA. For example, the dam pattern 370 can prevent emitted light LE from the second light-emitting element ED2 from incident on the first wavelength conversion pattern 340 overlapping with the first emitting region LA1. Furthermore, the dam pattern 370 can block or prevent external light from penetrating into components located below the non-emitting region NLA.

[0222] The first optical pattern LR1 can be located on the first color filter 231, the second optical pattern LR2 can be located on the second color filter 233, and the third optical pattern LR3 can be located on the third color filter 235. The first optical pattern LR1 can overlap with the first light-transmitting area TA1, the second optical pattern LR2 can overlap with the second light-transmitting area TA2, and the third optical pattern LR3 can overlap with the third light-transmitting area TA3.

[0223] The first optical pattern LR1, the second optical pattern LR2, and the third optical pattern LR3 may be located in the space defined by the embankment pattern 370. In some embodiments, the first optical pattern LR1, the second optical pattern LR2, and the third optical pattern LR3 may be in direct contact with the embankment pattern 370.

[0224] In some embodiments, the height of each optical pattern may be less than the height of the embankment pattern 370. For example, as... Figure 11 As shown, the height THB of the embankment pattern 370, measured from one surface 310s of the second base 310, can be greater than the height THL of the first optical pattern LR1, measured from this same surface 310s of the second base 310.

[0225] In some embodiments, the height of each optical pattern can vary depending on the region. For example, as... Figure 11 As shown, the height THL of the first optical pattern LR1 can increase as the distance from the embankment pattern 370 decreases.

[0226] In some embodiments, one surface of each optical pattern may include a curved surface. In some embodiments, such as Figure 11 As shown, one surface LR1s of the first optical pattern LR1 facing the first wavelength conversion pattern 340 may have a lens shape. For example, this surface LR1s of the first optical pattern LR1 may have a concave shape that curves toward the second base 310.

[0227] The descriptions of the height and surface shape of the second optical pattern LR2 and the third optical pattern LR3 are substantially the same as those of the first optical pattern LR1, and therefore will be omitted.

[0228] In some embodiments, the first optical pattern LR1, the second optical pattern LR2, and the third optical pattern LR3 may be made of the same material and may be formed simultaneously in the same process. In some embodiments, the first optical pattern LR1, the second optical pattern LR2, and the third optical pattern LR3 may be formed of a material with a low refractive index.

[0229] In some embodiments, the refractive index of the first optical pattern LR1 may be lower than the refractive index of the first wavelength conversion pattern 340, which will be described later. For example, the refractive index of the first optical pattern LR1 may be more than 0.2 or more than 0.3 lower than the refractive index of the first wavelength conversion pattern 340.

[0230] Similarly, the refractive index of the second optical pattern LR2 may be lower than that of the second wavelength conversion pattern 350, which will be described later. For example, the refractive index of the second optical pattern LR2 may be more than 0.2 or more than 0.3 lower than that of the second wavelength conversion pattern 350.

[0231] Furthermore, the refractive index of the third optical pattern LR3 may be lower than that of the light transmission pattern 330, which will be described later. For example, the refractive index of the third optical pattern LR3 may be more than 0.2 or more than 0.3 lower than that of the light transmission pattern 330.

[0232] In some embodiments, the refractive indices of the first optical pattern LR1, the second optical pattern LR2, and the third optical pattern LR3 may be greater than or equal to about 1.1 and less than 1.4, greater than or equal to about 1.15 and less than about 1.3, or greater than or equal to about 1.2 and less than about 1.3.

[0233] In some embodiments, the respective optical patterns can recycle a portion of the light supplied from the display substrate 10. For example, the first optical pattern LR1 can reflect a portion of the light emitted toward the second substrate 310 that has not undergone light conversion in the first wavelength conversion pattern 340 back to the first wavelength conversion pattern 340. Since the refractive index of the first optical pattern LR1 is less than that of the first wavelength conversion pattern 340, the critical angle for total internal reflection can be reduced, and correspondingly, the amount of light with an incident angle greater than the critical angle can be increased. Light with an incident angle greater than the critical angle is totally internally reflected, and as a result, light from one surface LR1s of the first optical pattern LR1 (see...) is reflected back to the first wavelength conversion pattern 340. Figure 11 The amount of reflected light can be increased. Additionally, due to the first optical pattern LR1, one surface LR1s (see...) Figure 11The recessed shape of the first optical pattern LR1 allows for an increase in the amount of light recirculated to the first wavelength conversion pattern 340. Furthermore, since the first optical pattern LR1 can cover a portion of the side surface of the embankment pattern 370, it can reflect back to the first wavelength conversion pattern 340 any light emitted towards the embankment pattern 370 that has not undergone light conversion in the first wavelength conversion pattern 340. Therefore, the amount of recirculated light can be further increased, and as a result, the light utilization efficiency of the display device 1 can be further improved.

[0234] As described above, the second optical pattern LR2 can improve the light utilization efficiency in the second light-transmitting region TA2, and the third optical pattern LR3 can improve the light utilization efficiency in the third light-transmitting region TA3.

[0235] In some embodiments, the refractive index of the first optical pattern LR1 may be less than the refractive index of the first wavelength conversion pattern 340 and also less than the refractive index of the first color filter 231. Additionally, the refractive index of the second optical pattern LR2 may be less than the refractive index of the second wavelength conversion pattern 350 and also less than the refractive index of the second color filter 233. The refractive index of the third optical pattern LR3 may be less than the refractive index of the light transmission pattern 330 and also less than the refractive index of the third color filter 235.

[0236] Since the refractive index of each color filter is greater than that of each optical pattern, the light passing through each optical pattern and incident on each color filter can have a relatively improved straightness, thereby improving the light output efficiency of the display device 1.

[0237] In some embodiments, the various optical patterns may include inorganic particles. For example, such as... Figure 10 As shown, the second optical pattern LR2 may include a plurality of particles P and a resin R in which the plurality of particles P are dispersed.

[0238] In some embodiments, resin R may comprise a polymeric material. For example, resin R may comprise any one or a combination of polymeric materials selected from the group consisting of acrylic polymeric materials, silicone polymeric materials, polyurethane polymeric materials, and imide polymeric materials. Alternatively, resin R may comprise at least one of a siloxane polymer, a silsesquioxane polymer, a fluorine-substituted acrylic polymer, a fluorine-substituted silicone polymer, a fluorine-substituted urethane polymer, and a fluorine-substituted imide polymer. In some embodiments, resin R may be formed from an acrylic resin, a silicone resin, a polyurethane resin, or an imide resin. Resin R may be formed by curing a polymeric resin such as an acrylic resin, a silicone resin, a polyurethane resin, or an imide resin in a high-temperature process or an ultraviolet treatment process.

[0239] In some embodiments, resin R may be photosensitive.

[0240] In some embodiments, particle P may be made of inorganic materials. For example, particle P may be at least one of zinc oxide (ZnO) particles, titanium dioxide (TiO2) particles, magnesium fluoride (MgF2) particles, iron oxide (Fe3O4) particles, hollow silica particles, non-hollow silica particles, nano-silicate particles, and pore-forming agent particles. In some embodiments, when particle P is a hollow particle with an internally hollow structure, particle P may have a diameter of 20 nm to 200 nm and a shell thickness of 5 nm to 20 nm. Furthermore, the diameter of the hollow structure may be determined based on the shell thickness and the diameter of particle P. The refractive index of the first optical pattern LR1, the second optical pattern LR2, and the third optical pattern LR3 can be adjusted by adjusting the shell thickness and the diameter of particle P.

[0241] In some embodiments, two or more types of particles P with different diameters can be dispersed in resin R.

[0242] As described above, since the first optical pattern LR1 and the third optical pattern LR3 are made of the same material as the second optical pattern LR2, they may also include resin R and particles P.

[0243] like Figure 7 and Figure 16 As shown, the columnar spacer CS can be located on the embankment pattern 370. As described above, the columnar spacer CS can maintain a constant gap between the display substrate 10 and the color conversion substrate 30.

[0244] In some embodiments, the columnar spacer CS may be located directly on the embankment pattern 370 and may be in direct contact with the embankment pattern 370.

[0245] In some embodiments, the columnar spacer CS may be made of the same material as the first optical pattern LR1, the second optical pattern LR2 and the third optical pattern LR3, and may be formed simultaneously by the same process as the first optical pattern LR1, the second optical pattern LR2 and the third optical pattern LR3 (e.g., photoresist process, etc.).

[0246] Since the columnar spacer CS is made of the same material as the first optical pattern LR1, the second optical pattern LR2, and the third optical pattern LR3, in some embodiments, the refractive index of the columnar spacer CS can be the same as the refractive index of the first optical pattern LR1, and can be lower than the refractive index of the first wavelength conversion pattern 340, the second wavelength conversion pattern 350, and the light transmission pattern 330. In some embodiments, the refractive index of the columnar spacer CS can be about 1.1 or more and about 1.4 or less, about 1.15 or more and about 1.3 or less, or about 1.2 or more and about 1.3 or less. Additionally, when the optical pattern includes... Figure 11 When resin R and particles P are shown, columnar spacer CS may also include resin R and particles P.

[0247] like Figures 5 to 7 as well as Figure 17 As shown, the first wavelength conversion pattern 340, the second wavelength conversion pattern 350, and the light transmission pattern 330 may be located in the space divided by the embankment pattern 370. In some embodiments, the first wavelength conversion pattern 340, the second wavelength conversion pattern 350, and the light transmission pattern 330 may be located in the display area DA.

[0248] The light transmission pattern 330 may overlap with the third emitting region LA3 or the third light-emitting element ED3. The light transmission pattern 330 may be located in the third light-transmitting region TA3, in the space divided by the embankment pattern 370, and may be located on the third optical pattern LR3.

[0249] In some embodiments, such as Figure 17 As shown, the light transmission pattern 330 can be formed as an island-shaped pattern.

[0250] The light transmission pattern 330 can transmit incident light. As described above, the emitted light LE provided from the third light-emitting element ED3 can be blue light. The blue emitted light LE passes through the light transmission pattern 330 and the third color filter 235 and is emitted to the outside of the display device 1. That is, the third emitted light L3 emitted from the third emission area LA3 to the outside of the display device 1 can be blue light.

[0251] In some embodiments, the light transmission pattern 330 may include a first substrate resin 331, and may further include a first scatterer 333 dispersed in the first substrate resin 331.

[0252] The first base resin 331 may be made of a material with high light transmittance. In some embodiments, the first base resin 331 may be formed of an organic material. For example, the first base resin 331 may include organic materials such as epoxy resin, acrylic resin, cardo resin, or imide resin.

[0253] The first scatterer 333 may have a refractive index different from that of the first substrate resin 331 and form an optical interface with the first substrate resin 331. For example, the first scatterer 333 may be a light-scattering particle. The first scatterer 333 is not particularly limited, as long as it is a material capable of scattering at least a portion of the transmitted light, but it may be, for example, a metal oxide particle or an organic particle. Examples of metal oxides may include titanium oxide (TiO2), zirconium oxide (ZrO2), aluminum oxide (Al2O3), indium oxide (In2O3), zinc oxide (ZnO), and tin oxide (SnO2). Examples of organic particle materials may include acrylic resin and polyurethane resin. The first scatterer 333 may scatter light in random directions without substantially changing the wavelength of the light passing through the light transmission pattern 330, regardless of the incident direction of the incident light.

[0254] In some embodiments, the light transmission pattern 330 may be in direct contact with the third optical pattern LR3 and the embankment pattern 370.

[0255] As described above, the refractive index of the light transmission pattern 330 can be greater than the refractive index of the third optical pattern LR3, and in some embodiments, the refractive index of the light transmission pattern 330 can be 0.2 or more or 0.3 or more greater than the refractive index of the third optical pattern LR3. In some embodiments, when the refractive index of the third optical pattern LR3 is more than about 1.1 and less than about 1.4, more than about 1.15 and less than about 1.3, or more than about 1.2 and less than about 1.3, the refractive index of the light transmission pattern 330 can be from 1.7 to 1.9.

[0256] The first wavelength conversion pattern 340 may be located on the first optical pattern LR1 and may overlap with the first emission region LA1, the first light-emitting element ED1, or the first light-transmitting region TA1.

[0257] In some embodiments, the first wavelength conversion pattern 340 may be located in the first light-transmitting region TA1, in the space divided by the embankment pattern 370.

[0258] In some embodiments, such as Figure 17 As shown, the first wavelength conversion pattern 340 can be formed as an island-shaped pattern.

[0259] In some embodiments, the first wavelength conversion pattern 340 may be in direct contact with the first optical pattern LR1 and the embankment pattern 370.

[0260] The first wavelength conversion pattern 340 can emit light by converting or shifting the peak wavelength of the incident light to another specific peak wavelength. In some embodiments, the first wavelength conversion pattern 340 can convert the emitted light LE provided from the first light-emitting element ED1 into red light having a peak wavelength in the range of 610 nm to 650 nm, and can emit red light.

[0261] In some embodiments, the first wavelength conversion pattern 340 may include a second substrate resin 341 and a first wavelength shifter 345 dispersed in the second substrate resin 341, and may further include a second scatterer 343 dispersed in the second substrate resin 341.

[0262] The second base resin 341 may be made of a material with high light transmittance. In some embodiments, the second base resin 341 may be formed of an organic material. In some embodiments, the second base resin 341 may be made of the same material as the first base resin 331, or may include at least one of the materials exemplified as constituent materials of the first base resin 331.

[0263] The first wavelength shifter 345 can convert or shift the peak wavelength of the incident light to another specific peak wavelength. In some embodiments, the first wavelength shifter 345 can convert the emitted light LE (which is blue light) of a third color provided from the first light-emitting element ED1 into red light having a single peak wavelength in the range of 610 nm to 650 nm, and can emit red light.

[0264] Examples of the first wavelength shifter 345 may include quantum dots, quantum rods, or phosphors. For example, a quantum dot may be a particulate material that emits light of a specific color when an electron transitions from the conduction band to the valence band.

[0265] Quantum dots can be semiconductor nanocrystal materials. Quantum dots can have specific band gaps depending on their composition and size. Therefore, quantum dots can absorb light and then emit light with an inherent wavelength. Examples of semiconductor nanocrystals containing quantum dots can include group IV nanocrystals, group IV compound nanocrystals, group II-VI compound nanocrystals, group III-V compound nanocrystals, group IV-VI compound nanocrystals, or combinations thereof.

[0266] Group II-VI compounds can be selected from the group consisting of binary, ternary, and quaternary compounds. Specifically, binary compounds are selected from the group consisting of CdSe, CdTe, ZnS, ZnSe, ZnTe, ZnO, HgS, HgSe, HgTe, MgSe, MgS, and mixtures thereof; and ternary compounds are selected from the group consisting of AgInS, CuInS, CdSeS, CdSeTe, CdSTe, ZnSeS, ZnSeTe, ZnSTe, HgSeS, HgSeTe, and HgS. The quaternary compound is selected from the group consisting of Te, CdZnS, CdZnSe, CdZnTe, CdHgS, CdHgSe, CdHgTe, HgZnS, HgZnSe, HgZnTe, MgZnSe, MgZnS and mixtures thereof, and the quaternary compound is selected from the group consisting of HgZnTeS, CdZnSeS, CdZnSeTe, CdZnSTe, CdHgSeS, CdHgSeTe, CdHgSTe, HgZnSeS, HgZnSeTe and mixtures thereof.

[0267] III-V group compounds can be selected from the group consisting of binary, ternary and quaternary compounds, wherein the binary compounds are selected from the group consisting of GaN, GaP, GaAs, GaSb, AlN, AlP, AlAs, AlSb, InN, InP, InAs, InSb and mixtures thereof; the ternary compounds are selected from the group consisting of GaNP, GaNAs, GaNSb, GaPAs, GaPSb, AlNP, AlNAs, AlNSb, AlPAs, AlPSb, InGaP, InNP, InAlP, InNAs, InNSb, InPAs, InPSb and mixtures thereof; and the quaternary compounds are selected from the group consisting of GaAlNP, GaAlNAs, GaAlNSb, GaAlPAs, GaAlPSb, GaInNP, GaInNAs, GaInNSb, GaInPAs, GaInPSb, InAlNP, InAlNAs, InAlNSb, InAlPAs, InAlPSb and mixtures thereof.

[0268] Group IV-VI compounds can be selected from the group consisting of binary, ternary, and quaternary compounds. Binary compounds are selected from the group consisting of SnS, SnSe, SnTe, PbS, PbSe, PbTe, and mixtures thereof; ternary compounds are selected from the group consisting of SnSeS, SnSeTe, SnSTe, PbSeS, PbSeTe, PbSTe, SnPbS, SnPbSe, SnPbTe, and mixtures thereof; and quaternary compounds are selected from the group consisting of SnPbSSe, SnPbSeTe, SnPbSTe, and mixtures thereof. Group IV elements can be selected from the group consisting of Si, Ge, and mixtures thereof. Group IV compounds can be binary compounds selected from the group consisting of SiC, SiGe, and mixtures thereof.

[0269] In this context, binary, ternary, or quaternary compounds can exist in the particles at a uniform concentration, or they can exist within the same particle by being partitioned into states in which the concentration distributions are partially different. Furthermore, the particles can have a core / shell structure with one quantum dot surrounding another. The interface between the core and shell can have a concentration gradient in which the concentration of elements present in the shell decreases towards the center.

[0270] In some embodiments, the quantum dot may have a core / shell structure comprising a core containing the aforementioned nanocrystals and a shell surrounding the core. The shell of the quantum dot may serve as a protective layer to maintain semiconductor properties by preventing chemical denaturation of the core and / or as a charging layer to impart electrophoretic properties to the quantum dot. The shell may be monolayer or multilayer. The interface between the core and the shell may have a concentration gradient in which the concentration of elements present in the shell decreases toward the center. Examples of shells for quantum dots may include metal or nonmetal oxides, semiconductor compounds, and combinations thereof.

[0271] For example, the metal or non-metal oxide can be a binary compound such as SiO2, Al2O3, TiO2, ZnO, MnO, Mn2O3, Mn3O4, CuO, FeO, Fe2O3, Fe3O4, CoO, Co3O4 and NiO, or a ternary compound such as MgAl2O4, CoFe2O4, NiFe2O4 and CoMn2O4, but the present invention is not limited thereto.

[0272] In addition, the semiconductor compound may be, for example, CdS, CdSe, CdTe, ZnS, ZnSe, ZnTe, ZnSeS, ZnTeS, GaAs, GaP, GaSb, HgS, HgSe, HgTe, InAs, InP, InGaP, InSb, AlAs, AlP, or AlSb, but the present invention is not limited thereto.

[0273] The light emitted from the first wavelength shifter 345 can have a full width at half maximum (FWHM) of an emission wavelength spectrum of about 45 nm or less, about 40 nm or less, or about 30 nm or less. Therefore, the purity and reproducibility of the colors displayed by the display device 1 can be further improved. Furthermore, regardless of the incident direction of the incident light, the light emitted from the first wavelength shifter 345 can be emitted in various directions. Accordingly, the lateral visibility of the first color displayed in the first light-transmitting area TA1 can be improved.

[0274] A portion of the emitted light LE provided by the first light-emitting element ED1 can pass through the first wavelength conversion pattern 340 and be emitted without being converted into red light by the first wavelength shifter 345. The component of the emitted light LE that is not converted by the first wavelength conversion pattern 340 and incident on the first color filter 231 can be blocked by the first color filter 231. On the other hand, the emitted light LE that has been converted into red light by the first wavelength conversion pattern 340 passes through the first color filter 231 and is emitted to the outside. That is, the first emitted light L1 emitted to the outside of the display device 1 through the first light-transmitting area TA1 can be red light.

[0275] The second scatterer 343 may have a refractive index different from that of the second substrate resin 341 and form an optical interface with the second substrate resin 341. For example, the second scatterer 343 may be a light-scattering particle. A more detailed description of the second scatterer 343 is substantially the same as or similar to the description of the first scatterer 333, and will therefore be omitted.

[0276] As described above, the refractive index of the first wavelength conversion pattern 340 can be greater than the refractive index of the first optical pattern LR1, and in some embodiments, the refractive index of the first wavelength conversion pattern 340 can be 0.2 or more or 0.3 or more greater than the refractive index of the first optical pattern LR1. In some embodiments, when the refractive index of the first optical pattern LR1 is about 1.1 or more and about 1.4 or less, about 1.15 or more and about 1.3 or less, or about 1.2 or more and about 1.3 or less, the refractive index of the first wavelength conversion pattern 340 can be 1.7 to 1.9.

[0277] By configuring the refractive index difference between the first optical pattern LR1 and the first wavelength conversion pattern 340 to be relatively large, total internal reflection can easily occur on one surface of the first optical pattern LR1 facing the first wavelength conversion pattern 340. That is, the amount of light reflected from one surface of the first optical pattern LR1 toward the first wavelength conversion pattern 340 can be increased, and correspondingly, the light utilization efficiency can be improved.

[0278] The second wavelength conversion pattern 350 can be located in the second light-transmitting area TA2, in the space divided by the embankment pattern 370.

[0279] In some embodiments, such as Figure 17 As shown, the second wavelength conversion pattern 350 can be formed as an island-shaped pattern.

[0280] In some embodiments, the second wavelength conversion pattern 350 may be in direct contact with the second optical pattern LR2 and the embankment pattern 370.

[0281] The second wavelength conversion pattern 350 can emit light by converting or shifting the peak wavelength of the incident light to another specific peak wavelength. In some embodiments, the second wavelength conversion pattern 350 can convert the emitted light LE provided from the second light-emitting element ED2 into green light having a peak wavelength in the range of about 510 nm to about 550 nm and emit green light.

[0282] In some embodiments, the second wavelength conversion pattern 350 may include a third substrate resin 351 and a second wavelength shifter 355 dispersed in the third substrate resin 351, and may further include a third scatterer 353 dispersed in the third substrate resin 351.

[0283] The third base resin 351 may be made of a material with high light transmittance. In some embodiments, the third base resin 351 may be formed of an organic material. In some embodiments, the third base resin 351 may be made of the same material as the first base resin 331, or may include at least one of the materials exemplified as constituent materials of the first base resin 331.

[0284] The second wavelength shifter 355 can convert or shift the peak wavelength of the incident light to another specific peak wavelength. In some embodiments, the second wavelength shifter 355 can convert blue light having a peak wavelength in the range of 440 nm to 480 nm into green light having a peak wavelength in the range of 510 nm to 550 nm.

[0285] Examples of the second wavelength shifter 355 may include quantum dots, quantum rods, and phosphors. A more detailed description of the second wavelength shifter 355 is substantially the same as or similar to the description of the first wavelength shifter 345, and will therefore be omitted.

[0286] In some embodiments, both the first wavelength shifter 345 and the second wavelength shifter 355 can be formed of quantum dots. In this case, the particle size of the quantum dots constituting the second wavelength shifter 355 can be smaller than the particle size of the quantum dots constituting the first wavelength shifter 345.

[0287] The third scatterer 353 may have a refractive index different from that of the third substrate resin 351 and form an optical interface with the third substrate resin 351. For example, the third scatterer 353 may be a light-scattering particle. A more detailed description of the third scatterer 353 is substantially the same as or similar to the description of the second scatterer 343, and will therefore be omitted.

[0288] The emitted light LE from the second light-emitting element ED2 can be provided to the second wavelength conversion pattern 350, and the second wavelength shifter 355 can convert the emitted light LE provided from the second light-emitting element ED2 into green light having a peak wavelength in the range of about 510 nm to about 550 nm, and can emit green light.

[0289] A portion of the blue emitted light LE can pass through the second wavelength conversion pattern 350 without being converted into green light by the second wavelength shifter 355, and can then be blocked by the second color filter 233. On the other hand, the emitted light LE converted into green light by the second wavelength conversion pattern 350 passes through the second color filter 233 and is emitted to the outside. Accordingly, the second emitted light L2 emitted from the second light-transmitting area TA2 to the outside of the display device 1 can be green light.

[0290] As described above, the refractive index of the second wavelength conversion pattern 350 can be greater than the refractive index of the second optical pattern LR2, and in some embodiments, the refractive index of the second wavelength conversion pattern 350 can be 0.2 or more or 0.3 or more greater than the refractive index of the second optical pattern LR2. In some embodiments, when the refractive index of the second optical pattern LR2 is about 1.1 or more and about 1.4 or less, about 1.15 or more and about 1.3 or less, or about 1.2 or more and about 1.3 or less, the refractive index of the second wavelength conversion pattern 350 can be 1.7 to 1.9.

[0291] The second capping layer 393 may be located on the embankment pattern 370, the columnar spacer CS, the light transmission pattern 330, the first wavelength conversion pattern 340, and the second wavelength conversion pattern 350. The second capping layer 393 may cover the light transmission pattern 330, the first wavelength conversion pattern 340, and the second wavelength conversion pattern 350. In addition, the second capping layer 393 may cover the columnar spacer CS.

[0292] In some embodiments, the second cover layer 393 may also be located in the non-display area NDA (see...). Figure 1 In the non-display area NDA (see...) Figure 1In this structure, the second capping layer 393 can directly contact the second base 310 and can seal the light transmission pattern 330, the first wavelength conversion pattern 340, and the second wavelength conversion pattern 350. Accordingly, the second capping layer 393 can prevent contamination or damage to the light transmission pattern 330, the first wavelength conversion pattern 340, and the second wavelength conversion pattern 350 due to the infiltration of impurities such as moisture or air from the outside.

[0293] In some embodiments, the second capping layer 393 may be made of an inorganic material. For example, the second capping layer 393 may include silicon nitride, aluminum nitride, zirconium nitride, titanium nitride, hafnium nitride, tantalum nitride, silicon oxide, aluminum oxide, titanium oxide, tin oxide, cerium oxide, or silicon oxynitride, etc.

[0294] In some embodiments, the portion of the second capping layer 393 that overlaps with the columnar spacer CS can directly contact the thin-film encapsulation layer 170. For example, the portion of the second capping layer 393 that overlaps with the columnar spacer CS can contact the upper inorganic layer 175 of the thin-film encapsulation layer 170.

[0295] As described above, the filler 70 can be located in the space between the color conversion substrate 30 and the display substrate 10. In some embodiments, such as Figures 5 to 7 As shown, the filler 70 can be in direct contact with the second capping layer 393 and the thin film encapsulation layer 170.

[0296] Since the display device 1 according to the above embodiment includes a first optical pattern LR1, a second optical pattern LR2, and a third optical pattern LR3 having a refractive index lower than that of the first wavelength conversion pattern 340, the second wavelength conversion pattern 350, and the light transmission pattern 330, it has the advantage of improved light utilization efficiency. Furthermore, since the display device 1 includes a columnar spacer CS, the gap can be uniformly maintained in the display area DA, and therefore the thickness of the filler 70 can be uniformly maintained. Further, since the thickness of the filler 70 is uniformly maintained, potential degradation of display quality due to uneven thickness of the filler 70 can be prevented.

[0297] Furthermore, since the first optical pattern LR1, the second optical pattern LR2, and the third optical pattern LR3 can be formed together in the process of forming the columnar spacer CS, it has the advantage of simplifying the manufacturing process.

[0298] Figure 18 The display device according to another embodiment is along Figure 3 and Figure 4 The cross-sectional view taken by line X3-X3'. Figure 19 The display device according to another embodiment is along Figure 3 and Figure 4The cross-sectional view taken from line X5-X5'. Figure 20 The display device according to another embodiment is along Figure 3 and Figure 4 The cross-sectional view taken from line X7-X7'.

[0299] refer to Figures 18 to 20 The display device 1_1 according to this embodiment includes a display substrate 10, a color conversion substrate 30_1, and a filler 70. The display device 1_1 and... Figures 5 to 7 The most significant difference in the display device 1 of the embodiment lies in the configuration of the color conversion substrate 30_1, particularly in that the color conversion substrate 30_1 further includes a third capping layer 391. Other configurations are substantially the same or similar. Therefore, redundant descriptions will be omitted and the differences will be the primary focus.

[0300] The third capping layer 391 may be located on the first optical pattern LR1, the second optical pattern LR2, the third optical pattern LR3, and the embankment pattern 370. In some embodiments, the third capping layer 391 may be in direct contact with the first optical pattern LR1, the second optical pattern LR2, the third optical pattern LR3, and the embankment pattern 370.

[0301] The columnar spacer CS can be made of the same material as the first optical pattern LR1, the second optical pattern LR2, and the third optical pattern LR3, and can be formed simultaneously using the same process. Accordingly, the third capping layer 391 can also cover the columnar spacer CS. In other words, the columnar spacer CS can be located between the embankment pattern 370 and the third capping layer 391.

[0302] The third sealing layer 391 can prevent contamination or damage to the first color filter 231, the second color filter 233, the third color filter 235, etc., due to the infiltration of impurities such as moisture or air from the outside.

[0303] In some embodiments, the third capping layer 391 may be made of an inorganic material. In some embodiments, the third capping layer 391 may be made of the same material as the second capping layer 393, or may include at least one of the materials mentioned in the description of the second capping layer 393.

[0304] The first wavelength conversion pattern 340, the second wavelength conversion pattern 350, and the light transmission pattern 330 may be located on the third capping layer 391. In some embodiments, the first wavelength conversion pattern 340, the second wavelength conversion pattern 350, and the light transmission pattern 330 may be in direct contact with the third capping layer 391.

[0305] The second capping layer 393 may be located on the embankment pattern 370, the light transmission pattern 330, the first wavelength conversion pattern 340, and the second wavelength conversion pattern 350. In some embodiments, the second capping layer 393 may be in direct contact with the third capping layer 391 in the light-shielding area BA.

[0306] In addition, the various configurations of display device 1_1 can be referenced above. Figures 1 to 17 The configuration of the described display device 1 is basically the same.

[0307] Figure 21 The display device according to yet another embodiment Figure 3 and Figure 4 The cross-sectional view taken by line X3-X3'. Figure 22 The display device according to yet another embodiment Figure 3 and Figure 4 The cross-sectional view taken from line X5-X5'. Figure 23 The display device according to yet another embodiment Figure 3 and Figure 4 The cross-sectional view taken from line X7-X7'.

[0308] refer to Figures 21 to 23 The display device 1_2 according to this embodiment includes a display substrate 10, a color conversion substrate 30_2, and a filler 70. The display device 1_2 and... Figures 5 to 7 The most significant difference in the display device 1 of the embodiment lies in the configuration of the color conversion substrate 30_2, particularly the configuration of the first optical pattern LR1_1, the second optical pattern LR2_1, the third optical pattern LR3_1, and the columnar spacer CS_1 on the color conversion substrate 30_2. Other configurations are substantially the same or similar. Therefore, redundant descriptions will be omitted, and the main differences will be described.

[0309] Each of the first optical pattern LR1_1, the second optical pattern LR2_1, and the third optical pattern LR3_1 may include a raised pattern LRP protruding toward the first base 110 on one of its surfaces. In some embodiments, this can be achieved by dispersing particles P (see...) therein... Figure 10 Resin R (see) Figure 10 The LRP with raised patterns is formed by inducing a gelation reaction during the heat treatment (or baking) process.

[0310] In some embodiments, the number of raised pattern LRPs overlapping each light-transmitting region can be multiple. For example, multiple raised pattern LRPs overlapping the first light-transmitting region TA1 or the first wavelength conversion pattern 340 can be provided.

[0311] Since each optical pattern further includes a convex pattern LRP, the area of ​​the reflective interface of each optical pattern (e.g., a surface of the first optical pattern LR1_1 facing the first wavelength conversion pattern 340, a surface of the second optical pattern LR2_1 facing the second wavelength conversion pattern 350, and a surface of the third optical pattern LR3_1 facing the light transmission pattern 330) can be increased, and thus the amount of recycled light can be increased.

[0312] The columnar spacer CS_1 can be formed in the same process using the same material as the first optical pattern LR1_1, the second optical pattern LR2_1, and the third optical pattern LR3_1. Accordingly, in some embodiments, the columnar spacer CS_1 may further include a convex pattern CSP projecting toward the first base 110.

[0313] Figure 24 The display device according to yet another embodiment Figure 3 and Figure 4 The cross-sectional view taken by line X3-X3'. Figure 25 The display device according to yet another embodiment Figure 3 and Figure 4 The cross-sectional view taken from line X5-X5'. Figure 26 The display device according to yet another embodiment Figure 3 and Figure 4 The cross-sectional view taken from line X7-X7'.

[0314] refer to Figures 24 to 26 The display device 1_3 according to this embodiment includes a display substrate 10, a color conversion substrate 30_3, and a filler 70. The display device 1_3 and... Figures 21 to 23 The most significant difference between the display device 1_2 in the embodiment is that the color conversion substrate 30_3 further includes a third cover layer 391. Other configurations are substantially the same or similar. Therefore, redundant descriptions will be omitted and the main differences will be described.

[0315] The third capping layer 391 may be located on the first optical pattern LR1_1, the second optical pattern LR2_1, and the third optical pattern LR3_1, and may further cover the convex pattern LRP. In addition, when the columnar spacer CS_1 further includes the convex pattern CSP, the third capping layer 391 may further cover the convex pattern CSP of the columnar spacer CS_1.

[0316] A more detailed description of the third capping layer 391 will be omitted because it is consistent with the reference. Figures 18 to 20 The above description is the same.

[0317] Figure 27 The display device according to yet another embodiment Figure 3 and Figure 4 The cross-sectional view taken by line X3-X3'. Figure 28 The display device according to yet another embodiment Figure 3 and Figure 4 The cross-sectional view taken from line X5-X5'. Figure 29 The display device according to yet another embodiment Figure 3 and Figure 4 The cross-sectional view taken from line X7-X7'. Figure 30 This is a plan view illustrating a schematic arrangement of optical patterns and columnar spacers in a color conversion substrate of a display device according to yet another embodiment.

[0318] refer to Figures 27 to 30 The display device 1_4 according to this embodiment includes a display substrate 10, a color conversion substrate 30_4, and a filler 70. The display device 1_4 and... Figures 5 to 7 The difference in the display device 1 of the embodiment lies in the configuration of the color conversion substrate 30_4, particularly in that the first opening OP1, the second opening OP2, and the third opening OP3 are further formed in the optical patterns LR1, LR2, and LR3 of the color conversion substrate 30_4. Other configurations are substantially the same or similar. Therefore, redundant descriptions will be omitted and the differences will be described primarily.

[0319] The first opening OP1, which overlaps with the first light-transmitting area TA1, can be defined in the first optical pattern LR1; the second opening OP2, which overlaps with the second light-transmitting area TA2, can be defined in the second optical pattern LR2; and the third opening OP3, which overlaps with the third light-transmitting area TA3, can be defined in the third optical pattern LR3.

[0320] In some embodiments, the first color filter 231 may be partially exposed through the first opening OP1, the second color filter 233 may be partially exposed through the second opening OP2, and the third color filter 235 may be partially exposed through the third opening OP3.

[0321] In some embodiments, a first wavelength conversion pattern 340 may be disposed in a first opening OP1, a second wavelength conversion pattern 350 may be disposed in a second opening OP2, and a light transmission pattern 330 may be disposed in a third opening OP3.

[0322] The first opening OP1 may overlap with the first emission region LA1. In some embodiments, in a plan view, as shown... Figure 30 As shown, the size of the first opening OP1 can be smaller than the size of the first emission region LA1, and the first opening OP1 can be completely surrounded by the edge of the first emission region LA1.

[0323] Similar to the first opening OP1, the second opening OP2 can overlap with the second emission region LA2. The size of the second opening OP2 can be smaller than the size of the second emission region LA2, and in the plan view, the second opening OP2 can be completely surrounded by the edge of the second emission region LA2.

[0324] In addition, the third opening OP3 can overlap with the third emission region LA3, the size of the third opening OP3 can be smaller than the size of the third emission region LA3, and in the plan view, the third opening OP3 can be completely surrounded by the edge of the third emission region LA3.

[0325] In some embodiments, in a plan view, the size of the first opening OP1, the second opening OP2, and the third opening OP3 may differ from the other three. For example, when the size of the first emission region LA1 and the second emission region LA2 are larger than the size of the third emission region LA3, the size of the third opening OP3 may be smaller than the size of the first opening OP1 and the second opening OP2.

[0326] By further providing a first opening OP1, a second opening OP2, and a third opening OP3, the component of external light incident on the display device 1_4 that is reflected from the surfaces of the first optical pattern LR1, the second optical pattern LR2, and the third optical pattern LR3 can be reduced. That is, by further providing the first opening OP1, the second opening OP2, and the third opening OP3, external light reflection occurring in the first optical pattern LR1, the second optical pattern LR2, and the third optical pattern LR3 can be reduced.

[0327] Furthermore, although the accompanying drawings illustrate the formation of a first opening OP1, a second opening OP2, and a third opening OP3, this is merely an example. In another example, two or more first openings OP1, second openings OP2, and third openings OP3 may be formed.

[0328] Figure 31 The display device according to yet another embodiment Figure 3 and Figure 4 The cross-sectional view taken by line X3-X3'. Figure 32 The display device according to yet another embodiment Figure 3 and Figure 4 The cross-sectional view taken from line X5-X5'. Figure 33 The display device according to yet another embodiment Figure 3 and Figure 4 The cross-sectional view taken from line X7-X7'.

[0329] refer to Figures 31 to 33The display device 1_5 according to this embodiment includes a display substrate 10, a color conversion substrate 30_5, and a filler 70. The display device 1_5 and... Figures 27 to 30 The most significant difference in the display device 1_4 of the embodiment is that the color conversion substrate 30_5 further includes a third cover layer 391. Other configurations are substantially the same or similar. Therefore, redundant descriptions will be omitted and the main differences will be described.

[0330] The third cover layer 391 may be located on the first optical pattern LR1, the second optical pattern LR2 and the third optical pattern LR3, and may cover the side surface of the first optical pattern LR1 that defines the first opening OP1, the side surface of the second optical pattern LR2 that defines the second opening OP2 and the side surface of the third optical pattern LR3 that defines the third opening OP3.

[0331] In some embodiments, the third cover layer 391 may contact the first color filter 231 exposed through the first opening OP1, the second color filter 233 exposed through the second opening OP2, and the third color filter 235 exposed through the third opening OP3.

[0332] A more detailed description of the third capping layer 391 will be omitted because it is consistent with the reference. Figures 18 to 20 The above description is the same.

[0333] Figure 34 The display device according to yet another embodiment Figure 3 and Figure 4 The cross-sectional view taken by line X3-X3'. Figure 35 The display device according to yet another embodiment Figure 3 and Figure 4 The cross-sectional view taken from line X5-X5'. Figure 36 The display device according to yet another embodiment Figure 3 and Figure 4 The cross-sectional view taken from line X7-X7'. Figure 37 This is a plan view illustrating a schematic arrangement of optical patterns and columnar spacers in a color conversion substrate of a display device according to yet another embodiment.

[0334] refer to Figures 34 to 37 The display device 2 according to this embodiment includes a display substrate 10, a color conversion substrate 31, and a filler 70. The display device 2 and... Figures 5 to 7 The most significant difference in the embodiment of the display device 1 is that the color conversion substrate 31 includes a first optical pattern HR1, a second optical pattern HR2, a third optical pattern HR3, and a columnar spacer CSS, and further includes a third capping layer 391, but does not include, as in the example, Figures 5 to 7 The first optical pattern LR1 shown (see Figure 5), second optical pattern LR2 (see Figure 5 ), third optical pattern LR3 (see Figure 6 ) and columnar spacers CS (see Figure 7 Other configurations are basically the same or similar. Therefore, redundant descriptions will be omitted and the main differences will be described.

[0335] A third capping layer 391 covering the first color filter 231, the second color filter 233, and the third color filter 235 may be disposed on a surface of the second base 310. In some embodiments, the third capping layer 391 may be in direct contact with the first color filter 231, the second color filter 233, and the third color filter 235.

[0336] The embankment pattern 370 may be located on one surface of the third cover layer 391 facing the display substrate 10. In some embodiments, the embankment pattern 370 may be located directly on one surface of the third cover layer 391 and may be in direct contact with the third cover layer 391.

[0337] The first wavelength conversion pattern 340, the second wavelength conversion pattern 350, and the light transmission pattern 330 may be located on the third capping layer 391. The first wavelength conversion pattern 340, the second wavelength conversion pattern 350, and the light transmission pattern 330 may be located within a space defined by the embankment pattern 370. In some embodiments, the first wavelength conversion pattern 340, the second wavelength conversion pattern 350, and the light transmission pattern 330 may be in contact with the third capping layer 391.

[0338] The second capping layer 393 may be located on the embankment pattern 370, the light transmission pattern 330, the first wavelength conversion pattern 340, and the second wavelength conversion pattern 350. The second capping layer 393 may cover the light transmission pattern 330, the first wavelength conversion pattern 340, and the second wavelength conversion pattern 350.

[0339] The first optical pattern HR1, the second optical pattern HR2, the third optical pattern HR3, and the columnar spacer CSS can be located on the second capping layer 393.

[0340] The first optical pattern HR1 may overlap with the first light-transmitting area TA1 or the first wavelength conversion pattern 340. The second optical pattern HR2 may overlap with the second light-transmitting area TA2 or the second wavelength conversion pattern 350, and the third optical pattern HR3 may overlap with the third light-transmitting area TA3 or the light transmission pattern 330.

[0341] In some embodiments, the first optical pattern HR1, the second optical pattern HR2, and the third optical pattern HR3 may have shapes protruding toward the display substrate 10, and the surfaces of the first optical pattern HR1, the second optical pattern HR2, and the third optical pattern HR3 facing the filler 70 may each include curved surfaces. In some embodiments, the surfaces of the first optical pattern HR1, the second optical pattern HR2, and the third optical pattern HR3 facing the filler 70 may each have a convex lens shape.

[0342] The first optical pattern HR1 may overlap with the first emission region LA1. In some embodiments, in a plan view, as shown Figure 37 As shown, the size of the first optical pattern HR1 can be smaller than the size of the first emission region LA1, and the edge of the first optical pattern HR1 can be completely surrounded by the edge of the first emission region LA1.

[0343] Similar to the first optical pattern HR1, the second optical pattern HR2 can overlap with the second emission region LA2. The size of the second optical pattern HR2 can be smaller than the size of the second emission region LA2, and in the planar view, the edge of the second optical pattern HR2 can be completely surrounded by the edge of the second emission region LA2.

[0344] In addition, the third optical pattern HR3 can overlap with the third emission region LA3, the size of the third optical pattern HR3 can be smaller than the size of the third emission region LA3, and in the planar view, the edge of the third optical pattern HR3 can be completely surrounded by the edge of the third emission region LA3.

[0345] In some embodiments, in a plan view, the size of the first optical pattern HR1, the size of the second optical pattern HR2, and the size of the third optical pattern HR3 may differ from the other one of them. For example, when the size of the first emission region LA1 and the second emission region LA2 is larger than the size of the third emission region LA3, the size of the first optical pattern HR1 and the size of the second optical pattern HR2 may be larger than the size of the third optical pattern HR3.

[0346] The first optical pattern HR1, the second optical pattern HR2, and the third optical pattern HR3 can be spaced apart from the thin-film encapsulation layer 170 of the display substrate 10. The filler 70 can be located between the thin-film encapsulation layer 170 and the first optical pattern HR1, the second optical pattern HR2, and the third optical pattern HR3. The first optical pattern HR1, the second optical pattern HR2, and the third optical pattern HR3 can be in direct contact with the filler 70, and can be spaced apart from the thin-film encapsulation layer 170 by the filler 70 therebetween.

[0347] In some embodiments, the first optical pattern HR1, the second optical pattern HR2, and the third optical pattern HR3 may be made of the same material and may be formed simultaneously in the same process. In some embodiments, the first optical pattern HR1, the second optical pattern HR2, and the third optical pattern HR3 may be formed of a material with a high refractive index.

[0348] In some embodiments, the refractive index of the first optical pattern HR1, the refractive index of the second optical pattern HR2, and the refractive index of the third optical pattern HR3 may be greater than the refractive index of the filler 70. For example, when the refractive index of the filler 70 is 1.4 to 1.7, the refractive index of the first optical pattern HR1 may be 1.8 to 2.5.

[0349] In some embodiments, the high refractive index material included in the first optical pattern HR1, the second optical pattern HR2, and the third optical pattern HR3 may be an organic material. For example, the first optical pattern HR1, the second optical pattern HR2, and the third optical pattern HR3 may include materials derived from poly(3,4-ethylenedioxythiophene) (PEDOT), 4,4'-bis[N-(3-methylphenyl)-N-phenylamino]biphenyl (TPD), 4,4',4”-tris[(3-methylphenyl)phenylamino]triphenylamine (m-MTDATA), 1,3,5-tris[N,N-bis(2-methylphenyl)-amino]benzene (o-MTDAB), 1,3,5-tris[N,N-bis(3-methylphenyl)-amino]benzene (m-MTDAB), and 1,3,5-tris[N,N-bis(4-methylphenyl)-amino]benzene (p-MTDAB). B) At least one high-refractive-index material selected from the group consisting of 4,4'-bis[N,N-bis(3-methylphenyl)-amino]-diphenylmethane (BPPM), 4,4'-dicarbazolyl-1,1'-biphenyl (CBP), 4,4',4”-tris(N-carbazolyl)triphenylamine (TCTA), 2,2',2”-(1,3,5-benzyltolyl)tri-[1-phenyl-1H-benzimidazole] (TPBI) and 3-(4-biphenyl)-4-phenyl-5-tert-butylphenyl-1,2,4-triazole (TAZ). In some embodiments, the high-refractive-index material included in the first optical pattern HR1, the second optical pattern HR2, and the third optical pattern HR3 may be photosensitizing.

[0350] However, this disclosure is not limited thereto. In addition, the high-refractive-index material included in the first optical pattern HR1, the second optical pattern HR2 and the third optical pattern HR3 may be a mixture of inorganic and organic materials, and when formed of organic materials, it may include materials other than those exemplified above.

[0351] As described above, the refractive indices of the first optical pattern HR1, the second optical pattern HR2, and the third optical pattern HR3 can be greater than the refractive index of the filler 70. Accordingly, when light LE provided from the display substrate 10 is incident on the first optical pattern HR1, the second optical pattern HR2, and the third optical pattern HR3 via the filler 70, the angle of refraction of the light can become smaller than its angle of incidence, and correspondingly, the straightness of the light can be relatively improved. Accordingly, the amount of light provided to the first wavelength conversion pattern 340, the second wavelength conversion pattern 350, and the light transmission pattern 330 can be increased, and as a result, the light efficiency of the display device 2 can be improved. In addition, since the first optical pattern HR1, the second optical pattern HR2, and the third optical pattern HR3 have a convex lens shape, the light can be more concentrated on the first wavelength conversion pattern 340, the second wavelength conversion pattern 350, and the light transmission pattern 330, and correspondingly, the amount of light provided to the first wavelength conversion pattern 340, the second wavelength conversion pattern 350, and the light transmission pattern 330 can be further increased.

[0352] like Figure 36 As shown, the columnar spacer CSS can be located on the second cover layer 393. As described above, the columnar spacer CSS can maintain a constant gap between the display substrate 10 and the color conversion substrate 31.

[0353] In some embodiments, the columnar spacer CSS can be directly located on and in direct contact with the second capping layer 393. Alternatively, the columnar spacer CSS can be in direct contact with the thin-film encapsulation layer 170 of the display substrate 10. For example, the columnar spacer CSS can be in direct contact with the upper inorganic layer 175 of the thin-film encapsulation layer 170.

[0354] In some embodiments, the columnar spacer CSS may be made of the same material as the first optical pattern HR1, the second optical pattern HR2, and the third optical pattern HR3, and may be formed simultaneously by the same process (e.g., photoresist) as the first optical pattern HR1, the second optical pattern HR2, and the third optical pattern HR3.

[0355] Since the columnar spacer CSS is made of the same material as the first optical pattern HR1, the second optical pattern HR2, and the third optical pattern HR3, in some embodiments, the refractive index of the columnar spacer CSS can be the same as the refractive index of the first optical pattern HR1, and can be greater than the refractive index of the filler 70. In some embodiments, the refractive index of the columnar spacer CSS can be more than about 1.8 and less than 2.5.

[0356] Since the display device 2 according to the above embodiment includes a first optical pattern HR1, a second optical pattern HR2, and a third optical pattern HR3 having a refractive index that is higher than that of the filler 70, it has the advantage of improved light utilization efficiency. In addition, since the first optical pattern HR1, the second optical pattern HR2, and the third optical pattern HR3 can be formed together in the process of forming the columnar spacer CSS, it has the advantage of simplifying the manufacturing process.

[0357] Figure 38 The display device according to yet another embodiment Figure 3 and Figure 4 The cross-sectional view taken by line X3-X3'. Figure 39 The display device according to yet another embodiment Figure 3 and Figure 4 The cross-sectional view taken from line X5-X5'. Figure 40 The display device according to yet another embodiment Figure 3 and Figure 4 The cross-sectional view taken from line X7-X7'. Figure 41 This is a plan view illustrating a schematic arrangement of optical patterns and columnar spacers in a color conversion substrate of a display device according to yet another embodiment.

[0358] refer to Figures 38 to 41 The display device 2_1 according to this embodiment includes a display substrate 10, a color conversion substrate 31_1, and a filler 70. The display device 2_1 and... Figures 34 to 37 The most significant difference in the display device 2 of the embodiment is that the color conversion substrate 31_1 includes a plurality of first optical patterns HR1_1, a plurality of second optical patterns HR2_1, and a plurality of third optical patterns HR3_1. Other configurations are substantially the same or similar. Therefore, redundant descriptions will be omitted and the main differences will be described.

[0359] Multiple first optical patterns HR1_1, multiple second optical patterns HR2_1 and multiple third optical patterns HR3_1 can be provided on one surface of the second capping layer 393.

[0360] In some embodiments, the first optical pattern HR1_1, the second optical pattern HR2_1, and the third optical pattern HR3_1 may have substantially the same shape and size. However, this disclosure is not limited thereto, and the shape or number of the first optical pattern HR1_1, the second optical pattern HR2_1, and the third optical pattern HR3_1 may differ from each other.

[0361] In some embodiments, the first optical pattern HR1_1 overlapping the first light-transmitting region TA1 or the first emission region LA1 may be spaced apart from each other, the second optical pattern HR2_1 overlapping the second light-transmitting region TA2 or the second emission region LA2 may be spaced apart from each other, and the third optical pattern HR3_1 overlapping the third light-transmitting region TA3 or the third emission region LA3 may be spaced apart from each other. However, this disclosure is not limited thereto, and unlike the example shown in the figures, optical patterns overlapping the same light-transmitting region may be connected to each other.

[0362] In some embodiments, the number of first optical patterns HR1_1, the number of second optical patterns HR2_1, and the number of third optical patterns HR3_1 may differ from the other one. For example, when the size of the first emission region LA1 and the size of the second emission region LA2 are larger than the size of the third emission region LA3, the number of first optical patterns HR1_1 and the number of second optical patterns HR2_1 may be greater than the number of third optical patterns HR3_1.

[0363] In addition, detailed descriptions of the materials and shapes of the first optical pattern HR1_1, the second optical pattern HR2_1, and the third optical pattern HR3_1 will be omitted because they are consistent with the reference. Figures 34 to 37 The first optical pattern HR1 (see Figure 34 and Figure 37 ), second optical pattern HR2 (see Figure 34 and Figure 37 ) and the third optical pattern HR3 (see Figure 35 and Figure 37 The description above is basically the same.

[0364] In concluding this detailed description, those skilled in the art will understand that many variations and modifications can be made to the preferred embodiments without substantially departing from the principles of this disclosure. Therefore, the preferred embodiments of this disclosure are used in a general and descriptive sense only and not for limiting purposes.

Claims

1. A display device, comprising: A first base, within which a first emission region and a non-emission region are defined; A first light-emitting element is located on the first base and overlaps with the first emitting region; A thin-film encapsulation layer is located on the first light-emitting element; The second base is located on the thin film encapsulation layer; The first color filter is located on a surface of the second base facing the first base and overlaps with the first emission region; A first wavelength conversion pattern is located on the first color filter and overlaps with the first emission region; A first optical pattern is located between the first color filter and the first wavelength conversion pattern and overlaps with the first emission region; as well as A dam pattern is located on one surface of the second substrate and surrounds the first wavelength conversion pattern, while overlapping the non-emissive region. Wherein, the refractive index of the first optical pattern is less than the refractive index of the first wavelength conversion pattern. One surface of the first optical pattern facing the first wavelength conversion pattern includes a curved surface recessed towards the second base. The first optical pattern is located in the space defined by the embankment pattern, and the embankment pattern completely surrounds the first optical pattern in the plan view.

2. The display device according to claim 1, wherein, The refractive index of the first optical pattern is 1.1 or higher and 1.4 or lower, and The refractive index of the first wavelength conversion pattern is greater than 1.7 and less than 1.

9.

3. The display device according to claim 1, wherein, The height of the embankment pattern, measured relative to one surface of the second substrate, is higher than the height of the first optical pattern, measured relative to one surface of the second substrate.

4. The display device according to claim 3, wherein, The first optical pattern includes the portion in which the height of the first optical pattern increases as the distance from the embankment pattern decreases.

5. The display device according to claim 1, wherein, The first optical pattern is in direct contact with the embankment pattern in the space defined by the embankment pattern.

6. The display device according to claim 1, further comprising a columnar spacer located on a surface of the embankment pattern facing the first base. in, The columnar spacer is made of the same material as the first optical pattern.

7. The display device according to claim 6, wherein, The first optical pattern and the columnar spacer comprise resin and a plurality of particles dispersed in the resin and containing inorganic material.

8. The display device of claim 6, further comprising a capping layer located on the first wavelength conversion pattern and the embankment pattern, and covering the columnar spacer. in, The portion of the capping layer that overlaps with the columnar spacer comes into contact with the thin-film encapsulation layer.

9. The display device according to claim 8, further comprising a filler located between the capping layer and the thin-film encapsulation layer. in, The filler is in contact with the capping layer and the thin film encapsulation layer.

10. The display device according to claim 1, wherein, The first optical pattern further includes a plurality of convex patterns protruding from one surface of the first optical pattern toward the first wavelength conversion pattern.

11. The display device according to claim 1, wherein, The first base further includes a second launch region and a third launch region. The display device further includes: The second light-emitting element is located on the first base and overlaps with the second emitting region; The third light-emitting element is located on the first base and overlaps with the third emitting region; The second color filter is located on the surface of the second base and overlaps with the second emission region; The second wavelength conversion pattern is located on the second color filter and overlaps with the second emission region; The second optical pattern is located between the second color filter and the second wavelength conversion pattern and overlaps with the second emission region; A third color filter is located on one surface of the second substrate and overlaps with the third emission region; A light transmission pattern is located on the third color filter and overlaps with the third emission region; and The third optical pattern is located between the third color filter and the light transmission pattern and overlaps with the third emission region. The first optical pattern, the second optical pattern, and the third optical pattern are made of the same material.

12. The display device according to claim 11, wherein, In the plan view, the area of ​​the third optical pattern is different from the area of ​​the first optical pattern and the area of ​​the second optical pattern.

13. The display device according to claim 11, wherein, A first opening exposing a portion of the first color filter is further defined in the first optical pattern, a second opening exposing a portion of the second color filter is further defined in the second optical pattern, and a third opening exposing a portion of the third color filter is further defined in the third optical pattern. In the plan view, the area of ​​the third opening is different from the area of ​​the first opening and the area of ​​the second opening.

14. A display device, comprising: A first base, within which a first emission region and a non-emission region are defined; A first light-emitting element is located on the first base and overlaps with the first emitting region; A thin-film encapsulation layer is located on the first light-emitting element; The second base is located on the thin film encapsulation layer; The first color filter is located on a surface of the second base facing the first base and overlaps with the first emission region; A first wavelength conversion pattern is located on the first color filter and overlaps with the first emission region; as well as A first optical pattern is located between the first color filter and the first wavelength conversion pattern and overlaps with the first emission region. Wherein, the refractive index of the first optical pattern is less than the refractive index of the first wavelength conversion pattern. One surface of the first optical pattern facing the first wavelength conversion pattern includes a curved surface recessed towards the second base. The first opening, which exposes a portion of the first color filter, is further defined in the first optical pattern, and a portion of the first wavelength conversion pattern is located in the first opening.

15. The display device according to claim 14, wherein, The edge of the first emission region completely surrounds the first opening in the plan view.

16. The display device of claim 14, further comprising a capping layer located between the first optical pattern and the first wavelength conversion pattern. in, The capping layer contacts the portion of the first color filter exposed through the first opening.

17. A display device, comprising: A first base, within which a first emission region and a non-emission region are defined; A first light-emitting element is located on the first base and overlaps with the first emitting region; A thin-film encapsulation layer is located on the first light-emitting element; The filler is located on the thin film encapsulation layer; The second base is located on the filler; The first color filter is located on a surface of the second base facing the first base and overlaps with the first emission region; A first wavelength conversion pattern is located on the first color filter and overlaps with the first emission region; as well as A first optical pattern is located between the first wavelength conversion pattern and the filler and overlaps with the first emission region. Wherein, the refractive index of the first optical pattern is greater than the refractive index of the filler, and One surface of the first optical pattern facing the filler includes a curved surface that convexes toward the filler.

18. The display device according to claim 17, wherein, The refractive index of the filler is 1.4 or higher and 1.7 or lower, and The refractive index of the first optical pattern is greater than 1.8 and less than 2.

5.

19. The display device according to claim 17, further comprising: A dam pattern is located on one surface of the second substrate and surrounds the first wavelength conversion pattern, while overlapping the non-emitting region; as well as A columnar spacer is located on one surface of the embankment pattern facing the first base. The columnar spacer is made of the same material as the first optical pattern.

20. The display device according to claim 19, wherein, The columnar spacer is in contact with the thin-film encapsulation layer, and The first optical pattern is spaced apart from the thin film encapsulation layer, and the filler is located between the first optical pattern and the thin film encapsulation layer.

21. The display device of claim 19, further comprising a capping layer covering the first wavelength conversion pattern and the embankment pattern. in, The first optical pattern and the columnar spacer are located on a surface of the capping layer facing the first base.

22. The display device according to claim 17, wherein, The edge of the first emission region completely surrounds the first optical pattern in the plan view.

23. The display device according to claim 17, wherein, The first base further includes a second launch region and a third launch region. The display device further includes: The second light-emitting element is located on the first base and overlaps with the second emitting region; The third light-emitting element is located on the first base and overlaps with the third emitting region; The second color filter is located on the surface of the second base and overlaps with the second emission region; The second wavelength conversion pattern is located on the second color filter and overlaps with the second emission region; The second optical pattern is located between the second wavelength conversion pattern and the filler, and overlaps with the second emission region; A third color filter is located on one surface of the second substrate and overlaps with the third emission region; A light transmission pattern is located on the third color filter and overlaps with the third emission region; and The third optical pattern is located between the light transmission pattern and the filler and overlaps with the third emission region. The second optical pattern has a surface facing the filler and the third optical pattern has a curved surface that protrudes toward the filler.

24. The display device according to claim 23, wherein, The first optical pattern, the second optical pattern, and the third optical pattern are provided as a plurality, and the number of the first optical pattern overlapping the first emission region and the number of the second optical pattern overlapping the second emission region are different from the number of the third optical pattern overlapping the third emission region.

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