Color conversion substrate and display device including the same

Abstract

The color conversion substrate includes a substrate having first to third light emitting regions and a light blocking region surrounding the first to third light emitting regions; a first color filter layer located under the substrate, overlapping the first light emitting region, and having a first opening exposing a portion of the substrate; a second color filter layer located under the substrate and the first color filter layer, overlapping the second light emitting region, and having a second opening exposing a portion of the first color filter layer; and a third color filter layer located under the substrate and the second color filter layer, overlapping the third light emitting region, and having a third opening exposing a portion of the second color filter layer and a fourth opening exposing a portion of the first color filter layer. On a plane, a first shortest distance from an edge of the first opening to an edge of the third opening is different from a second shortest distance from an edge of the second opening to an edge of the fourth opening.

Description

[Technical field]

[0001] The present invention relates to a color conversion substrate, and more particularly to a color conversion substrate and a display device including the same. [Background technology]

[0002] Flat panel displays are being used as an alternative to cathode ray tube displays due to their characteristics of being lightweight and thin. Representative examples of such flat panel displays include liquid crystal displays and organic light emitting display devices (OLED devices).

[0003] Recently, organic light emitting display devices including an organic light emitting element and a color conversion layer have been researched. The color conversion layer converts the wavelength of light provided by the organic light emitting element, so that the organic light emitting display device can emit light having a color different from that of the incident light.

[0004] The information disclosed in the background section is merely intended to enhance understanding of the background, and information disclosed in the background section does not necessarily constitute prior art. Summary of the Invention [Problem to be solved by the invention]

[0005] An object of the present invention is to provide a color conversion substrate that reduces manufacturing costs.

[0006] Another object of the present invention is to provide a display device including the color conversion substrate.

[0007] However, the purpose of the present invention is not limited to such a purpose, and can be expanded in various ways without departing from the spirit and scope of the present invention. [Means for solving the problem]

[0008] In order to achieve the object of the present invention, a color conversion substrate according to one embodiment of the present invention includes: a substrate having first to third light-emitting regions and a light-shielding region surrounding the first to third light-emitting regions; a first color filter layer located under the substrate, overlapping the first light-emitting region, and having a first opening and a second opening, each exposing a portion of the substrate; a second color filter layer located under the substrate and the first color filter layer, overlapping the second light-emitting region, and having a third opening exposing a portion of the substrate and a fourth opening exposing a portion of the first color filter layer; a third color filter layer located below the substrate and the second color filter layer, overlapping the third light-emitting region, and having a fifth opening exposing a portion of the second color filter layer and a sixth opening exposing a portion of the first color filter layer; and a color conversion layer located below the first to third color filter layers, overlapping the first to third color filter layers, and having color conversion particles, wherein a first shortest distance from an edge of the first opening to an edge of the fifth opening on a plane may be different from a second shortest distance from an edge of the fourth opening to an edge of the sixth opening.

[0009] In some embodiments, the second minimum distance may be greater than the first minimum distance.

[0010] In some embodiments, in the light blocking region, the first color filter layer, the second color filter layer, and the third color filter layer may partially overlap each other.

[0011] In some embodiments, the first color filter layer, the second color filter layer, and the third color filter layer may transmit light of different colors.

[0012] In some embodiments, the first color filter layer may transmit blue light, the second color filter layer may transmit red light, and the third color filter layer may transmit green light.

[0013] In some embodiments, the first opening may correspond to the second light-emitting region, the second opening may correspond to a third light-emitting region, and the fourth opening may correspond to the first light-emitting region.

[0014] In some embodiments, a portion of the third opening may overlap the third light-emitting region, a portion of the fifth opening may overlap the second light-emitting region, and a portion of the sixth opening may overlap the first light-emitting region.

[0015] In some embodiments, the width of the first opening may be smaller than the width of the fifth opening, the width of the second opening may be smaller than the width of the third opening, and the width of the fourth opening may be smaller than the width of the sixth opening.

[0016] In some embodiments, the first color filter layer may include a portion overlapping the first light-emitting region and a portion overlapping the light-shielding region, the second color filter layer may include a portion overlapping the second light-emitting region and a portion overlapping with part of the light-shielding region, and the third color filter layer may include a portion overlapping the third light-emitting region and a portion overlapping with part of the light-shielding region.

[0017] In some embodiments, the color conversion layer may include a first color conversion layer partially overlapping the second light-emitting region, a second color conversion layer partially overlapping the third light-emitting region, and a transparent layer partially overlapping the first light-emitting region.

[0018] In order to achieve the object of the present invention, a color conversion substrate according to another embodiment of the present invention includes: a substrate including first to third light-emitting regions and a light-shielding region surrounding the first to third light-emitting regions; a first color filter layer located under the substrate, overlapping the first light-emitting region, and having a first opening exposing a portion of the substrate; a second color filter layer located under the substrate and the first color filter layer, overlapping the second light-emitting region, and having a second opening exposing a portion of the first color filter layer; and a third color filter layer located under the substrate and the second color filter layer, overlapping the third light-emitting region, and having a third opening exposing a portion of the second color filter layer and a fourth opening exposing a portion of the first color filter layer, wherein a first shortest distance from an edge of the first opening to an edge of the third opening on a plane may be different from a second shortest distance from an edge of the second opening to an edge of the fourth opening.

[0019] In some embodiments, the second minimum distance may be greater than the first minimum distance.

[0020] In some embodiments, the liquid crystal display may include a color conversion layer below the first, second, third, and fourth color filter layers, overlapping the first, second, and third color filter layers, and including color conversion particles.

[0021] In some embodiments, a width of the first opening may be smaller than a width of the third opening, and a width of the second opening may be smaller than a width of the fourth opening.

[0022] In order to achieve another object of the present invention, a display device according to an embodiment of the present invention includes: a first substrate; an array substrate having a light emitting element located on the first substrate; a color conversion substrate located on the array substrate and converting a wavelength of light emitted from the light emitting element, the color conversion substrate including: a second substrate having first to third light emitting regions and a light blocking region surrounding the first to third light emitting regions; a first color filter layer located under the second substrate and overlapping the first light emitting region, the first color filter layer having a first opening and a second opening, respectively, exposing a portion of the second substrate; and a third color filter layer located under the second substrate and the first color filter layer, overlapping the second light emitting region, exposing a portion of the second substrate. a second color filter layer having an opening and a fourth opening exposing a portion of the first color filter layer; a third color filter layer located under the second substrate and the second color filter layer, overlapping the third light-emitting region, and having a fifth opening exposing a portion of the second color filter layer and a sixth opening exposing a portion of the first color filter layer; and a color conversion layer located under the first to third color filter layers, overlapping the first to third color filter layers, and including color conversion particles, wherein a first shortest distance from an edge of the first opening to an edge of the fifth opening on a plane may be different from a second shortest distance from an edge of the fourth opening to an edge of the sixth opening.

[0023] In some embodiments, the second minimum distance may be greater than the first minimum distance.

[0024] In some embodiments, a portion of the light-shielding region where the first color filter, the second color filter, and the third color filter are stacked one on top of the other may be defined as a light-shielding layer.

[0025] In some embodiments, the first color filter layer, the second color filter layer, and the third color filter layer may transmit light of different colors.

[0026] In some embodiments, the first opening may correspond to the second light-emitting region, the second opening may correspond to the third light-emitting region, and the fourth opening may correspond to the first light-emitting region.

[0027] In some embodiments, a portion of the third opening may overlap the third light-emitting region, a portion of the fifth opening may overlap the second light-emitting region, and a portion of the sixth opening may overlap the first light-emitting region.

[0028] In some embodiments, the first color filter layer may include a portion overlapping the first light-emitting region and a portion overlapping the light-shielding region, the second color filter layer may include a portion overlapping the second light-emitting region and a portion overlapping with part of the light-shielding region, and the third color filter layer may include a portion overlapping the third light-emitting region and a portion overlapping with part of the light-shielding region.

[0029] In some embodiments, the light emitting element may emit light that includes blue light. Effect of the Invention

[0030] In a color conversion substrate and a display device including the same according to the present invention, a first color filter layer, a second color filter layer, and a third color filter layer that transmit light of different colors are arranged in order below the substrate. The first color filter layer defines a second light-emitting region that emits red light and a third light-emitting region that emits green light, and the third color filter layer defines a first light-emitting region that emits blue light. In addition, in the light-shielding region, a portion where the first to third color filter layers are stacked functions as a light-shielding layer. This can reduce the manufacturing cost of the display device.

[0031] However, the effects of the present invention are not limited to the above effects, and can be expanded in various ways without departing from the spirit and scope of the present invention. [Brief description of the drawings]

[0032] [Figure 1] FIG. 1 is a perspective view showing a display device according to one embodiment of the present invention. [Diagram 2] FIG. 2 is a cross-sectional view taken along line II' in FIG. [Diagram 3] FIG. 3 is a plan view showing the display device of FIGS. [Figure 4] FIG. 4 is a cross-sectional view showing the display device of FIGS. 1 and 2 taken along line II-II' of FIG. [Diagram 5] FIG. 5 is a cross-sectional view showing the color conversion substrate of FIGS. 1 and 2 taken along line III-III' in FIG. [Figure 6] FIG. 6 is a cross-sectional view showing the color conversion substrate of FIGS. 1 and 2 taken along line III-III' in FIG. [Figure 7] FIG. 7 is a diagram showing a method for manufacturing the color conversion substrate of FIGS. [Figure 8] FIG. 8 is a diagram showing a method for manufacturing the color conversion substrate of FIGS. [Figure 9] FIG. 9 is a diagram showing a method for manufacturing the color conversion substrate of FIGS. [Figure 10] FIG. 10 is a diagram showing a method for manufacturing the color conversion substrate of FIGS. [Figure 11] FIG. 11 is a diagram showing a method for manufacturing the color conversion substrate of FIGS. [Figure 12] FIG. 12 is a diagram showing a method for manufacturing the color conversion substrate of FIGS. [Figure 13] FIG. 13 is a diagram showing a method for manufacturing the color conversion substrate of FIGS. [Figure 14] FIG. 14 is a diagram showing a method for manufacturing the color conversion substrate of FIGS. [Figure 15] FIG. 15 is a cross-sectional view showing a color conversion substrate according to another embodiment of the present invention. [Figure 16] FIG. 16 is a cross-sectional view showing a color conversion substrate according to another embodiment of the present invention. [Figure 17] FIG. 17 is a cross-sectional view showing a color conversion substrate according to another embodiment of the present invention. [Figure 18]FIG. 18 is a cross-sectional view showing a color-changing substrate according to another embodiment of the present invention. [Figure 19] FIG. 19 is a cross-sectional view showing a color conversion substrate according to another embodiment of the present invention. [Figure 20] FIG. 20 is a cross-sectional view showing a color-changing substrate according to another embodiment of the present invention. [Figure 21] FIG. 21 is a cross-sectional view showing a color-changing substrate according to another embodiment of the present invention. [Figure 22] FIG. 22 is a cross-sectional view showing a display device according to one embodiment of the present invention. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0033] Hereinafter, a color conversion substrate and a display device including the same according to an embodiment of the present invention will be described in detail with reference to the accompanying drawings. The same reference numerals are used to refer to the same elements in the drawings, and duplicated descriptions of the same elements will be omitted.

[0034] Fig. 1 is a perspective view showing a display device according to an embodiment of the present invention, Fig. 2 is a cross-sectional view taken along line II' in Fig. 1.

[0035] As shown in FIGS. 1 and 2, a display device 1000 according to an embodiment of the present invention includes an array substrate 100 , a sealing part 350 , a filling layer 300 , and a color conversion substrate 200 .

[0036] The display device 1000 has a rectangular planar shape. For example, the display device 1000 includes two first sides extending in a first direction (D1) and two second sides extending in a second direction (D2) perpendicular to the first direction. The angle between the first side and the second side is a right angle. In other embodiments, the angle between the first side and the second side of the display device 1000 forms a curved surface. Furthermore, although the display device 1000 has a rectangular shape when viewed from a planar view (e.g., when viewed from a vertical or perpendicular direction (e.g., a third direction (D3)) to the plane of the display surface), in other embodiments, the display device 1000 can have other suitable polygonal planar shapes, for example, can have rounded corners or curved edges.

[0037] The display device 1000 may be divided into a display area (DA) and a non-display area (NDA). The display area (DA) may display an image, and the non-display area (NDA) may not display an image. The non-display area (NDA) may be located on the periphery of the display area (DA). For example, the non-display area (NDA) may surround the display area (DA). That is, the non-display area (NDA) does not include pixels, and may be, for example, a bezel area.

[0038] The array substrate 100 may include a pixel array, and each pixel of the pixel array may include a light emitting element that generates light in response to a driving signal.

[0039] The color conversion substrate 200 may be located on the array substrate 100. The color conversion substrate 200 may face the array substrate 100. The color conversion substrate 200 may include a color conversion layer that converts the wavelength of light emitted from the light emitting element. The color conversion substrate 200 may also include a color filter that transmits light having a specific color. A detailed description of the color conversion substrate 200 will be provided later.

[0040] The sealing unit 350 may be located between the array substrate 100 and the color-conversion substrate 200 in the non-display area (NDA). The sealing unit 350 may be arranged along the periphery of the array substrate 100 and the color-conversion substrate 200 in the non-display area (NDA) and may surround the display area (DA) on a plane. The array substrate 100 and the color-conversion substrate 200 may be coupled to each other through the sealing unit 350. The sealing unit 350 may include an organic material. For example, the sealing unit 350 may include an epoxy resin.

[0041] The filling layer 300 may be located between the array substrate 100 and the color conversion substrate 200. The filling layer 300 may fill the gap between the array substrate 100 and the color conversion substrate 200. The filling layer 300 may include a material capable of transmitting light. For example, the filling layer 300 includes an organic material. Materials used for the filling layer 300 include silicone-based resins, epoxy-based resins, and the like. These may be used alone or in combination with each other. In other embodiments, the filling layer 300 may be omitted.

[0042] However, the display device 1000 of the present invention is described by limiting it to an organic light emitting display device (OLED), but is not limited thereto. In other embodiments, the display device 1000 may include a liquid crystal display device (LCD), a field emission display device (FED), a plasma display device (PDP), an electrophoretic display device (EPD), a quantum dot display device, or an inorganic light emitting display device. Hereinafter, the display device 1000 of the present invention will be described by taking as an example an organic light emitting display device.

[0043] FIG. 3 is a plan view showing the display device of FIGS.

[0044] 3, the display area (DA) of the display device 1000 according to an embodiment of the present invention includes a light-emitting area (LA) and a light-shielding area (BA), where each of the light-emitting areas (LA) includes a first light-emitting area (LA1), a second light-emitting area (LA2), and a third light-emitting area (LA3).

[0045] Each of the first light-emitting region (LA1), the second light-emitting region (LA2), and the third light-emitting region (LA3) may be a region where light emitted from the light-emitting element is emitted to the outside of the display device 1000. For example, the first light-emitting region (LA1) may emit a first light, the second light-emitting region (LA2) may emit a second light, and the third light-emitting region (LA3) may emit a third light. In another embodiment, the first light may be blue light, the second light may be red light, and the third light may be green light. However, the embodiment according to the present invention is not limited thereto. For example, the light-emitting regions (LA) may be combined to emit yellow, cyan, and magenta lights.

[0046] The light-emitting areas (LA) can also emit four or more colors of light. For example, the light-emitting areas (LA) can be combined to emit at least one of yellow, cyan, or magenta light in addition to red, green, and blue light. The light-emitting areas (LA) can also be combined to emit white light.

[0047] On the plane, the first light-emitting region (LA1), the second light-emitting region (LA2), and the third light-emitting region (LA3) may be repeatedly arranged along the row direction and the column direction. For example, on the plane, the first light-emitting region (LA1), the second light-emitting region (LA2), and the third light-emitting region (LA3) may be repeatedly arranged along the first direction (D1) and the second direction (D2) perpendicular to the first direction (D1). In another embodiment, on the plane, the second light-emitting region (LA2) and the first light-emitting region (LA1) may be repeatedly arranged in the first row of the display region (DA), and the third light-emitting region (LA3) may be repeatedly arranged in the second row of the display region (DA).

[0048] The first light-emitting region (LA1), the second light-emitting region (LA2), and the third light-emitting region (LA3) have different sizes. In another embodiment, the area of ​​the second light-emitting region (LA2) that emits red light may be larger than the area of ​​the first light-emitting region (LA1) that emits blue light and the area of ​​the third light-emitting region (LA3) that emits green light. In this case, the area of ​​the third light-emitting region (LA3) may be larger than the area of ​​the first light-emitting region (LA1). In another embodiment, the area of ​​the third light-emitting region (LA3) that emits green light may be larger than the area of ​​the first light-emitting region (LA1) that emits blue light and the area of ​​the second light-emitting region (LA2) that emits red light. In this case, the area of ​​the second light-emitting region (LA2) may be larger than the area of ​​the first light-emitting region (LA1).

[0049] Each of the first light-emitting area (LA1), the second light-emitting area (LA2), and the third light-emitting area (LA3) may have a triangular planar shape, a rectangular planar shape, a circular planar shape, a track-shaped planar shape, an elliptical planar shape, etc. In another embodiment, each of the first light-emitting area (LA1), the second light-emitting area (LA2), and the third light-emitting area (LA3) may have a rectangular planar shape.

[0050] The light blocking area (BA) may be located between the first light emitting area (LA1), the second light emitting area (LA2), and the third light emitting area (LA3). For example, on a plane, the light blocking area (BA) surrounds the first light emitting area (LA1), the second light emitting area (LA2), and the third light emitting area (LA3). The light blocking area (BA) may not emit light.

[0051] Fig. 4 is a cross-sectional view showing the display device of Fig. 1 and Fig. 2 along the line II-II' in Fig. 3. Figs. 5 and 6 are cross-sectional views showing the color conversion substrate of Fig. 1 and Fig. 2 along the line III-III' in Fig. 3.

[0052] 4, as described above, the display device 1000 according to an embodiment of the present invention may include the array substrate 100, the sealing portion 350, the filling layer 300, and the color conversion substrate 200. First, the array substrate 100 will be described.

[0053] The array substrate 100 may include a first substrate 110 , driving elements 120 , an insulating structure 130 , a pixel defining layer 140 , a light emitting element 150 , and an encapsulating structure 160 .

[0054] The first substrate 110 may include a transparent material or an opaque material. The first substrate 110 may be formed of a transparent resin substrate. The transparent resin substrate used in the first substrate 110 may include a polyimide substrate. In such a case, the polyimide substrate may include a first organic layer, a first barrier layer, a second organic layer, and the like. In other embodiments, the first substrate 110 may include a quartz substrate, a synthetic quartz substrate, a calcium fluoride substrate, a fluorine-doped quartz substrate, a soda-lime glass substrate, a non-alkali glass substrate, and the like. These may be used alone or in combination with each other.

[0055] The driving element 120 may be located on the first substrate 110. The driving element 120 is electrically connected to the light-emitting element 150. In other embodiments, the driving element 120 may include a thin film transistor. For example, the active pattern of the driving element 120 may include amorphous silicon, polycrystalline silicon, or a metal oxide semiconductor.

[0056] For example, the metal oxide semiconductor may be a binary compound (AB) containing indium (In), zinc (Zn), gallium (Ga), tin (Sn), titanium (Ti), aluminum (Al), hafnium (Hf), zirconium (Zr), magnesium (Mg), or the like. x ), ternary compounds (AB x C y ), quaternary compounds (AB x C y D z For example, the metal oxide semiconductor includes zinc oxide (ZnO x ), gallium oxide (GaO x ), tin oxide (SnO x ), indium oxide (InO x ), indium gallium oxide (IGO), indium zinc oxide (IZO), indium tin oxide (ITO), indium zinc tin oxide (IZTO), indium gallium zinc oxide (IGZO), etc. These may be used alone or in combination with each other.

[0057] An insulating structure 130 may be located on the first substrate 110. The insulating structure 130 may cover the driving element 120. The insulating structure 130 may include a combination of at least one inorganic insulating layer and at least one organic insulating layer. For example, the inorganic insulating layer may include silicon oxide, silicon nitride, silicon carbide, silicon oxynitride, silicon oxycarbide, etc., and the organic insulating layer may include photoresist, polyacrylic resin, polyimide resin, polyamide resin, siloxane resin, acrylic resin, epoxy resin, etc. Each of these may be used alone or in combination with each other.

[0058] A first electrode 151 may be located in each of the light emitting regions (LA1, LA2, LA3) on the insulating structure 130. The first electrode 151 may be electrically connected to the driving element 120 through a contact hole formed by removing a part of the insulating structure 130. The first electrode 151 may include a metal, an alloy, a metal nitride, a conductive metal oxide, a transparent conductive material, etc. These may be used alone or in combination with each other. For example, the first electrode 151 may act as an anode.

[0059] The pixel defining film 140 is located in a light blocking area (BA) on the insulating structure 130 and the first electrode 151. The pixel defining film 140 covers both sides of the first electrode 151 and exposes a part of the upper surface of the first electrode 151. The pixel defining film 140 includes an organic material or an inorganic material. Organic materials used for the pixel defining film 140 include photoresist, polyacrylic resin, polyimide resin, polyamide resin, siloxane resin, acrylic resin, epoxy resin, etc. These may be used alone or in combination with each other.

[0060] An emissive layer 152 may be located on the first electrode 151. Holes provided from the first electrode 151 and electrons provided from the second electrode 153 may combine in the emissive layer 152 to form excitons, which may change from an excited state to a ground state, causing the emissive layer 152 to emit light. For example, the emissive layer 152 may emit at least one of red light, green light, or blue light. In other embodiments, the emissive layer 152 may emit blue light (L1).

[0061] A second electrode 153 may be located on the light-emitting layer 152 and the pixel-defining film 140. The second electrode 153 may include a metal, an alloy, a metal nitride, a conductive metal oxide, a transparent conductive material, etc. These may be used alone or in combination with each other. For example, the second electrode 153 may act as a cathode.

[0062] Accordingly, a light emitting element 150 including a first electrode 151, a light emitting layer 152, and a second electrode 153 may be located on the first substrate 110. The light emitting element 150 may be located in each of the first light emitting area (LA1), the second light emitting area (LA2), and the third light emitting area (LA3). The light emitting element 150 may provide light to the color conversion substrate 200. In another embodiment, the light emitting element 150 includes a blue light emitting element that emits blue light (L1).

[0063] An encapsulation structure 160 may be positioned on the second electrode 153. The encapsulation structure 160 may prevent or reduce the penetration of impurities, moisture, or other contaminants from the outside into the light emitting element 150. The encapsulation structure 160 may include at least one inorganic encapsulation layer and at least one organic encapsulation layer. For example, the inorganic encapsulation layer may include silicon oxide, silicon nitride, silicon oxynitride, etc., and the organic encapsulation layer may include a polymeric hardener such as polyacrylate, etc.

[0064] A filler layer 300 is located between the color conversion substrate 200 and the array substrate 100. The filler layer 300 may include a light-transmitting material. The filler layer 300 may be formed to maintain a fill gap between the color conversion substrate 200 and the array substrate 100. For example, the filler layer 300 includes an organic material. In other embodiments, the filler layer 300 may be omitted.

[0065] The color conversion substrate 200 will be described below.

[0066] As shown in Figures 4, 5 and 6, a color conversion substrate 200 according to one embodiment of the present invention may include a second substrate 210, a color filter layer 220, a low refractive layer 230, a first protective layer 241, a color conversion layer 260, a bank structure 250, and a second protective layer 242.

[0067] The color conversion substrate 200 may be disposed on the array substrate 100. The color conversion substrate 200 and the array substrate 100 may be combined.

[0068] As described above, the display area (DA) of the display device 1000 may include the first to third light-emitting areas (LA1, LA2, LA3) and the light-shielding area (BA). Accordingly, the second substrate 210 may also include the first to third light-emitting areas (LA1, LA2, LA3) and the light-shielding area (BA).

[0069] The second substrate 210 may transmit light emitted from the light emitting element 150. For example, the second substrate 210 may be formed of a transparent resin substrate. The second substrate 210 may include an insulating material such as glass or plastic. Alternatively, the second substrate 210 may include an organic polymer material such as polycarbonate, polyethylene, or polypropylene.

[0070] A color filter layer 220 may be located below the second substrate 210. The color filter layer 220 may selectively transmit light having a particular wavelength.

[0071] In another embodiment, the color filter layer 220 may include a first color filter layer 221, a second color filter layer 222, and a third color filter layer 223. The colors of the light (Lb, Lr, Lg) emitted from the first light-emitting area (LA1), the second light-emitting area (LA2), and the third light-emitting area (LA3) may be determined by the first color filter layer 221, the second color filter layer 222, and the third color filter layer 223.

[0072] The first color filter layer 221, the second color filter layer 222, and the third color filter layer 223 may transmit light of different colors. In another embodiment, the first color filter layer 221 may overlap the first light-emitting area (LA1). For example, the first color filter layer 221 may transmit blue light (Lb). The second color filter layer 222 may overlap the second light-emitting area (LA2). For example, the second color filter layer 222 may transmit red light (Lr). The third color filter layer 223 may overlap the third light-emitting area (LA3). For example, the third color filter layer 223 may transmit green light (Lg).

[0073] The first color filter layer 221 includes a first transmissive portion overlapping the first light emitting area (LA1) and a first light blocking portion overlapping the light blocking area (BA). In another embodiment, the first light blocking portion of the first color filter layer 221 may be entirely located in the light blocking area (BA).

[0074] The second color filter layer 222 may include a second transmitting portion overlapping the second light emitting region (LA2) and a second light blocking portion overlapping a part of the light blocking region (BA). The third color filter layer 223 may include a third transmitting portion overlapping the third light emitting region (LA3) and a third light blocking portion overlapping a part of the light blocking region (BA).

[0075] In other embodiments, in the light blocking area (BA), the first color filter layer 221, the second color filter layer 222, and the third color filter layer 223 may partially overlap each other.

[0076] The first color filter layer 221 may have a first opening 221a and a second opening 221b, the second color filter layer 222 may have a third opening 222a and a fourth opening 222b, and the third color filter layer 223 may have a fifth opening 223a and a sixth opening 223b.

[0077] In another embodiment, each of the first opening 221a and the second opening 221b may expose a portion of the second substrate 210. The third opening 222a may expose a portion of the second substrate 210, and the fourth opening 222b may expose a portion of the first color filter layer 221. The fifth opening 223a may expose a portion of the second color filter layer 222, and the sixth opening 223b may expose a portion of the first color filter layer 221.

[0078] The third opening 222a may partially overlap the third light-emitting region (LA3), the fifth opening 223a may partially overlap the second light-emitting region (LA2), and the sixth opening 223b may partially overlap the first light-emitting region (LA1).

[0079] In some embodiments, the first opening 221a may correspond to the second light-emitting area (LA2), the second opening 221b may correspond to the third light-emitting area (LA3), and the fourth opening 222b may correspond to the first light-emitting area (LA1). Thus, the first color filter layer 221 may define the second light-emitting area (LA2) and the third light-emitting area (LA3), respectively, and the second color filter layer 222 may define the first light-emitting area (LA1).

[0080] The aperture ratio of the first opening 221a can be changed by changing the widths of the first opening 221a and the fifth opening 223a. Also, the aperture ratio of the fourth opening 222b can be changed by changing the widths of the fourth opening 222b and the sixth opening 223b.

[0081] In the following, an evaluation was performed on the luminous efficiency of the light-emitting regions (LA1, LA2, LA3) caused by varying the aperture ratio of each of the first opening 221a and the fourth opening 222b.

[0082] As a result, when the widths of first opening 221a and fifth opening 223a fluctuated and the aperture ratio of first opening 221a fluctuated by about 1%, the luminous efficiency of the second light-emitting region (LA2) fluctuated by about 0.67%. Also, when the widths of fourth opening 222b and sixth opening 223b fluctuated and the aperture ratio of fourth opening 222b fluctuated by about 1%, the luminous efficiency of the first light-emitting region (LA1) fluctuated by about 0.36%. This confirms that when the aperture ratio of an opening corresponding to a light-emitting region fluctuates, the luminous efficiency of the light-emitting region decreases.

[0083] Therefore, in order to prevent a decrease in the luminous efficiency of the light-emitting regions (LA1, LA2, LA3), the width of the first opening 221a is smaller than the width of the fifth opening 223a, the width of the second opening 221b is smaller than the width of the third opening 222a, and the width of the fourth opening 222b is smaller than the width of the sixth opening 223b.

[0084] Also, a first shortest distance (d1) from an edge of the first opening 221a to an edge of the fifth opening 223a on a plane may be different from a second shortest distance (d2) from an edge of the fourth opening 222b to an edge of the sixth opening 223b on a plane. In another embodiment, the second shortest distance (d2) on a plane may be greater than the first shortest distance (d1). For example, the first shortest distance (d1) may be about 4.9 μm, and the second shortest distance (d2) may be about 5.5 μm.

[0085] The following describes the values ​​of the first shortest distance (d1) and the second shortest distance (d2).

[0086] The first shortest distance (d1) can be determined taking into consideration the width of the first opening 221a, the width of the fifth opening 223a, and the overlay deviation between the edge of the first opening 221a and the edge of the fifth opening 223a.

[0087] The second shortest distance (d2) is determined taking into consideration the width of the fourth opening 222b, the width of the sixth opening 223b, the overlay deviation between the first color filter layer 221 and the edge of the fourth opening 222b, and the overlay deviation between the first color filter layer 221 and the edge of the sixth opening 223b.

[0088] When forming two or more layers that overlap each other, if each layer is shifted up, down, left, or right, the overlapping area may differ from the overlapping area originally designed. Here, the overlay deviation may refer to such a difference in the overlapping area.

[0089] The width of the first opening 221a varies by about 3 μm. The width of the fifth opening 223a varies by about 3 μm. Also, the overlay deviation between the edge of the first opening 221a and the edge of the fifth opening 223a varies by about 2.4 μm. Reflecting this, the first shortest distance (d1) was derived to be about 4.9 μm.

[0090] The width of the fourth opening 222b varies by about 3 μm. The width of the sixth opening 223b varies by about 3 μm. In addition, the overlay deviation between the first color filter layer 221 and the edge of the fourth opening 222b varies by about 2.4 μm. The overlay deviation between the first color filter layer 221 and the edge of the sixth opening 223b varies by about 2.4 μm. Reflecting this, the second shortest distance (d2) is derived to be about 5.5 μm.

[0091] This makes it possible to confirm that the first shortest distance (d1) is different from the second shortest distance (d2) on the plane, and that the second shortest distance (d2) is greater than the first shortest distance (d1) on the plane.

[0092] 4, 5 and 6 again, a light blocking layer may be located under the second substrate 210. The light blocking layer may overlap the light blocking area (BA). Light emitted from the color conversion layer 260 may transmit only a portion of the second substrate 210. That is, the light emitted from the color conversion layer 260 may transmit only the area of ​​the second substrate 210 that overlaps with the light emitting areas (LA1, LA2, LA3), and may not transmit through the area of ​​the second substrate 210 that overlaps with the light blocking area (BA).

[0093] In some embodiments, the light blocking layer is defined as a laminated portion of the first color filter layer 221, the second color filter layer 222, and the third color filter layer 223 in the light blocking area (BA), or the light blocking layer may be defined as a portion of the first color filter layer 221 that overlaps the light blocking area (BA).

[0094] The light blocking layer may include a light blocking material. For example, the light blocking material may have a particular color. In some embodiments, the light blocking material may have a blue color.

[0095] The low refractive layer 230 may be located below the color filter layer 220. The low refractive layer 230 may cover the color filter layer 220. The low refractive layer 230 may have a relatively low refractive index. For example, the refractive index of the low refractive layer 230 may be lower than the refractive index of the color conversion layer 260. The low refractive layer 230 may include an organic material. For example, the low refractive layer 230 may include an organic polymer material including silicon.

[0096] A first protective layer 241 may be located under the low refractive layer 230. The first protective layer 241 may cover the low refractive layer 230. The first protective layer 241 may block external impurities to prevent contamination of the color filter layer 220. The first protective layer 241 may include an inorganic material. For example, the first protective layer 241 may include silicon oxide, silicon nitride, aluminum nitride, etc. These may be used alone or in combination with each other.

[0097] A bank structure 250 may be located under the first protective layer 241. The bank structure 250 may surround the color conversion layer 260. A space capable of accommodating an ink composition may be formed in the bank structure 250 during the process of forming the color conversion layer 260. Thus, the bank structure 250 may have a lattice or matrix shape on a plane.

[0098] For example, the bank structure 250 may include an organic material such as an epoxy resin, a phenolic resin, an acrylic resin, a silicone resin, etc., which may be used alone or in combination with each other. In another embodiment, the bank structure 250 may include a light-shielding material to act as a black matrix. For example, at least a portion of the bank structure 250 includes a light-shielding material such as a pigment, a dye, carbon black, etc. Also, the bank structure 250 overlaps a portion of the light-shielding area (BA).

[0099] The color conversion layer 260 is located under the first protective layer 241. The color conversion layer 260 may overlap the color filter layers 221, 222, and 223. The color conversion layer 260 may convert light emitted from the light emitting element 150 into light having a specific wavelength. For example, the color conversion layer 260 may include color conversion particles.

[0100] The color conversion layer 260 may include a first color conversion layer 262, a second color conversion layer 264, and a transmissive layer 265. The first color conversion layer 262 may partially overlap the second light-emitting area (LA2), the second color conversion layer 264 may partially overlap the third light-emitting area (LA3), and the transmissive layer 265 may partially overlap the first light-emitting area (LA1).

[0101] The first color conversion layer 262 may convert the light (L1) emitted from the light emitting element 150 into light of a first color (Lr). The second color conversion layer 264 may convert the light (L1) emitted from the light emitting element 150 into light of a second color (Lg). The transmissive layer 265 may transmit the light (L1) emitted from the light emitting element 150. In another embodiment, the first color may be red and the second color may be green. The transmissive layer 265 may also transmit blue light (Lb).

[0102] The first color conversion layer 262 may include first color conversion particles that are excited by the light (L1) generated from the light emitting element 150 and emit the first color light (e.g., red light (Lr)). The first color conversion layer 262 may further include a first photosensitive polymer having first scattering particles dispersed therein.

[0103] The second color conversion layer 264 may include second color conversion particles that are excited by the light (L1) generated from the light emitting element 150 and emit the second color light (e.g., green light (Lg)). The second color conversion layer 264 may further include a second photosensitive polymer in which second scattering particles are dispersed. Each of the first color conversion particles and the second color conversion particles may represent quantum dots.

[0104] The transmissive layer 265 may transmit the light (L1) generated from the light emitting element 150 and emit the light in the direction of the second substrate 210. The transmissive layer 265 includes a third photosensitive polymer having third scattering particles dispersed therein. For example, each of the first to third photosensitive polymers may include an organic material having optical transparency, such as a silicone resin or an epoxy resin. The first to third photosensitive polymers may include the same material as each other. The first to third scattering particles scatter and emit the light (L1) generated from the light emitting element 150, and the first to third scattering particles may include the same material as each other.

[0105] Thus, the first light-emitting area (LA1) may emit blue light (Lb), the second light-emitting area (LA2) may emit red light (Lr), and the third light-emitting area (LA3) may emit green light (Lg).

[0106] A second protective layer 242 may be located under the bank structure 250 and the color conversion layer 260. The second protective layer 242 may cover the color conversion layer 260 and the bank structure 250. For example, the second protective layer 242 may include an inorganic material. For example, the second protective layer 242 may include silicon oxide, silicon nitride, aluminum nitride, etc. These may be used alone or in combination with each other.

[0107] In the color conversion substrate 200 according to some embodiments of the present invention, a first color filter layer 221, a second color filter layer 222, and a third color filter layer 223 that transmit light of different colors may be disposed in this order under the second substrate 210. The first opening 221a of the first color filter layer 221 may correspond to the second light emitting region (LA2), the second opening 221b of the first color filter layer 221 may correspond to the third light emitting region (LA3), and the fourth opening 222b of the second color filter layer 222 may correspond to the first light emitting region (LA1). In addition, in the light blocking region (BA), a portion where the first to third color filter layers 221, 222, and 223 are stacked may function as the light blocking layer. This may reduce the manufacturing cost of the display device 1000.

[0108] Figures 7 to 14 are diagrams showing a manufacturing method of the color conversion substrate of Figures 5 and 6. For example, Figure 8 is a cross-sectional view showing the first color filter layer 221 of Figure 7 along line IV-IV', Figure 10 is a cross-sectional view showing the second color filter layer 222 of Figure 9 along line V-V', and Figure 12 is a cross-sectional view showing the third color filter layer 223 of Figure 11 along line VI-VI'.

[0109] 7 and 8, a first color filter layer 221 may be formed on a second substrate 210. For example, the second substrate 210 may be formed of a transparent resin substrate. The second substrate 210 may include an insulating material such as glass or plastic. Alternatively, the second substrate 210 may include an organic polymer material such as polycarbonate, polyethylene, or polypropylene.

[0110] The first color filter layer 221 may overlap the first light-emitting region (LA1). The first color filter layer 221 may further overlap the light-shielding region (BA). That is, a first portion of the first color filter layer 221 may overlap the first light-emitting region (LA1), and a second portion of the first color filter layer 221 may overlap the light-shielding region (BA).

[0111] The first color filter layer 221 may have a first opening 221a corresponding to the second light-emitting area (LA2) and a second opening 221b corresponding to the third light-emitting area (LA3). Thus, the first color filter layer 221 defines the second light-emitting area (LA2) and the third light-emitting area (LA3).

[0112] In some embodiments, the first color filter layer 221 may be a blue color filter that transmits blue light. For example, the first color filter layer 221 may be formed of a blue pigment and / or a color filter composition that includes a blue pigment.

[0113] As shown in FIGS. 9 and 10, a second color filter layer 222 may be formed on the second substrate 210 and the first color filter layer 221 .

[0114] The second color filter layer 222 may overlap the second light-emitting region (LA2). The second color filter layer 222 may further overlap a portion of the light-shielding region (BA). That is, a first portion of the second color filter layer 222 may overlap the second light-emitting region (LA2), and a second portion of the second color filter layer 222 may overlap a portion of the light-shielding region (BA).

[0115] The second color filter layer 222 may have a third opening 222a and a fourth opening 222b. A portion of the third opening 222a may overlap the third light-emitting area (LA3), and the fourth opening 222b may correspond to the first light-emitting area (LA1). The width of the third opening 222a may be greater than the width of the second opening 221b. Thus, the second color filter layer 222 may define the first light-emitting area (LA1).

[0116] In some embodiments, the second color filter layer 222 can be a red color filter that transmits red light. For example, the second color filter layer 222 can be made of a red pigment and / or a color filter composition that includes a red pigment.

[0117] As shown in FIGS. 11 and 12, a third color filter layer 223 may be formed on the second substrate 210 and the second color filter layer 222 .

[0118] The third color filter layer 223 may overlap the third light-emitting region (LA3). The third color filter layer 223 may further overlap a portion of the light-shielding region (BA). That is, a first portion of the third color filter layer 223 may overlap the third light-emitting region (LA3), and a second portion of the third color filter layer 223 may overlap a portion of the light-shielding region (BA).

[0119] The third color filter layer 223 may have a fifth opening 223a and a sixth opening 223b. A portion of the fifth opening 223a may overlap the second light-emitting region (LA2), and a portion of the sixth opening 223b may overlap the first light-emitting region (LA1). That is, the width of the fifth opening 223a may be larger than the width of the first opening 221a, and the width of the sixth opening 223b may be larger than the width of the fourth opening 222b.

[0120] In another embodiment, the third color filter layer 223 may be a green color filter that transmits green light. For example, the third color filter layer 223 may be made of a green pigment and / or a color filter composition including a green pigment.

[0121] Thereby, the color filter layer 220 including the first color filter layer 221, the second color filter layer 222, and the third color filter layer 223 can be formed on the second substrate 210. That is, the first color filter layer 221, the second color filter layer 222, and the third color filter layer 223 can be formed in sequence.

[0122] 13 and 14, a low refractive layer 230 may be formed on the color filter layer 220. The low refractive layer 230 may cover the color filter layer 220. The low refractive layer 230 may have a relatively low refractive index. For example, the low refractive layer 230 may be formed using an organic material.

[0123] A first protective layer 241 may be formed on the low refractive layer 230. The first protective layer 241 may cover the low refractive layer 230. For example, the first protective layer 241 may be formed using an inorganic material.

[0124] A bank structure 250 may be formed on the first protective layer 241. The bank structure 250 may be formed to overlap a portion of the light blocking area (BA). For example, the bank structure 250 may include an organic material or the like. Also, the bank structure 250 may include a light blocking material.

[0125] The bank structure 250 may have a first opening region (OP1), a second opening region (OP2), and a third opening region (OP3). A portion of the first opening region (OP1) may overlap the second light-emitting region (LA2), a portion of the second opening region (OP2) may overlap the third light-emitting region (LA3), and a portion of the third light-emitting region (OP3) may overlap the first light-emitting region (LA1). Each of the first to third opening regions (OP1, OP2, OP3) may accommodate an ink composition during the process of forming the color conversion layer 260.

[0126] The inkjet device 400 may drop an ink composition onto the first opening area (OP1). Here, the ink composition may be a material that forms a color conversion layer.

[0127] The inkjet device 400 can repeatedly dispense the ink composition onto the first opening region (OP1) to form a first color conversion layer 262. The inkjet device 400 can also repeatedly dispense the ink composition onto the second opening region (OP2) to form a second color conversion layer 264, and the inkjet device 400 can repeatedly dispense the ink composition onto the third opening region (OP3) to form a transmission layer 265.

[0128] 4, 5 and 6, a second protective layer 242 may be formed on the bank structure 250 and the color conversion layer 260. The second protective layer 242 may cover the color conversion layer 260 and the bank structure 250. For example, the second protective layer 242 may be formed using an inorganic material.

[0129] In this way, the color conversion substrate 200 in FIG. 4, FIG. 5, and FIG. 6 can be manufactured.

[0130] 15 to 21 are cross-sectional views showing color-changing substrates according to other embodiments of the present invention.

[0131] First, as shown in Figures 15 to 20, color conversion substrates 201, 202, 203, 204, 205, and 206 according to other embodiments of the present invention may include a second substrate 210, a color filter layer 220, a low refractive index layer 230, a first protective layer 241, a color conversion layer 260, a bank structure 250, and a second protective layer 242. However, the color conversion substrates 201, 202, 203, 204, 205, and 206 described in Figures 15 to 20 may be substantially the same as or similar to the color conversion substrate 200 described in Figures 4, 5, and 6, except for the stacking order of the color filter layers 221, 222, and 223. Hereinafter, a duplicated description will be omitted.

[0132] As described above, the first color filter layer 221, the second color filter layer 222, and the third color filter layer 223 may transmit light of different colors. In another embodiment, the first color filter layer 221 overlapping the first light-emitting area (LA1) may transmit blue light, the second color filter layer 222 overlapping the second light-emitting area (LA2) may transmit red light, and the third color filter layer 223 overlapping the third light-emitting area (LA3) may transmit green light. Thus, the first light-emitting area (LA1) may emit blue light, the second light-emitting area (LA2) may emit red light, and the third light-emitting area (LA3) may emit green light.

[0133] The first color filter layer 221 may have a first opening 221a and a second opening 221b, the second color filter layer 222 may have a third opening 222a and a fourth opening 222b, and the third color filter layer 223 may have a fifth opening 223a and a sixth opening 223b.

[0134] 15, a first color filter layer 221 may be located below the second substrate 210. A third color filter layer 223 may be located below the second substrate 210 and the first color filter layer 221. A second color filter layer 222 may be located below the second substrate 210 and the third color filter layer 223. That is, the first color filter layer 221, the third color filter layer 223, and the second color filter layer 222 may be arranged in this order below the second substrate 210.

[0135] In some embodiments, the first opening 221a of the first color filter layer 221 may correspond to the third light-emitting area (LA3), and the second opening 221b of the first color filter layer 221 may correspond to the second light-emitting area (LA2). Also, the sixth opening 223b of the third color filter layer 223 may correspond to the first light-emitting area (LA1). Thus, the first color filter layer 221 may define the second light-emitting area (LA2) and the third light-emitting area (LA3), respectively, and the third color filter layer 223 may define the first light-emitting area (LA1).

[0136] 16, a second color filter layer 222 may be located below the second substrate 210. A third color filter layer 223 may be located below the second substrate 210 and the second color filter layer 222. A first color filter layer 221 may be located below the second substrate 210 and the third color filter layer 223. That is, the second color filter layer 222, the third color filter layer 223, and the first color filter layer 221 may be arranged in this order below the second substrate 210.

[0137] In some embodiments, the third opening 222a of the second color filter layer 222 may correspond to the third light-emitting area (LA3), and the fourth opening 222b of the second color filter layer 222 may correspond to the first light-emitting area (LA1). Also, the sixth opening 223b of the third color filter layer 223 may correspond to the second light-emitting area (LA2). Thus, the second color filter layer 222 may define the third light-emitting area (LA3) and the first light-emitting area (LA1), respectively, and the third color filter layer 223 may define the second light-emitting area (LA2).

[0138] 17, a second color filter layer 222 may be located below the second substrate 210. A first color filter layer 221 may be located below the second substrate 210 and the second color filter layer 222. A third color filter layer 223 may be located below the second substrate 210 and the first color filter layer 221. That is, the second color filter layer 222, the first color filter layer 221, and the third color filter layer 223 may be located in this order below the second substrate 210.

[0139] In some embodiments, the third opening 222a of the second color filter layer 222 may correspond to the first light-emitting area (LA1), and the fourth opening 222b of the second color filter layer 222 may correspond to the third light-emitting area (LA3). Also, the second opening 221b of the first color filter layer 221 may correspond to the second light-emitting area (LA2). Thus, the second color filter layer 222 may define the first light-emitting area (LA1) and the third light-emitting area (LA3), respectively, and the first color filter layer 221 may define the second light-emitting area (LA2).

[0140] 18, a third color filter layer 223 may be located below the second substrate 210. A first color filter layer 221 may be located below the second substrate 210 and the third color filter layer 223. A second color filter layer 222 may be located below the second substrate 210 and the first color filter layer 221. That is, the third color filter layer 223, the first color filter layer 221, and the second color filter layer 222 may be located in this order below the second substrate 210.

[0141] In some embodiments, the fifth opening 223a of the third color filter layer 223 may correspond to the first light-emitting area (LA1), and the sixth opening 223b of the third color filter layer 223 may correspond to the second light-emitting area (LA2). Also, the second opening 221b of the first color filter layer 221 may correspond to the third light-emitting area (LA3). Thus, the third color filter layer 223 may define the first light-emitting area (LA1) and the second light-emitting area (LA2), respectively, and the first color filter layer 221 may define the third light-emitting area (LA3).

[0142] 19, a third color filter layer 223 may be located below the second substrate 210. A second color filter layer 222 may be located below the second substrate 210 and the third color filter layer 223. A first color filter layer 221 may be located below the second substrate 210 and the second color filter layer 222. That is, the third color filter layer 223, the second color filter layer 222, and the first color filter layer 221 may be located in this order below the second substrate 210.

[0143] In some embodiments, the fifth opening 223a of the third color filter layer 223 may correspond to the second light-emitting area (LA2), and the sixth opening 223b of the third color filter layer 223 may correspond to the first light-emitting area (LA1). Also, the fourth opening 222b of the second color filter layer 222 may correspond to the third light-emitting area (LA3). Thus, the third color filter layer 223 may define the second light-emitting area (LA2) and the first light-emitting area (LA1), respectively, and the first color filter layer 221 may define the third light-emitting area (LA3).

[0144] 20, a second color filter layer 222 may be located below the second substrate 210. A first color filter layer 221 may be located below the second substrate 210 and the second color filter layer 222. A third color filter layer 223 may be located below the second substrate 210 and the first color filter layer 221. That is, the second color filter layer 222, the first color filter layer 221, and the third color filter layer 223 may be located in this order below the second substrate 210.

[0145] In some embodiments, the third opening 222a of the second color filter layer 222 may correspond to the first light-emitting area (LA1). Also, the first opening 221a of the first color filter layer 221 may correspond to the third light-emitting area (LA3), and the second opening 221b of the first color filter layer 221 may correspond to the second light-emitting area (LA2). Thus, the second color filter layer 222 may define the first light-emitting area (LA1), and the first color filter layer 221 may define the third light-emitting area (LA3) and the second light-emitting area (LA2), respectively.

[0146] 21, a color conversion substrate 207 according to an embodiment of the present invention may include a second substrate 210, a color filter layer 270, a low refractive layer 230, a first protective layer 241, a color conversion layer 260, a bank structure 250, and a second protective layer 242. However, the color conversion substrate 207 described in FIG. 21 may be similar to the color conversion substrate 200 described in FIG. 4, FIG. 5, and FIG. 6, except for the color filter layer 270. Hereinafter, duplicated descriptions will be omitted.

[0147] A color filter layer 270 may be located under the second substrate 210. The color filter layer 270 may include a first color filter layer 271, a second color filter layer 272, and a third color filter layer 273. In another embodiment, the first color filter layer 271 may overlap the first light-emitting area (LA1), the second color filter layer 272 may overlap the second light-emitting area (LA2), and the third color filter layer 273 may overlap the third light-emitting area (LA3). That is, the first to third color filter layers 271, 272, and 273 may not overlap the light-shielding area (BA).

[0148] In some embodiments, the bank structure 250 does not overlap the first to third light-emitting areas (LA1, LA2, LA3) and only overlaps the light-shielding area (BA), i.e., the bank structure 250 defines the first to third light-emitting areas (LA1, LA2, LA3).

[0149] FIG. 22 is a cross-sectional view showing a display device according to one embodiment of the present invention.

[0150] 22, a display device 1100 according to an embodiment of the present invention may include a first substrate 110, a driving element 120, an insulating structure 130, a pixel defining film 140, a light emitting element 150, an encapsulating structure 160, a bank structure 410, a color conversion layer 420, a low refractive layer 430, a color filter layer 440, and a protective layer 450. Hereinafter, descriptions overlapping with those of the display device 1000 described in FIG. 4 will be omitted.

[0151] The display device 1100 according to an embodiment of the present invention may have a single substrate structure. For example, the color conversion layer 420 is disposed on the encapsulation structure 160. The color conversion layer 420 may include color conversion particles.

[0152] The color conversion layer 420 includes a first color conversion layer 422, a second color conversion layer 424, and a transmissive layer 425. The first color conversion layer 422 partially overlaps with the second light-emitting region (LA2), the second color conversion layer 424 partially overlaps with the third light-emitting region (LA3), and the transmissive layer 425 partially overlaps with the first light-emitting region (LA1).

[0153] The first color conversion layer 422 may include first color conversion particles. The first color conversion layer 422 may further include a first photosensitive polymer in which first scattering particles are dispersed. The second color conversion layer 424 may include second color conversion particles. The second color conversion layer 424 may further include a second photosensitive polymer in which second scattering particles are dispersed. Each of the first color conversion particles and the second color conversion particles may represent quantum dots. The transparent layer 425 may include a third photosensitive polymer in which third scattering particles are dispersed. For example, each of the first to third photosensitive polymers may include an organic material having optical transparency, such as a silicone resin or an epoxy resin. The first to third photosensitive polymers include the same material as each other. The first to third scattering particles may include the same material as each other.

[0154] A bank structure 410 may be positioned on the encapsulation structure 160. The bank structure 410 may surround the color conversion layer 420. A space capable of accommodating an ink composition may be formed in the bank structure 410 during the process of forming the color conversion layer 420. The bank structure 410 may also overlap a portion of the light blocking area (BA). For example, the bank structure 410 may include a light blocking material.

[0155] The low refractive layer 430 may be located on the bank structure 410 and the color conversion layer 420. The low refractive layer 430 may have a relatively low refractive index. For example, the refractive index of the low refractive layer 430 may be lower than the refractive index of the color conversion layer 420. The low refractive layer 430 may include an organic material. For example, the low refractive layer 430 may include an organic polymer material including silicon.

[0156] A color filter layer 440 may be located on the low refractive index layer 430. The color filter layer 440 may include a first color filter layer 441, a second color filter layer 442, and a third color filter layer 443.

[0157] The first color filter layer 441 may include a first transmissive portion overlapping the first light emitting area (LA1) and a first light blocking portion overlapping the light blocking area (BA). In another embodiment, the first light blocking portion of the first color filter layer 441 may be located entirely in the light blocking area (BA).

[0158] The second color filter layer 442 may include a second transmitting portion overlapping the second light emitting region (LA2) and a second light blocking portion overlapping a part of the light blocking region (BA). The third color filter layer 443 may include a third transmitting portion overlapping the third light emitting region (LA3) and a third light blocking portion overlapping a part of the light blocking region (BA).

[0159] A protective layer 450 may be located on the color filter layer 440. The protective layer 450 may cover the color filter layer 440. For example, the protective layer 450 may include an inorganic material or an organic material. The inorganic material used as the protective layer 450 may include silicon oxide, silicon nitride, silicon oxynitride, etc., which may be used alone or in combination with each other.

[0160] Although the present invention has been described with reference to one embodiment of the present invention, it will be understood by those skilled in the art that various modifications and variations of the present invention can be made without departing from the spirit and scope of the present invention as set forth in the following claims. [Industrial Applicability]

[0161] The present invention can be applied to various display devices equipped with a display device, such as high-resolution smartphones, mobile phones, smart pads, smart watches, tablet PCs, vehicle navigation systems, televisions, computer monitors, and notebook computers.

Claims

1. a substrate having first to third light emitting regions and a light shielding region surrounding the first to third light emitting regions; a first color filter layer located under the substrate, overlapping the first light-emitting region, and having a first opening and a second opening, each of which exposes a portion of the substrate; a second color filter layer located under the substrate and the first color filter layer, overlapping the second light-emitting region, and having a third opening exposing a portion of the substrate and a fourth opening exposing a portion of the first color filter layer; a third color filter layer located under the substrate and the second color filter layer, overlapping the third light-emitting region, and having a fifth opening exposing a portion of the second color filter layer and a sixth opening exposing a portion of the first color filter layer; a color conversion layer located below the first to third color filter layers and overlapping the first to third color filter layers, the color conversion layer having color conversion particles; A color conversion substrate, characterized in that, on a plane, a first shortest distance from an edge of the first opening to an edge of the fifth opening is different from a second shortest distance from an edge of the fourth opening to an edge of the sixth opening.

2. 2. The color conversion substrate according to claim 1, wherein the second shortest distance is greater than the first shortest distance.

3. 2. The color conversion substrate according to claim 1, wherein the first color filter layer, the second color filter layer, and the third color filter layer partially overlap each other in the light blocking region.

4. 2. The color conversion substrate according to claim 1, wherein the first color filter layer, the second color filter layer, and the third color filter layer transmit light of different colors.

5. 5. The color conversion substrate according to claim 4, wherein the first color filter layer transmits blue light, the second color filter layer transmits red light, and the third color filter layer transmits green light.

6. 5. The color conversion substrate of claim 4, wherein the first opening corresponds to the second light-emitting region, the second opening corresponds to the third light-emitting region, and the fourth opening corresponds to the first light-emitting region.

7. 5. The color conversion substrate of claim 4, wherein a portion of the third opening overlaps with the third light-emitting region, a portion of the fifth opening overlaps with the second light-emitting region, and a portion of the sixth opening overlaps with the first light-emitting region.

8. 5. A color conversion substrate as described in claim 4, characterized in that the width of the first opening is smaller than the width of the fifth opening, the width of the second opening is smaller than the width of the third opening, and the width of the fourth opening is smaller than the width of the sixth opening.

9. 2. The color conversion substrate according to claim 1, wherein the first color filter layer includes a portion overlapping the first light-emitting region and a portion overlapping the light-shielding region, the second color filter layer includes a portion overlapping the second light-emitting region and a portion overlapping with part of the light-shielding region, and the third color filter layer includes a portion overlapping the third light-emitting region and a portion overlapping with part of the light-shielding region.

10. The color conversion layer is a first color conversion layer partially overlapping the second light-emitting region; a second color conversion layer partially overlapping the third light-emitting region; 2. The color conversion substrate of claim 1, further comprising a transmissive layer partially overlapping the first light-emitting region.

11. a substrate including first to third light emitting regions and a light blocking region surrounding the first to third light emitting regions; a first color filter layer located below the substrate, overlapping the first light-emitting region, and having a first opening exposing a portion of the substrate; a second color filter layer located under the substrate and the first color filter layer, overlapping the second light-emitting region, and having a second opening exposing a portion of the first color filter layer; a third color filter layer located under the substrate and the second color filter layer, overlapping the third light-emitting region, and having a third opening exposing a portion of the second color filter layer and a fourth opening exposing a portion of the first color filter layer; A color conversion substrate, characterized in that, on a plane, a first shortest distance from an edge of the first opening to an edge of the third opening is different from a second shortest distance from an edge of the second opening to an edge of the fourth opening.

12. 12. The color conversion substrate according to claim 11, wherein the second shortest distance is greater than the first shortest distance.

13. 12. The color conversion substrate according to claim 11, further comprising a color conversion layer below the first to third color filter layers, overlapping the first to third color filter layers, and including color conversion particles.

14. 12. The color conversion substrate according to claim 11, wherein the width of the first opening is smaller than the width of the third opening, and the width of the second opening is smaller than the width of the fourth opening.

15. an array substrate having a first substrate and a light emitting element located on the first substrate; a color conversion substrate located on the array substrate and configured to convert a wavelength of light emitted from the light emitting element; The color conversion substrate is a second substrate having first to third light emitting regions and a light blocking region surrounding the first to third light emitting regions; a first color filter layer located under the second substrate, overlapping the first light-emitting region, and having a first opening and a second opening, each of which exposes a portion of the second substrate; a second color filter layer located under the second substrate and the first color filter layer, overlapping the second light-emitting region, and having a third opening exposing a portion of the second substrate and a fourth opening exposing a portion of the first color filter layer; a third color filter layer located under the second substrate and the second color filter layer, overlapping the third light-emitting region, and having a fifth opening exposing a portion of the second color filter layer and a sixth opening exposing a portion of the first color filter layer; a color conversion layer located below the first to third color filter layers, overlapping the first to third color filter layers, and including color conversion particles; A display device, characterized in that, on a plane, a first shortest distance from an edge of the first opening to an edge of the fifth opening is different from a second shortest distance from an edge of the fourth opening to an edge of the sixth opening.

16. 16. The display device according to claim 15, wherein the second minimum distance is greater than the first minimum distance.

17. 16. The display device according to claim 15, wherein a portion in the light-shielding region where the first color filter, the second color filter, and the third color filter are stacked is defined as a light-shielding layer.

18. 16. The display device according to claim 15, wherein the first color filter layer, the second color filter layer, and the third color filter layer transmit light of different colors.

19. 20. The display device of claim 18, wherein the first opening corresponds to the second light-emitting region, the second opening corresponds to the third light-emitting region, and the fourth opening corresponds to the first light-emitting region.

20. 19. The display device of claim 18, wherein a portion of the third opening overlaps with the third light-emitting region, a portion of the fifth opening overlaps with the second light-emitting region, and a portion of the sixth opening overlaps with the first light-emitting region.

21. the first color filter layer includes a portion overlapping the first light-emitting region and a portion overlapping the light-shielding region, the second color filter layer includes a portion overlapping the second light-emitting region and a portion overlapping the light-shielding region, 16. The display device according to claim 15, wherein the third color filter layer includes a portion overlapping the third light-emitting region and a portion overlapping a part of the light-shielding region.

22. The display device of claim 15, wherein the light emitting element emits light including blue light.

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