Color conversion substrate and display device including the same

Abstract

A color conversion substrate and a display device including the color conversion substrate are provided. The color conversion substrate according to one embodiment includes: a second substrate in which a first light transmission area, a second light transmission area, and a third light transmission area are defined; a first stack positioned on the second substrate and overlapping the first light transmission area, the second light transmission area, and the third light transmission area; a first color filter positioned on the first stack and overlapping the first light transmission area; a second color filter overlapping the second light transmission area; a third color filter overlapping the third light transmission area; and a second stack positioned between the first stack and at least one of the second color filter and the third color filter.

Description

Technical Field

[0001] The present disclosure relates to a color conversion substrate and a display device including the color conversion substrate. Background Art

[0002] As multimedia develops, the importance of display devices is gradually increasing. In response to the importance of display devices, various display devices such as a liquid crystal display device (LCD) and an organic light emitting diode display device (OLED) have been developed.

[0003] Among the display devices, the self-emitting display device includes a self-luminous element, such as an organic light-emitting element. The self-luminous element may include two opposing electrodes and a light-emitting layer between the two opposing electrodes. When the self-luminous element is an organic light-emitting element, electrons and holes provided from the two electrodes may be recombined in the light-emitting layer to generate excitons, and the generated excitons may transition from an excited state to a ground state and may emit light.

[0004] Self-luminous display devices that do not require a light source such as a backlight unit have low power consumption and can be configured in a lightweight and thin shape, and are also attracting attention as next-generation display devices due to their high-quality characteristics such as a wide viewing angle, high brightness and contrast, and a fast response speed. Summary of the invention

[0005] Technical issues

[0006] Aspects of the present disclosure provide a display device capable of improving display quality by reducing reflectivity of external light.

[0007] It should be noted that aspects of the present disclosure are not limited thereto, and other aspects not mentioned herein will be apparent to those of ordinary skill in the art from the following description.

[0008] Technical Solution

[0009] According to an embodiment of the present disclosure, a color conversion substrate includes: a second substrate on which a first light transmission area, a second light transmission area, and a third light transmission area are defined; a first stack positioned on the second substrate and overlapping with the first light transmission area, the second light transmission area, and the third light transmission area; a first color filter, a second color filter, and a third color filter positioned on the first stack, the first color filter overlapping with the first light transmission area, the second color filter overlapping with the second light transmission area, and the third color filter overlapping with the third light transmission area; and a second stack positioned between at least one of the second color filter and the third color filter and the first stack, the refractive index of the first stack having a value between the refractive index of the second substrate and the refractive index of the first color filter, and the refractive index of the first stack being smaller than the refractive index of the second stack.

[0010] The second stack extends from at least one of the second light-transmitting area and the third light-transmitting area to overlap with the first light-transmitting area.

[0011] The second stack is positioned between the first stack and the second color filter in the second light-transmitting region, and is positioned between the first stack and the third color filter in the third light-transmitting region.

[0012] The second stack is positioned between the first stack and the second color filter in the second light transmitting area and does not overlap with the first light transmitting area and the third light transmitting area.

[0013] The color conversion substrate may further include a third stack positioned on the first stack, wherein the third stack is positioned between the first stack and the third color filter in the third light-transmitting region.

[0014] The third stack extends from the third light-transmitting area to overlap the first light-transmitting area and the second light-transmitting area.

[0015] The refractive index of the third stack has a value between the refractive index of the first stack and the refractive index of the third color filter.

[0016] According to an embodiment of the present disclosure, a color conversion substrate includes: a second substrate on which a first light transmission area, a second light transmission area, and a third light transmission area are defined; a first color filter, a second color filter, and a third color filter, wherein the first color filter is positioned on the second substrate and overlaps with the first light transmission area, the second color filter is positioned on the second substrate and overlaps with the second light transmission area, and the third color filter is positioned on the second substrate and overlaps with the third light transmission area; and a second stack positioned between at least one of the second color filter and the third color filter and the second substrate, wherein a refractive index of the second stack has a value between a refractive index of the second substrate and a refractive index of at least one of the second color filter and the third color filter.

[0017] The color conversion substrate may further include a first stack that overlaps the first light-transmitting area, is positioned between the second substrate and the first color filter, and does not overlap the second light-transmitting area and the third light-transmitting area.

[0018] The second stack extends from at least one of the second light-transmitting area and the third light-transmitting area to overlap with the first light-transmitting area.

[0019] A refractive index of the first stack has a value between the refractive index of the second substrate and the refractive index of the first color filter, and the refractive index of the first stack is smaller than the refractive index of the second stack.

[0020] The second stack is positioned between the second substrate and the second color filter in the second light-transmitting region, and between the second substrate and the third color filter in the third light-transmitting region.

[0021] The second stack is positioned between the second substrate and the second color filter in the second light-transmitting area and does not overlap with the first light-transmitting area and the third light-transmitting area.

[0022] The color conversion substrate may further include a third stack positioned on the second substrate, wherein the third stack is positioned between the second substrate and the third color filter in the third light-transmitting region.

[0023] The third stack extends from the third light-transmitting area to overlap the first light-transmitting area and the second light-transmitting area.

[0024] A refractive index of the third stack has a value between the refractive index of the second substrate and a refractive index of the third color filter.

[0025] According to an embodiment of the present disclosure, a display device includes: a second substrate, on which a first light transmission area, a second light transmission area and a third light transmission area are defined; a first color filter, a second color filter and a third color filter are positioned on the second substrate, the first color filter overlaps with the first light transmission area, the second color filter overlaps with the second light transmission area, and the third color filter overlaps with the third light transmission area; a second stacker, positioned between at least one of the first color filter, the second color filter and the third color filter and the second substrate; and a first stacker, positioned between the second substrate and the second stacker and overlapping with the first light transmission area, the second light transmission area and the third light transmission area, the refractive index of the first stacker having a value between the refractive index of the second substrate and the refractive index of the first color filter, and the refractive index of the first stacker is less than the refractive index of the second stacker.

[0026] The display device may further include a third stack positioned on the second substrate, wherein the third stack is positioned between the second substrate and the third color filter in the third light-transmitting region.

[0027] The third stack extends from the third light-transmitting area to overlap the first light-transmitting area and the second light-transmitting area.

[0028] A refractive index of the third stack has a value between the refractive index of the second substrate and a refractive index of the third color filter.

[0029] The display device may also include: a light-transmitting pattern disposed on the first color filter and overlapping the first light-transmitting area; a first wavelength conversion pattern disposed on the second color filter and overlapping the second light-transmitting area; and a second wavelength conversion pattern positioned on the third color filter and overlapping the third light-transmitting area.

[0030] The first wavelength conversion pattern and the second wavelength conversion pattern include a base resin and wavelength shifters and scatterers dispersed in the base resin, and the wavelength shifters are quantum dots.

[0031] Details of other embodiments are included in the detailed description and accompanying drawings.

[0032] Beneficial Effects

[0033] According to an embodiment of the present disclosure, a color conversion substrate capable of improving display quality by reducing reflectivity of external light can be provided.

[0034] Furthermore, according to the embodiments of the present disclosure, a display device with improved display quality can be provided.

[0035] The effects according to the embodiments are not limited to the contents exemplified above, and more various effects are included in the present disclosure. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] Figure 1 is a schematic perspective view of a display device according to an embodiment;

[0037] Figure 2 It is along Figure 1 A schematic cross-sectional view taken along line AA';

[0038] Figure 3 It is schematically shown Figure 1 and Figure 2 A plan view of a display area of ​​a display substrate of a display device shown in ;

[0039] Figure 4 It is schematically shown Figure 1 and Figure 2 A plan view of a display area of ​​a color conversion substrate of a display device shown in ;

[0040] Figure 5 It is schematically shown Figure 1 and Figure 2 A plan view of another example of a display area of ​​a color conversion substrate of a display device shown in FIG.

[0041] Figure 6 It is along Figure 3 and Figure 4 A cross-sectional view taken along line BB';

[0042] Figure 7 It is schematically shown Figure 6 A plan view of a color pattern of a color conversion substrate shown in ;

[0043] Figure 8 It is schematically shown Figure 6 A plan view of a light blocking member of a color conversion substrate shown in ;

[0044] Fig. 9 It is schematically shown Figure 6 A plan view of a second color filter of the color conversion substrate shown in FIG.

[0045] Fig.10 It is schematically shown Figure 6 A plan view of a light transmissive pattern of a color conversion substrate shown in ;

[0046] Fig.11 is schematically shown along Figure 3and Figure 4 A cross-sectional view of a display device according to another embodiment taken along line BB';

[0047] Fig.12 and Fig.13 is schematically shown along Figure 3 and Figure 4 A cross-sectional view of a display device according to yet another embodiment taken along line BB';

[0048] Fig.14 It is schematically shown Fig.13 A plan view of a first stack of color conversion substrates shown in ;

[0049] Figures 15 to 21 is schematically shown along Figure 3 and Figure 4 A cross-sectional view of a display device according to yet another embodiment taken along line BB';

[0050] Fig. 22 and Fig.23 is schematically shown along Figure 3 and Figure 4 A cross-sectional view of a display device according to yet another embodiment taken along line BB';

[0051] Figures 24 to 30 is schematically shown along Figure 3 and Figure 4 A cross-sectional view of a display device according to yet another embodiment taken along line BB';

[0052] Fig.31 It is schematically shown Fig.30 A plan view of a second stack of color conversion substrates shown in ;

[0053] Fig.32 is schematically shown along Figure 3 and Figure 4 A cross-sectional view of a display device according to yet another embodiment taken along line BB';

[0054] Fig.33 It is schematically shown Fig.32 A plan view of a second stack of color conversion substrates shown in ;

[0055] Figure 34 to Figure 39 It is used to describe manufacturing Fig.32 A view of a method of color conversion substrate shown in;

[0056] Figures 40 to 51 is schematically shown along Figure 3 and Figure 4 A cross-sectional view of a display device according to yet another embodiment taken along line BB';

[0057] Figure 52 to Figure 61 is schematically shown along Figure 3 and Figure 4 A cross-sectional view of a display device according to yet another embodiment taken along line BB';

[0058] Figure 62 to Figure 68 is schematically shown along Figure 3 and Figure 4 A cross-sectional view of a display device according to yet another embodiment taken along line BB';

[0059] Fig.69 is schematically shown along Figure 3 and Figure 4 A cross-sectional view of a display device according to yet another embodiment taken along line BB′; and

[0060] Fig.70 is a graph showing SCI and SCE according to whether the color conversion substrate includes a SiON film. DETAILED DESCRIPTION

[0061] The present invention will now be described more fully hereinafter with reference to the accompanying drawings, in which preferred embodiments of the present invention are shown. However, the present invention may be implemented in different forms and should not be construed as being limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete and will fully convey the scope of the present invention to those skilled in the art.

[0062] It will also be understood that when a layer or substrate is referred to as being “on” another layer or substrate, it can be directly on the other layer or substrate, or intervening layers may also be present. Throughout the specification, the same reference numerals refer to the same components.

[0063] Spatially relative terms (such as "below", "under", "below", "above", "on", etc.) may be used to describe the relationship between one element or component and another element or component as shown in the drawings. Spatially relative terms should be understood as terms that include the orientation shown in the drawings as well as the different orientations of the elements when in use. For example, if the elements shown in the drawings are flipped, an element described as "below" or "beneath" another element may be "above" the other element. Thus, the exemplary term "below" may include both the orientations of "above" and "below".

[0064] Although "first", "second", "third", "fourth", etc. are used to describe various components, these components are not limited by these terms. These terms are only used to distinguish one component from another component. Therefore, in the technical concept of the present invention, the first component mentioned below can be one of the second component, the third component and the fourth component.

[0065] It will be understood that although the terms "first", "second", etc. may be used herein to describe various elements, these elements should not be limited by these terms. These terms are only used to distinguish one element from another element. For example, without departing from the teachings of the present invention, the first element discussed below may be referred to as the second element. Similarly, the second element may also be referred to as the first element.

[0066] Hereinafter, embodiments of the present disclosure will be described with reference to the accompanying drawings.

[0067] Figure 1 is a schematic perspective view of a display device according to an embodiment, and Figure 2 It is along Figure 1 Schematic cross-sectional view taken along line AA'.

[0068] refer to Figure 1 and Figure 2 The display device 1 can be applied to various electronic devices, for example, small and medium-sized electronic devices such as tablet PCs, smart phones, car navigation units, cameras, central information displays (CIDs) provided in cars, wristwatch-type electronic devices, personal digital assistants (PDAs), portable multimedia players (PMPs), and game consoles, large and medium-sized electronic devices such as televisions, external billboards, monitors, personal computers, and notebook computers, etc. These electronic devices are presented only as examples, and the display device 1 may also be used in other electronic devices without departing from the concept of the present disclosure.

[0069] According to an embodiment, 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 D1 and two second sides extending in a second direction D2 intersecting the first direction D1. The angle at which the first side and the second side of the display device 1 intersect may be a right angle, but is not limited thereto, and a curved surface may be formed. According to an embodiment, the first side may be shorter than the second side, but is not limited thereto. The shape of the display device 1 in a plan view is not limited to the shape shown, and a circular shape or other shapes may also be applied.

[0070] The display device 1 may include a display area DA displaying an image and a non-display area NDA not displaying an image. According to an embodiment, the non-display area NDA may be positioned around the display area DA and surround the display area DA.

[0071] Unless otherwise defined, in this document, “on,” “upper side,” “upper part,” “top,” and “upper surface” refer to directions based on the drawings in which arrows in the drawings point to a third direction D3 intersecting the first direction D1 and the second direction D2, and “below,” “lower side,” “lower part,” “bottom,” and “lower surface” refer to directions opposite to the directions pointed by arrows in the third direction D3 based on the drawings.

[0072] A schematic stacking structure of the display device 1 will be described. According to an embodiment, the display device 1 includes a display substrate 10 and a color conversion substrate 30 facing the display substrate 10, and may further include a sealing portion 50 coupling 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.

[0073] The display substrate 10 may include devices and circuits for displaying images, for example, pixel circuits such as switching elements, pixel defining films that define light-emitting areas and non-light-emitting areas to be described later in the display area DA, and self-luminous elements. According to an embodiment, the self-luminous element may include at least one of an organic light-emitting diode, a quantum dot light-emitting diode, a micro light-emitting diode based on an inorganic material (e.g., a micro-LED), and a nano light-emitting diode based on an inorganic material (e.g., a nano-LED). Hereinafter, for ease of explanation, the case where the self-luminous element is an organic light-emitting diode will be described by way of example.

[0074] The color conversion substrate 30 may be positioned on the display substrate 10 and may face the display substrate 10. According to an embodiment, the color conversion substrate 30 may include a color conversion pattern for converting the color of incident light. According to an embodiment, the color conversion pattern may include at least one of a color filter and a wavelength conversion pattern.

[0075] The sealing portion 50 may be positioned between the display substrate 10 and the color conversion substrate 30 in the non-display area NDA. The sealing portion 50 may be disposed 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 may be coupled to each other through the sealing portion 50.

[0076] According to an embodiment, the sealing portion 50 may be made of an organic material. For example, the sealing portion 50 may be made of epoxy resin, but is not limited thereto.

[0077] Filler 70 may be positioned in a space between display substrate 10 and color conversion substrate 30 that is surrounded by sealing portion 50. Filler 70 may be filled between display substrate 10 and color conversion substrate 30.

[0078] According to an embodiment, the filler 70 may be made of a material that can transmit light. According to an embodiment, the filler 70 may be made of an organic material. For example, the filler 70 may be made of a silicon organic material or an epoxy organic material, etc., but is not limited thereto. According to another embodiment, the filler 70 may be omitted.

[0079] Figure 3 It is schematically shown Figure 1 and Figure 2 A plan view of a display area of ​​a display substrate of a display device shown in FIG. Figure 4 It is schematically shown Figure 1 and Figure 2 1 is a plan view of a display area of ​​a color conversion substrate of a display device shown in FIG.

[0080] Apart from Figure 1 and Figure 2 In addition, refer to Figure 3 and Figure 4 , a plurality of light emitting areas LA1, LA2, LA3, LA4, LA5, and LA6 and a non-light emitting area NLA may be defined in the display area DA of the display substrate 10. The light emitting areas LA1, LA2, LA3, LA4, LA5, and LA6 may be areas in which light generated by the light emitting elements of the display substrate 10 is emitted to the outside of the display substrate 10, and the non-light emitting area NLA may be an area in which light is not emitted to the outside of the display substrate 10.

[0081] According to an embodiment, the light emitted from the display substrate 10 to the color conversion substrate 30 in each of the light emitting areas LA1, LA2, LA3, LA4, LA5, and LA6 may be light of a first color. According to an embodiment, the light of the first color may be blue light and may have a peak wavelength in the range of about 440 nm to about 480 nm. The peak wavelength may refer to a wavelength at which the intensity is maximized within a wavelength region.

[0082] According to an embodiment, the first light emitting area LA1, the second light emitting area LA2, and the third light emitting area LA3 may be sequentially and repeatedly disposed along the first direction D1 in a first row RL1 of the display area DA of the display substrate 10. In addition, the fourth light emitting area LA4, the fifth light emitting area LA5, and the sixth light emitting area LA6 may be sequentially and repeatedly disposed along the first direction D1 in a second row RL2 adjacent to the first row RL1 along the second direction D2.

[0083] According to an embodiment, the first light emitting area LA1 may have a predetermined first width WL1 in the first direction D1, the second light emitting area LA2 may have a predetermined second width WL2 in the first direction D1, and the third light emitting area LA3 may have a predetermined third width WL3 in the first direction D1. The first width WL1 of the first light emitting area LA1 may be smaller than the second width WL2 of the second light emitting area LA2 and the third width WL3 of the third light emitting area LA3. According to an embodiment, the second width WL2 of the second light emitting area LA2 and the third width WL3 of the third light emitting area LA3 may also be different from each other. In addition, the second width WL2 of the second light emitting area LA2 may be wider than the third width WL3 of the third light emitting area LA3. In addition, the area of ​​the first light emitting area LA1 may be smaller than the area of ​​the second light emitting area LA2 and the area of ​​the third light emitting area LA3. The area of ​​the second light emitting area LA2 may be larger than the area of ​​the third light emitting area LA3. However, the embodiment is not limited to the above example, and for example, the area of ​​the second light emitting area LA2 may be smaller than the area of ​​the third light emitting area LA3.

[0084] According to another embodiment, the first width WL1 of the first light emitting region LA1, the second width WL2 of the second light emitting region LA2, and the third width WL3 of the third light emitting region LA3 may be substantially the same. According to another embodiment, the area of ​​the first light emitting region LA1, the area of ​​the second light emitting region LA2, and the area of ​​the third light emitting region LA3 may also be substantially the same.

[0085] The fourth light emitting area LA4 adjacent to the first light emitting area LA1 in the second direction D2 may be different from the first light emitting area LA1 only in that it is positioned in the second row RL2, and may have a width, an area, and a structure of components disposed therein that are substantially the same as those of the first light emitting area LA1. Similarly, the fifth light emitting area LA5 adjacent to the second light emitting area LA2 in the second direction D2 may have a structure substantially the same as that of the second light emitting area LA2, and the sixth light emitting area LA6 adjacent to the third light emitting area LA3 in the second direction D2 may have a structure substantially the same as that of the third light emitting area LA3.

[0086] A plurality of light-transmitting areas TA1, TA2, TA3, TA4, TA5, and TA6 and a light-blocking area BA may be defined in the display area DA of the color conversion substrate 30. The light-transmitting areas TA1, TA2, TA3, TA4, TA5, and TA6 may be areas in which light emitted from the display substrate 10 is transmitted through the color conversion substrate 30 and provided to the outside of the display device 1. The light-blocking area BA may be an area through which light emitted from the display substrate 10 is not transmitted.

[0087] According to an embodiment, the first light transmission area TA1, the second light transmission area TA2, and the third light transmission area TA3 may be sequentially and repeatedly disposed along the first direction D1 in the first row RT1 of the display area DA of the color conversion substrate 30. The first light transmission area TA1 may correspond to the first light emitting area LA1 or overlap the first light emitting area LA1. Similarly, the second light transmission area TA2 may correspond to the second light emitting area LA2 or overlap the second light emitting area LA2, and the third light transmission area TA3 may correspond to the third light emitting area LA3 or overlap the third light emitting area LA3.

[0088] According to an embodiment, the light of the first color provided from the display substrate 10 may be transmitted through the first light transmission area TA1, the second light transmission area TA2, and the third light transmission area TA3, and provided to the outside of the display device 1. When the light emitted from the first light transmission area TA1 to the outside of the display device 1 is referred to as the first emission light, the light emitted from the second light transmission area TA2 to the outside of the display device 1 is referred to as the second emission light, and the light emitted from the third light transmission area TA3 to the outside of the display device 1 is referred to as the third emission light, the first emission light may be the light of the first color, the second emission light may be the light of the second color different from the first color, and the third emission light may be the light of the third color different from the first color and the second color. According to an embodiment, the light of the first color may be the blue light having a peak wavelength in the range of about 440nm to about 480nm as described above, and the light of the second color may be the red light having a peak wavelength in the range of about 610nm to about 650nm. In addition, the light of the third color may be the green light having a peak wavelength in the range of about 510nm to about 550nm. However, the present disclosure is not limited thereto, and the light of the second color may be green light, and the light of the third color may be red light.

[0089] The fourth light transmission area TA4, the fifth light transmission area TA5, and the sixth light transmission area TA6 may be sequentially and repeatedly arranged along the first direction D1 in the second row RT2 adjacent to the first row RT1 along the second direction D2. The fourth light transmission area TA4 may correspond to the fourth light-emitting area LA4 or overlap with the fourth light-emitting area LA4, the fifth light transmission area TA5 may correspond to the fifth light-emitting area LA5 or overlap with the fifth light-emitting area LA5, and the sixth light transmission area TA6 may correspond to the sixth light-emitting area LA6 or overlap with the sixth light-emitting area LA6.

[0090] According to an embodiment, the first light transmission area TA1 may have a predetermined first width WT1 in the first direction D1, the second light transmission area TA2 may have a predetermined second width WT2 in the first direction D1, and the third light transmission area TA3 may have a predetermined third width WT3 in the first direction D1. The first width WT1 of the first light transmission area TA1 may be smaller than the second width WT2 of the second light transmission area TA2 and the third width WT3 of the third light transmission area TA3. According to an embodiment, the second width WT2 of the second light transmission area TA2 and the third width WT3 of the third light transmission area TA3 may also be different from each other. The second width WT2 of the second light transmission area TA2 may be wider or narrower than the third width WT3 of the third light transmission area TA3. In addition, according to an embodiment, the area of ​​the first light transmission area TA1 may be smaller than the area of ​​the second light transmission area TA2 and the area of ​​the third light transmission area TA3, or may be larger than the area of ​​the second light transmission area TA2 and the area of ​​the third light transmission area TA3.

[0091] However, the present invention is not limited to the above examples. According to another embodiment, the first width WT1 of the first light transmission area TA1, the second width WT2 of the second light transmission area TA2, and the third width WT3 of the third light transmission area TA3 may be substantially the same. According to another embodiment, the area of ​​the first light transmission area TA1 may also be substantially the same as the area of ​​the second light transmission area TA2 and the area of ​​the third light transmission area TA3.

[0092] The first light transmission area TA1 and the fourth light transmission area TA4 adjacent to each other in the second direction D2 may have substantially the same width, area, structure of components disposed therein, and color of light emitted to the outside of the display device 1. Similarly, the second light transmission area TA2 and the fifth light transmission area TA5 adjacent to each other in the second direction D2 may have substantially the same structure, and may also have substantially the same color of light emitted to the outside of the display device 1. In addition, the third light transmission area TA3 and the sixth light transmission area TA6 adjacent to each other in the second direction D2 may have substantially the same structure, and may also have substantially the same color of light emitted to the outside of the display device 1.

[0093] The light blocking area BA may be positioned in the display area DA around the light transmitting areas TA1, TA2, TA3, TA4, TA5, and TA6 of the color conversion substrate 30. According to an embodiment, when the light blocking area BA is divided by area, the light blocking area BA may include a first light blocking area BA1, a second light blocking area BA2, a third light blocking area BA3, a fourth light blocking area BA4, a fifth light blocking area BA5, a sixth light blocking area BA6, and a seventh light blocking area BA7.

[0094] The first light blocking area BA1 may be positioned between the first light transmission area TA1 and the second light transmission area TA2, the second light blocking area BA2 may be positioned between the second light transmission area TA2 and the third light transmission area TA3, and the third light blocking area BA3 may be positioned between the third light transmission area TA3 and the first light transmission area TA1 adjacent to the third light transmission area TA3.

[0095] The fourth light blocking area BA4 can be positioned between the fourth light transmission area TA4 and the fifth light transmission area TA5, the fifth light blocking area BA5 can be positioned between the fifth light transmission area TA5 and the sixth light transmission area TA6, and the sixth light blocking area BA6 can be positioned between the sixth light transmission area TA6 and the fourth light transmission area TA4 adjacent to the sixth light transmission area TA6.

[0096] The seventh light-blocking area BA7 may be positioned between the first and second rows RT1 and RT2 adjacent in the second direction D2.

[0097] Figure 5 It is schematically shown Figure 1 and Figure 2 0 is a plan view of another example of a display area of ​​a color conversion substrate of a display device shown in FIG.

[0098] Figure 5 The color conversion substrate 30 and Figure 3 and Figure 4 The color conversion substrate of the embodiment is different in that the arrangement and shape of the plurality of light transmission areas TA1, TA2, TA3, TA4, TA5, and TA6 are different.

[0099] refer to Figure 5 , the first light transmission area TA1 may be disposed between the second light transmission area TA2 and the third light transmission area TA3. The second light transmission area TA2 and the third light transmission area TA3 may be sequentially and repeatedly disposed along the first direction D1. At least a portion of the first light transmission area TA1 may be disposed between the second light transmission area TA2 and the third light transmission area TA3, and the remaining portion of the first light transmission area TA1 may be disposed to protrude relative to the second light transmission area TA2 and the third light transmission area TA3 in the second direction D2. For example, a line connecting the center point of each of the first light transmission area TA1, the second light transmission area TA2, and the third light transmission area TA3 may have a triangular shape.

[0100] Among the plurality of light transmission areas TA1 to TA6, three light transmission areas may form one unit and may be repeatedly disposed in the first direction D1 and the second direction D2. For example, in the first row, the first light transmission area TA1, the second light transmission area TA2, and the third light transmission area TA3 may be repeatedly disposed in the first direction D1 as a unit. In the second row, the fourth light transmission area TA4, the fifth light transmission area TA5, and the sixth light transmission area TA6 may be repeatedly disposed in the first direction D1 as a unit.

[0101] A plurality of light blocking areas BA1 to BA7 may be defined between the plurality of light transmission areas TA1 to TA6. According to an exemplary embodiment, the first light blocking area BA1 may be positioned between the first light transmission area TA1 and the second light transmission area TA2, the second light blocking area BA2 may be positioned between the second light transmission area TA2 and the third light transmission area TA3, and the third light blocking area BA3 may be positioned between the third light transmission area TA3 and the first light transmission area TA1 adjacent to the third light transmission area TA3. The fourth light blocking area BA4 may be positioned between the fourth light transmission area TA4 and the fifth light transmission area TA5, the fifth light blocking area BA5 may be positioned between the fifth light transmission area TA5 and the sixth light transmission area TA6, and the sixth light blocking area BA6 may be positioned between the sixth light transmission area TA6 and the fourth light transmission area TA4 adjacent to the sixth light transmission area TA6. The seventh light blocking area BA7 may be positioned between the first row RT1 and the second row RT2 adjacent in the second direction D2.

[0102] Hereinafter, the structure of the display device 1 will be described in more detail.

[0103] Figure 6 It is along Figure 3 and Figure 4 A cross-sectional view taken along line BB' of Figure 7 It is schematically shown Figure 6 A plan view of the color pattern of the color conversion substrate shown in FIG. Figure 8 It is schematically shown Figure 6 A plan view of a light blocking member of a color conversion substrate shown in, Fig. 9 It is schematically shown Figure 6 A plan view of a second color filter of the color conversion substrate shown in FIG. Fig.10 It is schematically shown Figure 6 A plan view of a light-transmitting pattern of a color conversion substrate shown in FIG. Figure 6 The cross-section shown in FIG. Figure 3 and Figure 4 The cross-sectional view is not taken along the line BB', but can be compared with the cross-sectional view taken along the line Figure 5The cross-sectional view taken along the line G-G' has the same structure. Therefore, Figure 6 Can also be applied to Figure 5 cross-sectional structure.

[0104] refer to Figure 3 and Figure 6 , the display device 1 may include a display substrate 10 , a color conversion substrate 30 facing the display substrate 10 , and a filler 70 positioned between the display substrate 10 and the color conversion substrate 30 described above.

[0105] The display substrate 10 may include a first substrate 110. The first substrate 110 may be an insulating substrate. The first substrate 110 may include a transparent material. For example, the first substrate 110 may include a transparent insulating material such as glass or quartz. The first substrate 110 may be a rigid substrate. However, the first substrate 110 is not limited thereto, and may include a plastic such as polyimide, and may have a flexible property that can be bent, folded, or curled. As described above, a plurality of light emitting areas LA1, LA2, LA3, LA4, LA5, and LA6 and a non-light emitting area NLA may be defined in the first substrate 110.

[0106] The switching elements T1, T2, and T3 may be positioned on the first substrate 110. According to an embodiment, the first switching element T1 may be positioned in the first light emitting area LA1 of the first substrate 110, the second switching element T2 may be positioned in the second light emitting area LA2 of the first substrate 110, and the third switching element T3 may be positioned in the third light emitting area LA3 of the first substrate 110. However, the present disclosure is not limited thereto. According to another embodiment, at least one of the first switching element T1, the second switching element T2, and the third switching element T3 may also be positioned in the non-light emitting area NLA.

[0107] According to an embodiment, each of the first switching element T1, the second switching element T2, and the third switching element T3 may be a thin film transistor including amorphous silicon, polycrystalline silicon, or an oxide semiconductor. Although not shown in the drawings, a plurality of signal lines (e.g., gate lines, data lines, power lines, etc.) that transmit signals to each switching element may be further positioned on the first substrate 110.

[0108] The insulating film 130 may be positioned on the first switching element T1, the second switching element T2, and the third switching element T3. According to an embodiment, the insulating film 130 may be a planarization film. According to an embodiment, the insulating film 130 may be formed of an organic film. For example, the insulating film 130 may include an acrylic resin, an epoxy resin, an imide resin, an ester resin, or the like. According to an embodiment, the insulating film 130 may include a positive photosensitive material or a negative photosensitive material.

[0109] The first anode electrode AE1, the second anode electrode AE2, and the third anode electrode AE3 may be positioned on the insulating film 130. The first anode electrode AE1 may be positioned in the first light emitting area LA1, but at least a portion of the first anode electrode AE1 may extend to the non-light emitting area NLA. The second anode electrode AE2 may be positioned in the second light emitting area LA2, but at least a portion of the second anode electrode AE2 may extend to the non-light emitting area NLA. The third anode electrode AE3 may be positioned in the third light emitting area LA3, but at least a portion of the third anode electrode AE3 may extend to the non-light emitting area NLA. The first anode electrode AE1 may pass through the insulating film 130 and be connected to the first switching element T1, the second anode electrode AE2 may pass through the insulating film 130 and be connected to the second switching element T2, and the third anode electrode AE3 may pass through the insulating film 130 and be connected to the third switching element T3.

[0110] According to an embodiment, the width or area of ​​the first anode electrode AE1, the width or area of ​​the second anode electrode AE2, and the width or area of ​​the third anode electrode AE3 may be different from each other. For example, the width of the first anode electrode AE1 may be smaller than the width of the second anode electrode AE2, and the width of the third anode electrode AE3 may be smaller than the width of the second anode electrode AE2 and larger than the width of the first anode electrode AE1. Alternatively, the area of ​​the first anode electrode AE1 may be smaller than the area of ​​the second anode electrode AE2, and the area of ​​the third anode electrode AE3 may be smaller than the area of ​​the second anode electrode AE2 and larger than the area of ​​the first anode electrode AE1. Alternatively, the area of ​​the first anode electrode AE1 may be smaller than the area of ​​the second anode electrode AE2, and the area of ​​the third anode electrode AE3 may be larger than the area of ​​the second anode electrode AE2 and the area of ​​the first anode electrode AE1. However, the present disclosure is not limited to the above embodiment. According to another embodiment, the width or area of ​​the first anode electrode AE1, the width or area of ​​the second anode electrode AE2, and the width or area of ​​the third anode electrode AE3 may be substantially the same.

[0111] The first anode electrode AE1, the second anode electrode AE2, and the third anode electrode AE3 may be reflective electrodes. The first anode electrode AE1, the second anode electrode AE2, and the third anode electrode AE3 may have a stacked film structure in which indium tin oxide (ITO), indium zinc oxide (IZO), zinc oxide (ZnO), or indium oxide (In 2 O 3) and a reflective material layer made of silver (Ag), magnesium (Mg), aluminum (Al), platinum (Pt), lead (Pd), gold (Au), nickel (Ni), neodymium (Nd), iridium (Ir), chromium (Cr), lithium (Li), calcium (Ca) or a mixture thereof. The material layer with a high work function may be disposed on a layer above the reflective material layer to be disposed close to the light emitting layer OL. The first anode electrode AE1, the second anode electrode AE2, and the third anode electrode AE3 may have ITO / Mg, ITO / MgF 2 , ITO / Ag or ITO / Ag / ITO multilayer structure, but not limited thereto.

[0112] The pixel defining film 150 may be positioned on the first anode electrode AE1, the second anode electrode AE2, and the third anode electrode AE3. The pixel defining film 150 may include an opening exposing the first anode electrode AE1, an opening exposing the second anode electrode AE2, and an opening exposing the third anode electrode AE3, and may define a first light emitting area LA1, a second light emitting area LA2, a third light emitting area LA3, and a non-light emitting area NLA. That is, the area of ​​the first anode electrode AE1 that is not covered by the pixel defining film 150 and is exposed may be the first light emitting area LA1. The area of ​​the second anode electrode AE2 that is not covered by the pixel defining film 150 and is exposed may be the second light emitting area LA2. The area of ​​the third anode electrode AE3 that is not covered by the pixel defining film 150 and is exposed may be the third light emitting area LA3. Another area where the pixel defining film 150 is positioned may be the non-light emitting area NLA.

[0113] The pixel defining film 150 may include an organic insulating material such as polyacrylate resin, epoxy resin, phenol resin, polyamide resin, polyimide resin, unsaturated polyester resin, polyphenylene resin, polyphenylene sulfide resin, or benzocyclobutene (BCB).

[0114] According to an embodiment, the pixel defining film 150 may overlap with a light blocking member of the color conversion substrate 30 to be described later. For example, the pixel defining film 150 may overlap with the first light blocking member 221, the second light blocking member 222, and the third light blocking member 223. The light emitting layer OL may be positioned on the first anode electrode AE1, the second anode electrode AE2, and the third anode electrode AE3. In an embodiment in which the display device 1 is an organic light emitting diode display device, the light emitting layer OL may include an organic layer including an organic material. The organic layer may include an organic light emitting layer, and in some cases may also include at least one of a hole injection layer, a hole transport layer, an electron transport layer, and an electron injection layer as an auxiliary layer for auxiliary light emission. According to another embodiment, when the display device 1 is a micro LED display device or a nano LED display device, the light emitting layer OL may include an inorganic material such as an inorganic semiconductor.

[0115] According to an embodiment, the light emitting layer OL may have a tandem structure including a plurality of organic light emitting layers arranged to overlap each other in a thickness direction and a charge generation layer arranged between the plurality of organic light emitting layers. The respective organic light emitting layers arranged to overlap each other may emit light of the same wavelength or emit light of different wavelengths.

[0116] According to an embodiment, the light emitting layer OL may have a continuous film shape formed across the plurality of light emitting regions LA1, LA2, LA3, LA4, LA5, and LA6 and the non-light emitting region NLA. In this case, the wavelength of light emitted by the light emitting layer OL may be the same. For example, the light emitting layer OL may emit blue light or ultraviolet light from the plurality of light emitting regions LA1, LA2, LA3, LA4, LA5, and LA6.

[0117] According to another embodiment, the light emitting layer OL may have a film shape patterned for each of the plurality of light emitting regions LA1, LA2, LA3, LA4, LA5, and LA6. In this case, the wavelength of light emitted by each light emitting layer OL may be different for each of the plurality of light emitting regions LA1, LA2, and LA3. For example, the first light emitting region LA1 may emit a first color, the second light emitting region LA2 may emit a second color, and the third light emitting region LA3 may emit a third color.

[0118] The cathode electrode CE may be positioned on the light emitting layer OL. According to an embodiment, the cathode electrode CE may be semi-transmissive or transmissive. When the cathode electrode CE has semi-transmissivity, the cathode electrode CE may include Ag, Mg, Cu, Al, Pt, Pd, Au, Ni, Nd, Ir, Cr, Li, Ca, LiF, Mo, Ti, or a compound or mixture thereof (e.g., a mixture of Ag and Mg), or have a multilayer structure material such as LiF / Ca or LiF / Al. In addition, when the cathode electrode CE has a thickness of tens to hundreds of angstroms, the cathode electrode CE may have semi-transmissivity.

[0119] When the cathode electrode CE has transmissivity, the cathode electrode CE may include a transparent conductive oxide (TCO). For example, the cathode electrode CE may include tungsten oxide (W x O x ), titanium oxide (TiO 2 ), indium tin oxide (ITO), indium zinc oxide (IZO), zinc oxide (ZnO), indium tin zinc oxide (ITZO) or magnesium oxide (MgO), etc.

[0120] The first anode electrode AE1, the light emitting layer OL, and the cathode electrode CE may constitute a first light emitting element ED1, the second anode electrode AE2, the light emitting layer OL, and the cathode electrode CE may constitute a second light emitting element ED2, and the third anode electrode AE3, the light emitting layer OL, and the cathode electrode CE may 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 may emit source light, and the source light may be provided to the color conversion substrate 30.

[0121] The thin film encapsulation layer 170 may be positioned on the cathode electrode CE. The thin film encapsulation layer 170 is commonly disposed in the first light emitting area LA1, the second light emitting area LA2, the third light emitting area LA3, and the non-light emitting area NLA. According to an embodiment, the thin film encapsulation layer 170 may directly cover the cathode electrode CE. A cover layer (not shown) covering the cathode electrode CE may be further disposed between the thin film encapsulation layer 170 and the cathode electrode CE, and in this case, the thin film encapsulation layer 170 may directly cover the cover layer.

[0122] According to an embodiment, the thin film encapsulation layer 170 may include a first encapsulation inorganic film 171 , an encapsulation organic film 173 , and a second encapsulation inorganic film 175 sequentially stacked on the cathode electrode CE.

[0123] Each of the first encapsulation inorganic film 171 and the second encapsulation inorganic film 175 may include 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), lithium fluoride, etc. The encapsulation organic film 173 may include acrylic resin, methacrylic resin, polyisoprene, vinyl resin, epoxy resin, polyurethane resin, cellulose resin, perylene resin, etc.

[0124] However, the structure of the thin film encapsulation layer 170 is not limited to the above example, and the stack structure of the thin film encapsulation layer 170 may be variously changed.

[0125] Meanwhile, the color conversion substrate 30 may be positioned to face the display substrate 10 described above.

[0126] Specifically, refer to Figure 6 and Figure 7, the color conversion substrate 30 may include a second substrate 310. The second substrate 310 may be an insulating substrate. The second substrate 310 may include a transparent material. For example, the second substrate 310 may include a transparent insulating material such as glass or quartz. The second substrate 310 may be a rigid substrate. However, the second substrate 310 is not limited thereto, and may include a plastic such as polyimide, and may have a flexible property that can be bent, bent, folded, or curled. As described above, a plurality of light-transmitting areas TA1, TA2, TA3, TA4, TA5, and TA6 and a light-blocking area BA may be defined in the second substrate 310.

[0127] The first color filter 231 and the color pattern 250 may be positioned on one surface of the second substrate 310 facing the display substrate 10 .

[0128] The first color filter 231 may be disposed on one surface of the second substrate 310 and may overlap the first light transmission area TA1 and the fourth light transmission area TA4. According to an embodiment, the first color filter 231 overlapping the first light transmission area TA1 and the first color filter 231 overlapping the fourth light transmission area TA4 may be spaced apart from each other in the second direction D2. According to an embodiment, a seventh color pattern 257 to be described later may be positioned between the first color filter 231 overlapping the first light transmission area TA1 and the first color filter 231 overlapping the fourth light transmission area TA4. According to an embodiment, the seventh color pattern 257 may be connected to the first color filter 231 overlapping the first light transmission area TA1 and the first color filter 231 overlapping the fourth light transmission area TA4.

[0129] The first color filter 231 may selectively transmit light of a first color (e.g., blue light) and block or absorb light of a second color (e.g., red light) and light of a third color (e.g., green light). According to an embodiment, the first color filter 231 may be a blue color filter and may include a blue colorant such as a blue dye or a blue pigment. In this article, a colorant is a concept including both a dye and a pigment.

[0130] The color pattern 250 can absorb a portion of the light incident on the color conversion substrate 30 from the outside of the display device 1 to reduce the reflected light caused by the external light. In the display device of the related art, a significant portion of the external light is reflected, resulting in a problem of distortion of the color reproduction rate of the color conversion substrate. However, according to the present embodiment, when the color pattern 250 is provided on the second substrate 310, the amount of reflected external light can be reduced, and the color distortion caused by the external light can be reduced.

[0131] According to an embodiment, the color pattern 250 may include a blue colorant, such as a blue dye or a blue pigment. According to an embodiment, the color pattern 250 may be made of the same material as the first color filter 231, and may be formed simultaneously during the formation of the first color filter 231. That is, the first color filter 231 and the color pattern 250 may be formed simultaneously by coating a photosensitive organic material including a blue colorant on one surface of the second substrate 310 and exposing and developing the photosensitive organic material.

[0132] According to an embodiment, the thickness TH2 of the color pattern 250 measured along the third direction D3 may be substantially the same as the thickness TH1 of the first color filter 231. When the color pattern 250 includes a blue colorant, the external light or reflected light transmitted through the color pattern 250 has a blue wavelength band. The color sensitivity of the eyes perceived by the user's eyes is different depending on the color of the light. More specifically, the light of the blue wavelength band may be less sensitively perceived by the user than the light of the green wavelength band and the light of the red wavelength band. Therefore, since the color pattern 250 includes a blue colorant, the user can perceive the reflected light relatively less sensitively.

[0133] The color pattern 250 may be positioned on one surface of the second substrate 310 and overlap the light blocking area BA. In addition, the color pattern 250 may overlap the non-light emitting area NLA. According to an embodiment, the color pattern 250 may be in direct contact with one surface of the second substrate 310. Alternatively, when a different buffer layer for preventing the inflow of impurities is provided on one surface of the second substrate 310, the color pattern 250 may be in direct contact with the buffer layer.

[0134] like Figure 7 As shown in , according to an embodiment, the color pattern 250 may be disposed on the entire light blocking area BA. The color pattern 250 may include a first color pattern 251 overlapping the first light blocking area BA1, a second color pattern 252 overlapping the second light blocking area BA2, a third color pattern 253 overlapping the third light blocking area BA3, a fourth color pattern 254 overlapping the fourth light blocking area BA4, a fifth color pattern 255 overlapping the fifth light blocking area BA5, a sixth color pattern 256 overlapping the sixth light blocking area BA6, and a seventh color pattern 257 overlapping the seventh light blocking area BA7. According to an embodiment, the seventh color pattern 257 may be connected to the first color pattern 251, the second color pattern 252, the third color pattern 253, the fourth color pattern 254, the fifth color pattern 255, and the sixth color pattern 256. In addition, the color pattern 250 may be connected to the first color filter 231.

[0135] refer to Figure 6 and Figure 8, the light blocking member 220 may be positioned on one surface of the second substrate 310 facing the display substrate 10. The light blocking member 220 may overlap the light blocking area BA to block the transmission of light. Figure 8 As shown in FIG. 2 , the light blocking members 220 may be arranged in a substantially grid shape in a plan view.

[0136] According to an embodiment, the light blocking member 220 may include an organic light blocking material and may be formed by a process of coating and exposing the organic light blocking material. The light blocking member 220 may include a dye or pigment having a light blocking property and may be a black matrix.

[0137] As described above, external light may cause a problem of distorting the color reproduction rate of the color conversion panel. However, according to the present embodiment, when the light blocking member 220 is positioned on the second substrate 310, at least a portion of the external light is absorbed by the light blocking member 220. Therefore, the color distortion caused by the reflection of the external light can be reduced. According to the embodiment, the light blocking member 220 can prevent color mixing due to the penetration of light between adjacent light transmission areas, thereby further improving the color reproduction rate.

[0138] like Figure 6 , Figure 7 and Figure 8 As shown in , according to an embodiment, the light blocking member 220 may include a first light blocking member 221 overlapping the first light blocking area BA1, a second light blocking member 222 overlapping the second light blocking area BA2, a third light blocking member 223 overlapping the third light blocking area BA3, a fourth light blocking member 224 overlapping the fourth light blocking area BA4, a fifth light blocking member 225 overlapping the fifth light blocking area BA5, a sixth light blocking member 226 overlapping the sixth light blocking area BA6, and a seventh light blocking member 227 overlapping the seventh light blocking area BA7. The first light blocking member 221, the second light blocking member 222, and the third light blocking member 223 may be connected to the seventh light blocking member 227, and the fourth light blocking member 224, the fifth light blocking member 225, and the sixth light blocking member 226 may also be connected to the seventh light blocking member 227.

[0139] The light blocking member 220 may be positioned on the color pattern 250. According to an embodiment, the first light blocking member 221 may be positioned on the first color pattern 251, the second light blocking member 222 may be positioned on the second color pattern 252, the third light blocking member 223 may be positioned on the third color pattern 253, the fourth light blocking member 224 may be positioned on the fourth color pattern 254, the fifth light blocking member 225 may be positioned on the fifth color pattern 255, the sixth light blocking member 226 may be positioned on the sixth color pattern 256, and the seventh light blocking member 227 may be positioned on the seventh color pattern 257.

[0140] Since the color pattern 250 is positioned between the light blocking member 220 and the second substrate 310 , according to an embodiment, the light blocking member 220 may not be in contact with the second substrate 310 .

[0141] like Figure 6 and Fig. 9 As shown in FIG. 1 , the second color filter 233 and the third color filter 235 may be positioned on one surface of the second substrate 310 facing the display substrate 10 .

[0142] The second color filter 233 may overlap each of the second light transmission area TA2 and the fifth light transmission area TA5 , and the third color filter 235 may overlap each of the third light transmission area TA3 and the sixth light transmission area TA6 .

[0143] According to an embodiment, Figure 6 As shown in FIG, one side of the second color filter 233 may overlap the first light blocking area BA1 and may be positioned on the first color pattern 251 and the first light blocking member 221. The other side of the second color filter 233 may overlap the second light blocking area BA2 and may be positioned on the second color pattern 252 and the second light blocking member 222.

[0144] According to an embodiment, one side of the third color filter 235 may overlap the second light blocking area BA2 and may be positioned on the second color pattern 252 and the second light blocking member 222. In addition, the other side of the third color filter 235 may overlap the third light blocking area BA3 and may be positioned on the third color pattern 253 and the third light blocking member 223.

[0145] According to an embodiment, Fig. 9As shown in , each of the second color filter 233 and the third color filter 235 may be formed in a stripe shape extending in the second direction D2, and may intersect with the seventh light blocking area BA7 between the first row RT1 and the second row RT2. Therefore, in the seventh light blocking area BA7, the second color filter 233 and the third color filter 235 may be positioned on the seventh light blocking member 227, and in the seventh light blocking area BA7, the second color filter 233 and the third color filter 235 may cover the seventh color pattern 257 and the seventh light blocking member 227 in the third direction D3, respectively. However, the present disclosure is not limited thereto, and according to another embodiment, at least one of the second color filter 233 and the third color filter 235 may be formed in the form of an island pattern spaced apart from each other in the second direction D2.

[0146] The second color filter 233 may block or absorb light of the first color (e.g., blue light). That is, the second color filter 233 may be used as a blue light blocking filter that blocks blue light. The second color filter 233 may selectively transmit light of the second color (e.g., red light) and block or absorb light of the first color and light of the third color (e.g., green light). For example, the second color filter 233 may be a red color filter and may include a red colorant such as a red dye or a red pigment.

[0147] The third color filter 235 may block or absorb the light of the first color. That is, the third color filter 235 may also be used as a blue light blocking filter. The third color filter 235 may selectively transmit the light of the third color and block or absorb the light of the first color and the light of the second color. For example, the third color filter 235 may be a green color filter and may include a green colorant, such as a green dye or a green pigment.

[0148] like Figure 6 , Figure 7 and Figure 8 As shown in FIG, a first covering layer 391 covering the light blocking member 220, the color pattern 250, the first color filter 231, the second color filter 233, and the third color filter 235 may be positioned on one surface of the second substrate 310. The first covering layer 391 may prevent impurities such as moisture or air from penetrating from the outside to damage or contaminate the first color filter 231, the second color filter 233, and the third color filter 235. In addition, the first covering layer 391 may prevent the colorant of the first color filter 231, the colorant of the second color filter 233, and the colorant of the third color filter 235 from diffusing into other components.

[0149] The first cover layer 391 may be in contact with one surface ( Figure 6In addition, the first covering layer 391 may be in direct contact with one surface ( Figure 6 For example, in the first light blocking area BA1, the first light blocking member 221 may be in direct contact with the first cover layer 391, in the second light blocking area BA2, the second light blocking member 222 may be in contact with the first cover layer 391, and in the third light blocking area BA3, the third light blocking member 223 may be in contact with the first cover layer 391.

[0150] The first capping layer 391 may be made of an inorganic material, for example, silicon nitride, aluminum nitride, zirconium nitride, titanium nitride, hafnium nitride, tantalum nitride, silicon oxide, aluminum oxide, titanium oxide, tin oxide, and silicon oxynitride.

[0151] like Figure 6 and Fig.10 As shown in , the light-transmitting pattern 330 may be positioned on the first cover layer 391 .

[0152] According to an embodiment, the light transmissive pattern 330 may be formed by applying a photosensitive material and exposing and developing the photosensitive material. However, the present disclosure is not limited thereto, and the light transmissive pattern 330, the first wavelength conversion pattern 340, and the second wavelength conversion pattern 350 may also be formed by an inkjet method.

[0153] The light-transmitting pattern 330 may be disposed on the first cover layer 391 and may overlap the first light-transmitting area TA1 and the fourth light-transmitting area TA4. Fig.10 As shown in , the light-transmitting pattern 330 may be formed in a stripe shape extending in the second direction D2, and may intersect with the seventh light-blocking area BA7 between the first row RT1 and the second row RT2. However, the present disclosure is not limited thereto, and according to another embodiment, the light-transmitting pattern 330 may also be formed in a structure in which a portion overlapping with the first light-transmitting area TA1 and a portion overlapping with the fourth light-transmitting area TA4 are spaced apart from each other (e.g., in the form of an island pattern).

[0154] The light-transmitting pattern 330 may transmit incident light. As described above, the source light provided from the first light-emitting element ED1 may be blue light. The source light L1 as blue light is transmitted through the light-transmitting pattern 330 and the first color filter 231 and emitted to the outside of the display device 1. That is, the first light La emitted from the first light-transmitting area TA1 may be blue light.

[0155] According to an embodiment, the light-transmitting pattern 330 may include a first base resin 331 , and may further include a first scatterer 333 dispersed in the first base resin 331 .

[0156] The first matrix resin 331 may be made of a material having high light transmittance. According to an embodiment, the first matrix resin 331 may be made of an organic material. For example, the first matrix resin 331 may include an organic material such as epoxy resin, acrylic resin, cardo resin, or imide resin.

[0157] The first scatterer 333 may have a refractive index different from that of the first matrix resin 331, and may form an optical interface with the first matrix resin 331. For example, the first scatterer 333 may be light scattering particles. The first scatterer 333 is not particularly limited as long as the first scatterer 333 is a material capable of scattering at least a portion of the transmitted light, but may be, for example, metal oxide particles or organic particles. Examples of metal oxides may include titanium oxide (TiO 2 )、ZrO 2 ), aluminum oxide (Al 2 O 3 ), indium oxide (In 2 O 3 ), zinc oxide (ZnO) or tin oxide (SnO 2 ), etc., and examples of the material of the organic particles may include acrylic resin or polyurethane resin, etc. The first scatterer 333 may scatter light in random directions regardless of the incident direction of the incident light without substantially converting the wavelength of light transmitted through the light-transmitting pattern 330.

[0158] As described above, the light-transmitting pattern 330 may directly contact the first capping layer 391 in the first light-transmitting area TA1.

[0159] The first wavelength conversion pattern 340 and the second wavelength conversion pattern 350 may be positioned on the first capping layer 391 .

[0160] The first wavelength conversion pattern 340 may be positioned on the first cover layer 391 and may overlap the second light-transmitting area TA2 and the fifth light-transmitting area TA5. Fig.10 As shown in , the first wavelength conversion pattern 340 may be formed in a stripe shape extending in the second direction D2, and may intersect with the seventh light blocking area BA7 between the first row RT1 and the second row RT2. However, the present disclosure is not limited thereto, and according to another embodiment, the first wavelength conversion pattern 340 may also be formed in a structure in which a portion overlapping with the second light transmission area TA2 and a portion overlapping with the fifth light transmission area TA5 are spaced apart from each other (e.g., in the form of an island pattern).

[0161] The first wavelength conversion pattern 340 may convert or shift the peak wavelength of the incident light into light having another specific peak wavelength, and emit light having another specific peak wavelength. According to an embodiment, the first wavelength conversion pattern 340 may convert the source light L1 provided from the second light emitting element ED2 into red light having a peak wavelength in the range of about 610 nm to about 650 nm, and emit red light. That is, the second light Lb emitted from the second light-transmitting area TA2 may be red light.

[0162] The first wavelength conversion pattern 340 may include a second base resin 341 and first wavelength shifters 345 dispersed in the second base resin 341 , and may further include second scatterers 343 dispersed in the second base resin 341 .

[0163] The second base resin 341 may be made of a material having high light transmittance. According to an embodiment, the second base resin 341 may be made of an organic material. 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 the constituent material of the first base resin 331.

[0164] The first wavelength shifter 345 may convert or shift the peak wavelength of the incident light to another specific peak wavelength. According to an embodiment, the first wavelength shifter 345 may convert the light of the first color, which is the blue light provided from the second light emitting element ED2, into red light having a single peak wavelength in the range of about 610 nm to about 650 nm, and emit the red light.

[0165] The first wavelength shifter 345 may be, for example, a quantum dot, a quantum rod, or a phosphor. For example, a quantum dot may be a particle substance that emits a specific color when electrons transition from a conduction band to a valence band.

[0166] Quantum dots can be semiconductor nanocrystal materials. Quantum dots can have a specific band gap to absorb light according to their composition and size, and then emit light with a unique wavelength. Examples of semiconductor nanocrystals of quantum dots can include group IV nanocrystals, group II-VI compound nanocrystals, group III-V compound nanocrystals, group IV-VI compound nanocrystals, or combinations thereof.

[0167] The II-VI compound can be selected from the group consisting of the following compounds: a binary compound selected from the group consisting of CdSe, CdTe, ZnS, ZnSe, ZnTe, ZnO, HgS, HgSe, HgTe, MgSe, MgS and mixtures thereof; a ternary compound selected from the group consisting of InZnP, AgInS, CuInS, CdSeS, CdSeTe, CdSTe, ZnSeS, ZnSeTe, ZnSTe, HgSeS, HgSeTe, HgSTe, CdZn S, CdZnSe, CdZnTe, CdHgS, CdHgSe, CdHgTe, HgZnS, HgZnSe, HgZnTe, MgZnSe, MgZnS and mixtures thereof; and a quaternary compound selected from the group consisting of HgZnTeS, CdZnSeS, CdZnSeTe, CdZnSTe, CdHgSeS, CdHgSeTe, CdHgSTe, HgZnSeS, HgZnSeTe, HgZnSTe and mixtures thereof.

[0168] The III-V compound can be selected from the group consisting of the following compounds: a binary compound selected from the group consisting of GaN, GaP, GaAs, GaSb, AlN, AlP, AlAs, AlSb, InN, InP, InAs, InSb and a mixture thereof; a ternary compound selected from the group consisting of GaNP, GaNAs, GaNSb, GaPAs, GaPSb, AlNP, AlNAs, AlNSb, AlPAs, AlPSb, InGaP, InNP, InAlP, InNAs, InNSb, InPAs, InPSb and a mixture thereof; and a quaternary compound selected from the group consisting of GaAlNP, GaAlNAs, GaAlNSb, GaAlPAs, GaAlPSb, GaInNP, GaInNAs, GaInNSb, GaInPAs, GaInPSb, InAlNP, InAlNAs, InAlNSb, InAlPAs, InAlPSb and a mixture thereof.

[0169] The IV-VI compound may be selected from the group consisting of the following compounds: a binary compound selected from the group consisting of SnS, SnSe, SnTe, PbS, PbSe, PbTe and mixtures thereof; a ternary compound selected from the group consisting of SnSeS, SnSeTe, SnSTe, PbSeS, PbSeTe, PbSTe, SnPbS, SnPbSe, SnPbTe and mixtures thereof; and a quaternary compound selected from the group consisting of SnPbSSe, SnPbSeTe, SnPbSTe and mixtures thereof. The IV group element may be selected from the group consisting of Si, Ge and mixtures thereof. The IV group compound may be a binary compound selected from the group consisting of SiC, SiGe and mixtures thereof.

[0170] In this case, the binary compound, ternary compound or quaternary compound may be present in the particle at a uniform concentration, or may be present in the same particle in a state of partially different concentration distribution. In addition, the quantum dot may have a core-shell structure in which one quantum dot surrounds another quantum dot. The interface between the core and the shell may have a concentration gradient in which the concentration of the element present in the shell decreases toward the center.

[0171] According to an embodiment, the quantum dot may have a core-shell structure including a core containing the nanocrystal described above and a shell surrounding the core. The shell of the quantum dot may be used as a protective layer for maintaining semiconductor properties by preventing chemical modification of the core and / or a charging layer for imparting electrophoretic properties to the quantum dot. The shell may be a single layer or multiple layers. Examples of the shell of the quantum dot may include metal or non-metal oxides, semiconductor compounds, or combinations thereof.

[0172] For example, examples of metal or non-metal oxides may include: binary compounds such as SiO 2 、Al 2 O 3 、TiO 2 、ZnO、MnO、Mn 2 O 3 , Mn 3 O 4 , CuO, FeO, Fe 2 O 3 , Fe 3 O 4 , CoO, Co 3 O 4 or NiO; or ternary compounds such as MgAl 2 O 4 、CoFe 2 O 4 、NiFe 2 O 4 or CoMn 2 O4 , but the present disclosure is not limited thereto.

[0173] In addition, examples of semiconductor compounds may include CdS, CdSe, CdTe, ZnS, ZnSe, ZnTe, ZnSeS, ZnTeS, GaAs, GaP, GaSb, HgS, HgSe, HgTe, InAs, InP, InGaP, InSb, AlAs, AlP, and AlSb, etc., but the present disclosure is not limited thereto.

[0174] The light emitted by the first wavelength shifter 345 may have an emission wavelength spectrum full width at half maximum (FWHM) of about 45 nm or less, or about 40 nm or less, or about 30 nm or less, and thereby, the color purity and color reproducibility of the color displayed by the display device 1 may be further improved. In addition, the light emitted by the first wavelength shifter 345 may be emitted in several directions regardless of the incident direction of the incident light. Thus, the side visibility of the second color displayed in the second light transmission area TA2 may be improved.

[0175] A portion of the source light provided from the second light emitting element ED2 may not be converted into red light by the first wavelength shifter 345. However, light among the source light that is not converted into red light may be blocked by the second color filter 233. On the other hand, red light among the source light converted by the first wavelength conversion pattern 340 is transmitted through the second color filter 233 and emitted to the outside. That is, the second light emitted from the second light-transmitting area TA2 may be red light.

[0176] The second scatterer 343 may have a refractive index different from that of the second matrix resin 341, and may form an optical interface with the second matrix resin 341. For example, the second scatterer 343 may be light scattering particles. Other detailed descriptions of the second scatterer 343 are substantially the same or similar to those of the first scatterer 333, and thus will be omitted.

[0177] The second wavelength conversion pattern 350 may be positioned on the first cover layer 391 and may overlap the third light-transmitting area TA3 and the sixth light-transmitting area TA6. Fig.10 As shown in , the second wavelength conversion pattern 350 may be formed in a stripe shape extending in the second direction D2, and may intersect with the seventh light blocking area BA7 between the first row RT1 and the second row RT2. However, the present disclosure is not limited thereto, and according to another embodiment, the second wavelength conversion pattern 350 may also be formed in a structure in which a portion overlapping with the third light transmitting area TA3 and a portion overlapping with the sixth light transmitting area TA6 are spaced apart from each other (e.g., in the form of an island pattern).

[0178] The second wavelength conversion pattern 350 may convert or shift the peak wavelength of the incident light into light having another specific peak wavelength, and emit light having another specific peak wavelength. According to an embodiment, the second wavelength conversion pattern 350 may convert the source light L1 provided from the third light emitting element ED3 into green light in the range of about 510 nm to about 550 nm, and emit green light. That is, the third light Lc emitted from the third light-transmitting area TA3 may be green light.

[0179] The second wavelength conversion pattern 350 may include a third base resin 351 and second wavelength shifters 355 dispersed in the third base resin 351 , and may further include third scatterers 353 dispersed in the third base resin 351 .

[0180] The third matrix resin 351 may be made of a material having high light transmittance. According to an embodiment, the third matrix resin 351 may be made of an organic material. The third matrix resin 351 may be made of the same material as the first matrix resin 331, or may include at least one of the materials exemplified as the constituent material of the first matrix resin 331.

[0181] The second wavelength shifter 355 may convert or shift the peak wavelength of the incident light to another specific peak wavelength. According to an embodiment, the second wavelength shifter 355 may convert blue light having a peak wavelength in the range of about 440 nm to about 480 nm into green light having a peak wavelength in the range of about 510 nm to about 550 nm.

[0182] The second wavelength shifter 355 may be, for example, a quantum dot, a quantum rod, or a phosphor. A more detailed description of the second wavelength shifter 355 is substantially the same as or similar to that of the first wavelength shifter 345 described above, and thus will be omitted.

[0183] According to an embodiment, both the first wavelength shifter 345 and the second wavelength shifter 355 may be formed of quantum dots. In this case, the particle size of the quantum dots constituting the first wavelength shifter 345 may be greater than the particle size of the quantum dots constituting the second wavelength shifter 355.

[0184] The third scatterer 353 may have a refractive index different from that of the third matrix resin 351, and may form an optical interface with the third matrix resin 351. For example, the third scatterer 353 may be light scattering particles. Other detailed descriptions of the third scatterer 353 are substantially the same or similar to those of the second scatterer 343, and thus will be omitted.

[0185] Source light emitted from the third light emitting element ED3 may be provided to the second wavelength conversion pattern 350 , and the second wavelength shifter 355 may convert the source light provided from the third light emitting element ED3 into green light having a peak wavelength in the range of about 510 nm to about 550 nm and emit the green light.

[0186] A portion of the source light, which is blue light, may be transmitted through the second wavelength conversion pattern 350 without being converted into green light by the second wavelength shifter 355. However, the light that is not converted into green light may be blocked by the third color filter 235. On the other hand, the green light converted by the second wavelength conversion pattern 350 among the source light is transmitted through the third color filter 235 and emitted to the outside. Therefore, the third light emitted from the third light-transmitting area TA3 to the outside of the display device 1 may be green light.

[0187] When the source light is a mixture of dark blue light and light blue light, the source light includes both the long wavelength component and the short wavelength component, and thus the moving path of the source light incident on the second wavelength conversion pattern 350 can be further increased. Therefore, the amount of source light provided to the second wavelength shifter 355 can be further increased, and the light conversion efficiency of the second wavelength conversion pattern 350 can be increased. Therefore, the color reproducibility of the display device 1 can be further improved.

[0188] like Figure 6 As shown in , the second cover layer 392 may be positioned on the light transmissive pattern 330, the first wavelength conversion pattern 340, and the second wavelength conversion pattern 350. The second cover layer 392 may cover the light transmissive pattern 330, the first wavelength conversion pattern 340, and the second wavelength conversion pattern 350. The second cover layer 392 may contact the first cover layer 391 in the light blocking areas BA1, BA2, and BA3, and may seal the light transmissive pattern 330, the first wavelength conversion pattern 340, and the second wavelength conversion pattern 350. Therefore, impurities such as moisture or air may be prevented from penetrating from the outside to damage or contaminate the light transmissive pattern 330, the first wavelength conversion pattern 340, and the second wavelength conversion pattern 350.

[0189] The second capping layer 392 may be made of an inorganic material, such as silicon nitride, aluminum nitride, zirconium nitride, titanium nitride, hafnium nitride, tantalum nitride, silicon oxide, aluminum oxide, titanium oxide, tin oxide, and silicon oxynitride.

[0190] When both the first cover layer 391 and the second cover layer 392 are made of an inorganic material, portions of the first cover layer 391 and the second cover layer 392 that directly contact each other may be inorganic-inorganic bonded, which may effectively block the inflow of moisture or air from the outside.

[0191] like Figure 6As shown in , the color mixing prevention member 370 may be positioned on the second cover layer 392. The color mixing prevention member 370 may be positioned in the light blocking area BA to block the transmission of light. More specifically, the color mixing prevention member 370 may be positioned between the light transmission pattern 330 and the first wavelength conversion pattern 340 and between the first wavelength conversion pattern 340 and the second wavelength conversion pattern 350 to prevent color mixing between adjacent light transmission areas. According to an embodiment, the color mixing prevention member 370 may be formed to extend in the second direction D2 (reference Fig.10 ) and can prevent the stripe shape extending in the first direction D1 (reference Fig.10 ) between adjacent light-transmitting areas on the surface.

[0192] The color mixture preventing member 370 may include an organic light blocking material and may be formed by a process of coating and exposing the organic light blocking material. For example, the color mixture preventing member 370 may include a dye or pigment having a light blocking property and may be a black matrix.

[0193] As described above, filler 70 may be positioned in the space between color conversion substrate 30 and display substrate 10. Figure 6 As shown in FIG. 1 , the filler 70 may be positioned between the second cover layer 392 and the thin film encapsulation layer 170 and between the color mixture preventing member 370 and the thin film encapsulation layer 170. The filler 70 may be in direct contact with the second cover layer 392 and the color mixture preventing member 370.

[0194] Meanwhile, in the display device 1 described above, when external light is incident on the color conversion substrate 30, a portion of the external light may be reflected at the interface between the second substrate 310 and the color filter having different refractive indexes. Specifically, the external light may be reflected at the interface between the second substrate 310 and the first color filter 231, the interface between the second substrate 310 and the second color filter 233, the interface between the second substrate 310 and the third color filter 235, and the interface between the second substrate 310 and the color pattern 250. As the difference in refractive index between the two media (e.g., the second substrate 310 and the first color filter 231) increases, the reflectivity of the external light may increase. The reflected light deteriorates the quality of the displayed image.

[0195] Hereinafter, a color conversion substrate 30 capable of reducing reflectance of external light and a display device 1 including the color conversion substrate 30 will be described.

[0196] Fig.11 is schematically shown along Figure 3 and Figure 4 FIG. 5 is a cross-sectional view of a display device according to another embodiment taken along line BB′.

[0197] refer to Fig.11 , the color conversion substrate 30 may include a first stack 321 positioned on one surface of the second substrate 310 facing the display substrate 10. The first color filter 231, the first color pattern 251, the second color pattern 252, and the third color pattern 253 may be positioned on one surface of the first stack 321 ( Fig.11 Because the color conversion substrate 30 according to the embodiment is different from the above-described Figure 6 The color conversion substrate 30 is different only in that it has a first color filter 231, a first color pattern 251, a second color pattern 252, and a third color pattern 253 disposed on one surface of a first stack 321, and further includes a second stack 322, so redundant description will be omitted.

[0198] The first stack 321 may be positioned between the second substrate 310 and the first color filter 231, between the second substrate 310 and the first color pattern 251, between the second substrate 310 and the second color pattern 252, and between the second substrate 310 and the third color pattern 253. The first stack 321 may be aligned with one surface ( Fig.11 in contact with the upper surface).

[0199] According to an embodiment, the first stack 321 may be positioned on the entire surface of the second substrate 310. Here, the entire surface of the second substrate 310 may be a surface including a light transmitting region and a light blocking region.

[0200] like Fig.11 As shown in , the first stack 321 may be positioned between the second substrate 310 and the first color filter 231 to reduce the reflectivity of external light reflected from the interface between the second substrate 310 and the first color filter 231. According to an embodiment, the refractive index of the first stack 321 may have a value between the refractive index of the second substrate 310 and the refractive index of the first color filter 231.

[0201] The reflectivity R of light varies with the refractive index n of the first medium through which the light is transmitted. 0 The refractive index n of the second medium 1 This can be expressed by the following formula.

[0202]

[0203] As an example, when the refractive index of the second substrate 310 is 1.5 and the refractive index of the first color filter 231 is 1.8, the reflectivity R of the external light at the interface between the second substrate 310 and the first color filter 231 is about 0.0082. According to an embodiment, when the first stack 321 having a refractive index of 1.7 is provided between the second substrate 310 and the first color filter 231, the reflectivity R of the external light is about 0.0039 at the interface between the second substrate 310 and the first stack 321, and about 0.0008 at the interface between the first stack 321 and the first color filter 231. Therefore, when the first stack 321 is provided, the reflectivity R of the external light can be significantly reduced compared to the case where the first stack 321 is not provided.

[0204] Therefore, according to an embodiment, reflectivity of external light incident on the color conversion substrate 30 and reflected at an interface between the second substrate 310 and the first color filter 231 may be reduced by disposing the first stack 321 between the second substrate 310 and the first color filter 231 .

[0205] Similarly, the first stack 321 may be positioned between the second substrate 310 and the first color pattern 251 , between the second substrate 310 and the second color pattern 252 , and between the second substrate 310 and the third color pattern 253 .

[0206] As described above, the first color filter 231 may be formed of the same material as the first color pattern 251, the second color pattern 252, and the third color pattern 253. According to an embodiment, the refractive index of the first stack 321 may have a value between the refractive index of the second substrate 310 and the refractive index of the first color pattern 251, may have a value between the refractive index of the second substrate 310 and the refractive index of the second color pattern 252, and may have a value between the refractive index of the second substrate 310 and the refractive index of the third color pattern 253.

[0207] Therefore, when external light corresponding to the first color pattern 251, the second color pattern 252 and the third color pattern 253 is incident on the second substrate 310, because the first stack 321 is positioned between the second substrate 310 and the first color pattern 251, between the second substrate 310 and the second color pattern 252, and between the second substrate 310 and the third color pattern 253, the reflectivity of the external light can be reduced.

[0208] like Fig.11 As shown in FIG. 1 , the light blocking members 221, 222, and 223 may be positioned on one surface of each of the first color pattern 251, the second color pattern 252, and the third color pattern 253. Fig.11The first light blocking member 221 may be positioned on the first color pattern 251, the second light blocking member 222 may be positioned on the second color pattern 252, and the third light blocking member 223 may be positioned on the third color pattern 253.

[0209] like Fig.11 As shown in FIG. 1 , the second stack 322 may be positioned on the first color filter 231, the first stack 321, the first color pattern 251, the second color pattern 252, the third color pattern 253, the first light blocking member 221, the second light blocking member 222, and the third light blocking member 223. The second stack 322 may overlap with one surface ( Fig.11 The second stack 322 may be in direct contact with one surface ( Fig.11 The second stack 322 may be in direct contact with the first stack 321 overlapping the second light-transmitting area TA2 and the third light-transmitting area TA3, respectively.

[0210] According to an embodiment, the second color filter 233 may be positioned in the second light transmission area TA2, and the third color filter 235 may be positioned in the third light transmission area TA3. The second stack 322 may be positioned between the first stack 321 and the second color filter 233, and may be aligned with one surface ( Fig.11 The second stack 322 may be positioned between the first stack 321 and the third color filter 235, and may be in direct contact with one surface ( Fig.11 in direct contact with the upper surface of the substrate.

[0211] The second stack 322 may be positioned between the first stack 321 and the second color filter 233 to reduce reflectivity of external light at an interface between the first stack 321 and the second color filter 233. The refractive index of the second stack 322 may have a value between the refractive index of the first stack 321 and the refractive index of the second color filter 233. Similar to the first stack 321 described above, since the refractive index of the second stack 322 has a value between the refractive index of the first stack 321 and the refractive index of the second color filter 233, reflectivity of external light incident on the color conversion substrate 30 and reflected may be reduced.

[0212] Similarly, the second stack 322 may be positioned between the first stack 321 and the third color filter 235 to reduce the reflectivity of external light at the interface between the first stack 321 and the third color filter 235. The refractive index of the second stack 322 may have a value between the refractive index of the first stack 321 and the refractive index of the third color filter 235. Therefore, since the refractive index of the second stack 322 has a value between the refractive index of the first stack 321 and the refractive index of the third color filter 235, the reflectivity of external light incident on the color conversion substrate 30 and reflected may be reduced.

[0213] like Fig.11 As shown in FIG. 1 , the first color filter 231, the first color pattern 251, the second color pattern 252, the third color pattern 253, the first light blocking member 221, the second light blocking member 222, and the third light blocking member 223 may be positioned between the first stack 321 and the second stack 322. Since the first color filter 231, the first color pattern 251, the second color pattern 252, the third color pattern 253, the first light blocking member 221, the second light blocking member 222, and the third light blocking member 223 are positioned between the first stack 321 and the second stack 322, impurities such as moisture or air may be prevented from penetrating from the outside.

[0214] Each of the first stack 321 and the second stack 322 may be formed of an inorganic material. The first stack 321 and the second stack 322 may include different inorganic materials. According to an embodiment, the refractive index of the first stack 321 may be smaller than the refractive index of the second stack 322. For example, external light may be incident on the color conversion substrate 30 in the second light transmission area TA2 in the order of the second substrate 310, the first stack 321, the second stack 322, and the second color filter 233. The refractive index of the second substrate 310 may be the smallest, and the refractive index of the second color filter 233 may be the largest. In this case, the refractive index of the first stack 321 may have a value between the refractive index of the second substrate 310 and the refractive index of the second stack 322, and the refractive index of the second stack 322 may have a value between the refractive index of the first stack 321 and the refractive index of the second color filter 233. According to an embodiment, the refractive index of each component layer may increase in the same order as the order in which external light is incident, that is, in the order of the second substrate 310 having the smallest refractive index, the first stack 321, the second stack 322, and the second color filter 233.

[0215] According to an embodiment, each of the first stack 321 and the second stack 322 may be any one of silicon oxide, silicon oxynitride, silicon nitride, indium tin oxide (ITO), and indium zinc oxide (IZO). However, each of the first stack 321 and the second stack 322 is not limited thereto, and any transparent inorganic material such as titanium oxide, tantalum oxide, hafnium oxide, or zirconium oxide may be applied.

[0216] like Fig.11 As shown in FIG. 1 , the first cover layer 391 may be positioned on the second stack 322, the second color filter 233, and the third color filter 235. The first cover layer 391 may be in contact with one surface ( Fig.11 The lower surface in the figure is in direct contact with the Figure 6 The first cover layer 391 is described, so a redundant description thereof will be omitted.

[0217] The light-transmitting pattern 330, the first wavelength conversion pattern 340, and the second wavelength conversion pattern 350 may be positioned on the first cover layer 391. The second cover layer 392 may be positioned on the light-transmitting pattern 330, the first wavelength conversion pattern 340, and the second wavelength conversion pattern 350. The second cover layer 392 may cover and seal the light-transmitting pattern 330, the first wavelength conversion pattern 340, and the second wavelength conversion pattern 350.

[0218] The color mixture preventing member 370 may be positioned on the second cover layer 392. The color mixture preventing member 370 may be positioned in the light blocking areas BA1, BA2, and BA3 to block the transmission of light.

[0219] As described above, in the color conversion substrate according to the embodiment, by forming the first stack 321 between the second substrate 310 and the first color filter 231 and between the second substrate 310 and the color patterns 251, 252, and 253, the reflectivity of external light can be reduced between the second substrate 310 and the first color filter 231, and the reflectivity of external light can be reduced between the second substrate 310 and the color patterns 251, 252, and 253. In addition, by forming the first stack 321 and the second stack 322 between the second substrate 310 and the second color filter 233 and between the second substrate 310 and the third color filter 235, the reflectivity of external light can be reduced between the second substrate 310 and the second color filter 233 and between the second substrate 310 and the third color filter 235.

[0220] Fig.12 is schematically shown along Figure 3 and Figure 4 FIG. 5 is a cross-sectional view of a display device according to yet another embodiment, taken along line BB′.

[0221] refer to Fig.12 The color conversion substrate 30 according to the present embodiment may include a second substrate 310, a first stack 321, color filters 231, 233 and 235, a light blocking member 220, a second stack 322, a light transmissive pattern 330, a first wavelength conversion pattern 340 and a second wavelength conversion pattern 350. Specifically, the present embodiment is different from the above-described Fig.11 The embodiment of the present invention is different in that the position of the light blocking member 220 is different, and other configurations are substantially the same or similar. Therefore, redundant descriptions will be omitted, and the differences will be mainly described.

[0222] like Fig.12 As shown in , the light blocking member 220 may be positioned on one surface of the second stack 322 facing the display substrate 10 .

[0223] According to an embodiment, the light blocking member 220 may include a first light blocking member 221 overlapping the first light blocking area BA1 , a second light blocking member 222 overlapping the second light blocking area BA2 , and a third light blocking member 223 overlapping the third light blocking area BA3 .

[0224] The light blocking member 220 may be positioned on the second stack 322. Specifically, the first light blocking member 221 may overlap the first light blocking area BA1 and may be positioned on the second stack 322. The first light blocking member 221 may overlap one surface ( Fig.12 The second light blocking member 222 may overlap the second light blocking area BA2 and may be positioned on the second stack 322. The second light blocking member 222 may be in direct contact with one surface ( Fig.12 The third light blocking member 223 may overlap the third light blocking area BA3 and may be positioned on the second stack 322. The third light blocking member 223 may be in direct contact with one surface ( Fig.12 in direct contact with the lower surface of the substrate.

[0225] According to the present embodiment, the light blocking member 220 may be positioned between the second stack 322 and the first cover layer 391 .

[0226] According to an embodiment, the first light blocking member 221 may overlap the first cover layer 391, and at least one region of the first light blocking member 221 may overlap the second color filter 233. One surface ( Fig.12 A region of the lower surface of the first light blocking member 221 may be in direct contact with the first cover layer 391, and a surface of the first light blocking member 221 ( Fig.12The second light blocking member 222 may overlap the first cover layer 391, at least one region of the second light blocking member 222 may overlap the second color filter 233, and another region of the second light blocking member 222 may overlap the third color filter 235. Fig.12 A region of the lower surface of the second light blocking member 222 may be in direct contact with the first cover layer 391, and a surface of the second light blocking member 222 ( Fig.12 The other areas of the lower surface of the third light blocking member 223 may be in direct contact with the second color filter 233 and the third color filter 235, respectively. The third light blocking member 223 may overlap with the first cover layer 391, and one area of ​​the third light blocking member 223 may overlap with the third color filter 235. One surface ( Fig.12 A region of the lower surface of the third light blocking member 223 may be in direct contact with the first cover layer 391, and a surface of the third light blocking member 223 ( Fig.12 Another area of ​​the lower surface in the middle may be in direct contact with the third color filter 235.

[0227] The light blocking member 220 may be aligned with the light blocking area BA (refer to Figure 4 ) overlap to block the transmission of light. According to the present embodiment, the light blocking member 220 can be disposed on the second substrate 310 to be closer to the display substrate 10 from which light is emitted, thereby preventing color mixing due to penetration of light between adjacent light transmission areas, and therefore, the color reproduction rate can be further improved.

[0228] Fig.13 is schematically shown along Figure 3 and Figure 4 A cross-sectional view of a display device according to yet another embodiment taken along line BB', Fig.14 It is schematically shown Fig.13 A plan view of a first stack of color conversion substrates shown in FIG. Fig.15 is schematically shown along Figure 3 and Figure 4 FIG. 5 is a cross-sectional view of a display device according to yet another embodiment, taken along line BB′.

[0229] refer to Fig.13 The color conversion substrate 30 according to the present embodiment may include a second substrate 310, a first stack 321, color filters 231, 233 and 235, a light blocking member 220, a second stack 322, a light transmissive pattern 330, a first wavelength conversion pattern 340 and a second wavelength conversion pattern 350. Specifically, the present embodiment is different from the above-described Fig.11The embodiment of the present invention is different in that the position of the first stacking member 321 is different, and the other configurations are substantially the same or similar. Therefore, redundant descriptions will be omitted, and the differences will be mainly described.

[0230] refer to Fig.13 and Fig.14 , the first stack 321 may be positioned on one surface of the second substrate 310 facing the display substrate 10. The first color filter 231, the first color pattern 251, the second color pattern 252, and the third color pattern 253 may be positioned on one surface of the first stack 321 ( Fig.13 The first stack 321 may be positioned between the second substrate 310 and the first color pattern 251, between the second substrate 310 and the second color pattern 252, and between the second substrate 310 and the third color pattern 253. The first stack 321 may be aligned with one surface ( Fig.13 in contact with the upper surface).

[0231] According to this embodiment, Fig.14 As shown in the figure, the first stack 321 can be positioned in the remaining areas (i.e., the first light transmitting area TA1, the first light blocking area BA1, the second light blocking area BA2, the third light blocking area BA3, the fourth light blocking area BA4, the fifth light blocking area BA5, the sixth light blocking area BA6 and the seventh light blocking area BA7) except the second light transmitting area TA2 and the third light transmitting area TA3.

[0232] like Fig.13 As shown in , the first stack 321 may be positioned between the second substrate 310 and the first color filter 231 to reduce the reflectivity of external light reflected from the interface between the second substrate 310 and the first color filter 231. According to an embodiment, the refractive index of the first stack 321 may have a value between the refractive index of the second substrate 310 and the refractive index of the first color filter 231.

[0233] The first stack 321 may be positioned between the second substrate 310 and the first color pattern 251, between the second substrate 310 and the second color pattern 252, and between the second substrate 310 and the third color pattern 253. The refractive index of the first stack 321 may have a value between the refractive index of the second substrate 310 and the refractive index of the first color pattern 251, may have a value between the refractive index of the second substrate 310 and the refractive index of the second color pattern 252, and may have a value between the refractive index of the second substrate 310 and the refractive index of the third color pattern 253. Therefore, when external light is incident on the second substrate 310 corresponding to the first color pattern 251, the second color pattern 252, and the third color pattern 253, since the first stack 321 is positioned between the second substrate 310 and the first color pattern 251, between the second substrate 310 and the second color pattern 252, and between the second substrate 310 and the third color pattern 253, the reflectivity of the external light may be reduced.

[0234] According to an embodiment, the second stack 322 may overlap with one surface ( Fig.13 The second stack 322 may be in direct contact with one surface ( Fig.13 Specifically, the second stack 322 may be in direct contact with a surface ( Fig.13 The second stack 322 may be in direct contact with one surface ( Fig.13 and may be in contact with one surface ( Fig.13 in contact with the upper surface).

[0235] According to the present embodiment, the first stack 321 having a refractive index between the first color filter 231 and the second substrate 310 may be positioned between the first color filter 231 and the second substrate 310. The second stack 322 having a refractive index between the second color filter 233 and the second substrate 310 and having a refractive index between the third color filter 235 and the second substrate 310 may be positioned between the second color filter 233 and the second substrate 310 and between the third color filter 235 and the second substrate 310.

[0236] That is, the reflectivity of external light at the interface between the first color filter 231 and the second substrate 310, at the interface between the first color pattern 251 and the second substrate 310, at the interface between the second color pattern 252 and the second substrate 310, and at the interface between the third color pattern 253 and the second substrate 310 can be reduced by selectively forming the first stack 321 in the area where the first color filter 231, the first color pattern 251, the second color pattern 252, and the third color pattern 253 are located. In addition, the reflectivity of external light at the interface between the second color filter 233 and the second substrate 310 and at the interface between the third color filter 235 and the second substrate 310 can be reduced by forming the second stack 322 in the area where the second color filter 233 and the third color filter 235 are located.

[0237] At the same time, if Fig.15 As shown in FIG. 1 , the light blocking member 220 may be positioned on the second stack 322. Fig.12 Similar to the position of the light blocking member 220, the first light blocking member 221 may overlap with the first light blocking area BA1 and may be positioned on the second stack 322, the second light blocking member 222 may overlap with the second light blocking area BA2 and may be positioned on the second stack 322, and the third light blocking member 223 may overlap with the third light blocking area BA3 and may be positioned on the second stack 322. The position and configuration of the light blocking member 220 are similar to Fig.12 The descriptions are substantially the same or similar, and thus a detailed description thereof will be omitted.

[0238] like Fig.15 As shown in FIG. 1 , the light blocking member 220 may be positioned between the second stack 322 and the first cover layer 391. The light blocking member 220 may be aligned with the light blocking area BA (refer to FIG. 1 ). Figure 4 ) overlap to block the transmission of light. According to the present embodiment, the light blocking member 220 can be disposed on the second substrate 310 to be closer to the display substrate 10 from which light is emitted, thereby preventing color mixing due to penetration of light between adjacent light transmission areas, and therefore, the color reproduction rate can be further improved.

[0239] Fig.16 is schematically shown along Figure 3 and Figure 4 A cross-sectional view of a display device according to yet another embodiment taken along line BB′, and Fig.17 is schematically shown along Figure 3 and Figure 4 FIG. 5 is a cross-sectional view of a display device according to yet another embodiment, taken along line BB′.

[0240] refer to Fig.16, the color conversion substrate 30 according to the present embodiment may include a second substrate 310, color filters 231, 233 and 235, a light blocking member 220, a second stack 322, a light transmissive pattern 330, a first wavelength conversion pattern 340 and a second wavelength conversion pattern 350. Specifically, the present embodiment is different from the above-described Fig.11 The embodiment of the present invention is different in that the first stacking member 321 is omitted, and other configurations are substantially the same or similar. Therefore, redundant descriptions will be omitted, and the differences will be mainly described.

[0241] refer to Fig.16 , the first color filter 231, the first color pattern 251, the second color pattern 252, and the third color pattern 253 may be positioned on one surface of the second substrate 310 facing the display substrate 10. The first color filter 231, the first color pattern 251, the second color pattern 252, and the third color pattern 253 may be positioned on one surface of the second substrate 310 ( Fig.16 in direct contact with the lower surface of the substrate.

[0242] According to an embodiment, the second stack 322 may be disposed on the first color filter 231, the first light blocking member 221, the second light blocking member 222, the third light blocking member 223, and the second substrate 310. The second stack 322 may overlap one surface ( Fig.16 ) and may be in direct contact with one surface ( Fig.16 in direct contact with the lower surface of the substrate.

[0243] According to an embodiment, the second stack 322 may be aligned with one surface ( 100 ) of the second substrate 310 overlapping the second light-transmitting area TA2 and the third light-transmitting area TA3. Fig.16 The second stack 322 may be in direct contact with one surface ( Fig.16 and may be in contact with one surface ( Fig.16 in contact with the upper surface).

[0244] According to this embodiment, a second stack member 322 having a refractive index between the refractive index of the second color filter 233 and the refractive index of the second substrate 310 and having a refractive index between the refractive index of the third color filter 235 and the refractive index of the second substrate 310 can be positioned between the second color filter 233 and the second substrate 310 and between the third color filter 235 and the second substrate 310.

[0245] That is, the reflectivity of external light at the interface between the second color filter 233 and the second substrate 310 and at the interface between the third color filter 235 and the second substrate 310 may be reduced by forming the second stack 322 in the region where the second color filter 233 and the third color filter 235 are located.

[0246] Although the second stack 322 is described as an example in the present embodiment, the present disclosure is not limited thereto, and the first stack 321 may be positioned at the position of the second stack 322 instead of the second stack 322 .

[0247] At the same time, if Fig.17 As shown in FIG. 1 , the light blocking member 220 may be positioned on the second stack 322. Fig.12 Similar to the position of the light blocking member 220, the first light blocking member 221 may overlap with the first light blocking area BA1 and may be positioned on the second stack 322, the second light blocking member 222 may overlap with the second light blocking area BA2 and may be positioned on the second stack 322, and the third light blocking member 223 may overlap with the third light blocking area BA3 and may be positioned on the second stack 322. The position and configuration of the light blocking member 220 are similar to Fig.12 The descriptions are substantially the same or similar, and thus a detailed description thereof will be omitted.

[0248] like Fig.17 As shown in FIG. 1 , the light blocking member 220 may be positioned between the second stack 322 and the first cover layer 391. The light blocking member 220 may be aligned with the light blocking area BA (refer to FIG. 1 ). Figure 4 ) overlap to block the transmission of light. According to the present embodiment, the light blocking member 220 can be disposed on the second substrate 310 to be closer to the display substrate 10 from which light is emitted, thereby preventing color mixing due to penetration of light between adjacent light transmission areas, and therefore, the color reproduction rate can be further improved.

[0249] Fig.18 is schematically shown along Figure 3 and Figure 4 FIG. 5 is a cross-sectional view of a display device according to yet another embodiment, taken along line BB′.

[0250] refer to Fig.18 The color conversion substrate 30 according to the present embodiment may include a second substrate 310, a first stack 321, color filters 231, 233 and 235, a light blocking member 220, a second stack 322, a light transmissive pattern 330, a first wavelength conversion pattern 340 and a second wavelength conversion pattern 350. Specifically, the present embodiment is different from the above-described Fig.11The embodiment of the present invention is different in that the position of the second stack 322 is different, and the other configurations are substantially the same or similar. Therefore, redundant descriptions will be omitted, and the differences will be mainly described.

[0251] like Fig.18 As shown in , the second stack 322 may be positioned on the first color filter 231 , the third color filter 235 , the first stack 321 , the first light blocking member 221 , the second light blocking member 222 , and the third light blocking member 223 .

[0252] The second stack 322 may overlap with one surface ( Fig.18 The second stack 322 may be in direct contact with one surface ( Fig.18 in direct contact with the lower surface of the substrate.

[0253] The second stack 322 may overlap with one surface ( Fig.18 According to an embodiment, the second color filter 233 may be positioned in the second light transmission area TA2. The second stack 322 may be in direct contact with one surface ( Fig.18 The upper surface of the first color filter 231 is in direct contact with the first stack 321 and the second color filter 233.

[0254] The second stack 322 may be positioned between the first stack 321 and the second color filter 233 to reduce reflectivity of external light at an interface between the first stack 321 and the second color filter 233. The refractive index of the second stack 322 may have a value between the refractive index of the first stack 321 and the refractive index of the second color filter 233. Similar to the first stack 321 described above, since the refractive index of the second stack 322 has a value between the refractive index of the first stack 321 and the refractive index of the second color filter 233, reflectivity of external light incident on the color conversion substrate 30 and reflected may be reduced.

[0255] The second stack 322 may be positioned to overlap the third light transmission area TA3. The third color filter 235 may be positioned in the third light transmission area TA3. The third color filter 235 may overlap one surface ( Fig.18 A portion of the third color filter 235 may be in contact with one surface ( Fig.18The third color filter 235 may be in contact with one surface (the lower surface in the middle) of the third light blocking member 223, and another portion of the third color filter 235 may be in contact with one surface ( Fig.18 in contact with the lower surface).

[0256] The second stack 322 may cover the third color filter 235 and may be aligned with one surface ( Fig.18 The second stack 322 may be in contact with a surface ( Fig.18 and may be in contact with one surface ( Fig.18 in contact with the lower surface).

[0257] The second stack 322 is positioned between the first stack 321 and the second color filter 233 in the second light transmission area TA2, but may be positioned to contact the lower surface of the third color filter 235 in the third light transmission area TA3. The second stack 322 may serve to protect the third color filter 235 in the third light transmission area TA3.

[0258] In the third light-transmitting area TA3, the first stack 321 may be positioned between the second substrate 310 and the third color filter 235. Since the refractive index of the first stack 321 has a value between the refractive index of the second substrate 310 and the refractive index of the third color filter 235, the reflectivity of external light incident on the color conversion substrate 30 and reflected may be reduced.

[0259] According to the present embodiment, as described above, since the second stack 322 is positioned between the first stack 321 and the second color filter 233 in the second light transmission area TA2 , reflectivity of external light in the second light transmission area TA2 overlapping the second color filter 233 may be reduced.

[0260] Fig.19 is schematically shown along Figure 3 and Figure 4 FIG. 5 is a cross-sectional view of a display device according to yet another embodiment, taken along line BB′.

[0261] refer to Fig.19 The color conversion substrate 30 according to the present embodiment may include a second substrate 310, a first stack 321, color filters 231, 233 and 235, a light blocking member 220, a second stack 322, a light transmissive pattern 330, a first wavelength conversion pattern 340 and a second wavelength conversion pattern 350. Specifically, the present embodiment is different from the above-described Fig.18The embodiment of the present invention is different in that the position of the light blocking member 220 is different, and other configurations are substantially the same or similar. Therefore, redundant descriptions will be omitted, and the differences will be mainly described.

[0262] like Fig.19 As shown in , the light blocking member 220 may be positioned on one surface of the second substrate 310 facing the display substrate 10 .

[0263] According to an embodiment, the light blocking member 220 may include a first light blocking member 221 overlapping the first light blocking area BA1 , a second light blocking member 222 overlapping the second light blocking area BA2 , and a third light blocking member 223 overlapping the third light blocking area BA3 .

[0264] The light blocking member 220 may be positioned on the second stack 322. Specifically, the first light blocking member 221 may overlap the first light blocking area BA1 and may be positioned on the second stack 322. The first light blocking member 221 may overlap one surface ( Fig.19 The second light blocking member 222 may overlap with the second light blocking area BA2 and may be positioned on the second stack 322. The second light blocking member 222 may contact one surface ( Fig.19 The third light blocking member 223 may overlap with the third light blocking area BA3 and may be positioned on the second stack 322. The third light blocking member 223 may contact one surface ( Fig.19 in contact with the lower surface).

[0265] The first color filter 231 may not overlap with the first light blocking member 221 and may be spaced apart from the first light blocking member 221. The second color filter 233 may overlap with one surface ( Fig.19 ), may overlap with the first light blocking member 221 in the first light blocking area BA1, and may be in contact with one surface ( Fig.19 In addition, the second color filter 233 may overlap with the second light blocking member 222 in the second light blocking area BA2, and may contact one surface ( Fig.19 in contact with the lower surface).

[0266] The third color filter 235 may overlap with the second light blocking member 222 in the second light blocking area BA2, and may be spaced apart from the second light blocking member 222 due to the second stack 322 positioned between the third color filter 235 and the second light blocking member 222. Similarly, the third color filter 235 may overlap with the third light blocking member 223 in the third light blocking area BA3, and may be spaced apart from the third light blocking member 223 due to the second stack 322 positioned between the third color filter 235 and the third light blocking member 223.

[0267] The light blocking member 220 may be aligned with the light blocking area BA (refer to Figure 4 ) overlap to block the transmission of light. According to the present embodiment, the light blocking member 220 can be disposed on the second substrate 310 to be closer to the display substrate 10 from which light is emitted, thereby preventing color mixing due to penetration of light between adjacent light transmission areas, and therefore, the color reproduction rate can be further improved.

[0268] Fig. 20 and Fig.21 is schematically shown along Figure 3 and Figure 4 FIG. 5 is a cross-sectional view of a display device according to yet another embodiment, taken along line BB′.

[0269] like Fig. 20 As shown in FIG. 1 , the first stack 321 may be positioned in the remaining areas (i.e., the first light transmission area TA1, the first light blocking area BA1, the second light blocking area BA2, and the third light blocking area BA3) except the second light transmission area TA2 and the third light transmission area TA3. The second stack 322 may be aligned with one surface ( Fig. 20 The third color filter 235 may be in contact with one surface ( Fig. 20 The structure other than the structure of the first stack 321 is the same as described above. Fig.18 The constructions are substantially the same or similar, and thus a detailed description thereof will be omitted.

[0270] According to the present embodiment, reflectivity of external light between the second color filter 233 and the second substrate 310 may be reduced by selectively disposing the second stack 322 between the second color filter 233 and the second substrate 310 in the second light transmitting area TA2.

[0271] In addition, if Fig.21 As shown in FIG. 1 , the light blocking member 220 may be positioned on the second stack 322. Fig.19Similar to the position of the light blocking member 220, the first light blocking member 221 may overlap with the first light blocking area BA1 and may be positioned on the second stack 322, the second light blocking member 222 may overlap with the second light blocking area BA2 and may be positioned on the second stack 322, and the third light blocking member 223 may overlap with the third light blocking area BA3 and may be positioned on the second stack 322. The position and configuration of the light blocking member 220 are similar to Fig.19 The descriptions are substantially the same or similar, and thus a detailed description thereof will be omitted.

[0272] Fig. 22 and Fig.23 is schematically shown along Figure 3 and Figure 4 FIG. 5 is a cross-sectional view of a display device according to yet another embodiment, taken along line BB′.

[0273] refer to Fig. 22 , the color conversion substrate 30 according to the present embodiment may include a second substrate 310, color filters 231, 233 and 235, a light blocking member 220, a second stack 322, a light transmissive pattern 330, a first wavelength conversion pattern 340 and a second wavelength conversion pattern 350. Specifically, the present embodiment is different from the above-described Fig.18 The embodiment of the present invention is different in that the first stacking member 321 is omitted, and other configurations are substantially the same or similar. Therefore, redundant descriptions will be omitted, and the differences will be mainly described.

[0274] refer to Fig. 22 , the first color filter 231, the first color pattern 251, the second color pattern 252, and the third color pattern 253 may be positioned on one surface of the second substrate 310 facing the display substrate 10. The first color filter 231, the third color filter 235, the first color pattern 251, the second color pattern 252, and the third color pattern 253 may be positioned on one surface of the second substrate 310 ( Fig. 22 in direct contact with the lower surface of the substrate.

[0275] According to an embodiment, the second stack 322 may be disposed on the first color filter 231, the third color filter 235, the first light blocking member 221, the second light blocking member 222, the third light blocking member 223, and the second substrate 310. The second stack 322 may be disposed with one surface ( Fig. 22 The lower surface of the third color filter 235 is in direct contact with the lower surface of the third color filter 235 in the third light transmission area TA3. Fig. 22The second stack 322 may be in direct contact with one surface ( Fig. 22 in direct contact with the lower surface of the substrate.

[0276] According to an embodiment, the second stack 322 may be positioned between the second substrate 310 and the second color filter 233 in the second light transmission area TA2. The second stack 322 may overlap one surface ( Fig. 22 The second stack 322 may be in direct contact with one surface ( Fig. 22 in contact with the upper surface).

[0277] According to the present embodiment, the second stack 322 having a refractive index between the refractive index of the second color filter 233 and the refractive index of the second substrate 310 may be positioned between the second color filter 233 and the second substrate 310. That is, by selectively forming the second stack 322 in the region where the second color filter 233 is positioned, the reflectivity of external light at the interface between the second color filter 233 and the second substrate 310 may be reduced. Although the second stack 322 is described as an example in the present embodiment, the present disclosure is not limited thereto, and instead of the second stack 322, the first stack 321 may also be positioned at the position of the second stack 322.

[0278] At the same time, if Fig.23 As shown in FIG. 1 , the light blocking member 220 may be positioned on the second stack 322. Fig.19 Similar to the position of the light blocking member 220, the first light blocking member 221 may overlap with the first light blocking area BA1 and may be positioned on the second stack 322, the second light blocking member 222 may overlap with the second light blocking area BA2 and may be positioned on the second stack 322, and the third light blocking member 223 may overlap with the third light blocking area BA3 and may be positioned on the second stack 322. The position and configuration of the light blocking member 220 are similar to Fig.19 The descriptions are substantially the same or similar, and thus a detailed description thereof will be omitted.

[0279] like Fig.23 As shown in FIG. 1 , the light blocking member 220 may be positioned between the second stack 322 and the first cover layer 391. The light blocking member 220 may be aligned with the light blocking area BA (refer to FIG. 1 ). Figure 4) overlap to block the transmission of light. According to the present embodiment, the light blocking member 220 can be disposed on the second substrate 310 to be closer to the display substrate 10 from which light is emitted, thereby preventing color mixing due to penetration of light between adjacent light transmission areas, and therefore, the color reproduction rate can be further improved.

[0280] Fig.24 is schematically shown along Figure 3 and Figure 4 FIG. 5 is a cross-sectional view of a display device according to yet another embodiment, taken along line BB′.

[0281] refer to Fig.24 The color conversion substrate 30 according to the present embodiment may include a second substrate 310, a first stack 321, color filters 231, 233 and 235, a light blocking member 220, a second stack 322, a light transmissive pattern 330, a first wavelength conversion pattern 340 and a second wavelength conversion pattern 350. Specifically, the present embodiment is different from the above-described Fig.18 The embodiment of the present invention is different in that the position of the second stack 322 is different, and the other configurations are substantially the same or similar. Therefore, redundant descriptions will be omitted, and the differences will be mainly described.

[0282] like Fig.24 As shown in , the second stack 322 may be positioned on the first color filter 231 , the second color filter 233 , the first stack 321 , the first light blocking member 221 , the second light blocking member 222 , and the third light blocking member 223 .

[0283] The second stack 322 may overlap with one surface ( Fig.24 ) and one surface ( Fig.24 in direct contact with the lower surface of the substrate.

[0284] The second stack 322 may overlap one surface ( Fig.24 According to an embodiment, the third color filter 235 may be positioned in the third light transmission area TA3. The second stack 322 may be in direct contact with one surface ( Fig.24 The upper surface of the first stack 321 is in direct contact with the third color filter 235 and can be positioned between the first stack 321 and the third color filter 235.

[0285] The second stack 322 may be positioned between the first stack 321 and the third color filter 235 to reduce reflectivity of external light at an interface between the first stack 321 and the third color filter 235. The refractive index of the second stack 322 may have a value between the refractive index of the first stack 321 and the refractive index of the third color filter 235. Similar to the first stack 321 described above, since the refractive index of the second stack 322 has a value between the refractive index of the first stack 321 and the refractive index of the third color filter 235, the reflectivity of external light incident on the color conversion substrate 30 and reflected may be reduced.

[0286] The second stack 322 may be positioned to overlap the second light transmission area TA2. The second color filter 233 may be positioned in the second light transmission area TA2. The second color filter 233 may overlap one surface ( Fig.24 A portion of the second color filter 233 may be in contact with one surface ( Fig.24 ), and another portion of the second color filter 233 may be in contact with one surface ( Fig.24 in contact with the lower surface).

[0287] The second stack 322 may cover the second color filter 233 and may be in contact with one surface ( Fig.24 The second stack 322 may be in contact with one surface ( Fig.24 and may be in contact with one surface ( Fig.24 in contact with the lower surface).

[0288] The second stack 322 is positioned between the first stack 321 and the third color filter 235 in the third light transmission area TA3, but may be positioned to contact the lower surface of the second color filter 233 in the second light transmission area TA2. The second stack 322 may serve to protect the second color filter 233 in the second light transmission area TA2.

[0289] In the second light transmission area TA2, the first stack 321 may be positioned between the second substrate 310 and the second color filter 233. Since the refractive index of the first stack 321 has a value between the refractive index of the second substrate 310 and the refractive index of the second color filter 233, the reflectivity of external light incident on the color conversion substrate 30 and reflected may be reduced.

[0290] According to the present embodiment, as described above, since the second stack 322 is selectively positioned between the first stack 321 and the third color filter 235 in the third light transmitting area TA3 , reflectivity of external light in the third light transmitting area TA3 overlapping the third color filter 235 may be reduced.

[0291] Fig.25 is schematically shown along Figure 3 and Figure 4 FIG. 5 is a cross-sectional view of a display device according to yet another embodiment, taken along line BB′.

[0292] refer to Fig.25 The color conversion substrate 30 according to the present embodiment may include a second substrate 310, a first stack 321, color filters 231, 233 and 235, a light blocking member 220, a second stack 322, a light transmissive pattern 330, a first wavelength conversion pattern 340 and a second wavelength conversion pattern 350. Specifically, the present embodiment is different from the above-described Fig.24 The embodiment of the present invention is different in that the position of the light blocking member 220 is different, and other configurations are substantially the same or similar. Therefore, redundant descriptions will be omitted, and the differences will be mainly described.

[0293] like Fig.25 As shown in , the light blocking member 220 may be positioned on one surface of the second substrate 310 facing the display substrate 10 .

[0294] According to an embodiment, the light blocking member 220 may include a first light blocking member 221 overlapping the first light blocking area BA1 , a second light blocking member 222 overlapping the second light blocking area BA2 , and a third light blocking member 223 overlapping the third light blocking area BA3 .

[0295] The light blocking member 220 may be positioned on the second stack 322. Specifically, the first light blocking member 221 may overlap the first light blocking area BA1 and may be positioned on the second stack 322. The first light blocking member 221 may overlap one surface ( Fig.25 The second light blocking member 222 may overlap with the second light blocking area BA2 and may be positioned on the second stack 322. The second light blocking member 222 may contact one surface ( Fig.25 The third light blocking member 223 may overlap with the third light blocking area BA3 and may be positioned on the second stack 322. The third light blocking member 223 may contact one surface ( Fig.25 in contact with the lower surface).

[0296] The first color filter 231 may not overlap with the first light blocking member 221, and may be spaced apart from the first light blocking member 221. The second color filter 233 may overlap with the first light blocking member 221 in the first light blocking area BA1, and may be spaced apart from the first light blocking member 221 due to the second stack 322 positioned between the second color filter 233 and the first light blocking member 221. Similarly, the second color filter 233 may overlap with the second light blocking member 222 in the second light blocking area BA2, and may be spaced apart from the second light blocking member 222 due to the second stack 322 positioned between the second color filter 233 and the second light blocking member 222.

[0297] The third color filter 235 may be connected to one surface ( Fig.25 ), may overlap with the second light blocking member 222 in the second light blocking area BA2, and may contact one surface ( Fig.25 In addition, the third color filter 235 may overlap with the third light blocking member 223 in the third light blocking area BA3, and may contact one surface ( Fig.25 in contact with the lower surface).

[0298] The light blocking member 220 may be aligned with the light blocking area BA (refer to Figure 4 ) overlap to block the transmission of light. According to the present embodiment, the light blocking member 220 can be disposed on the second substrate 310 to be closer to the display substrate 10 from which light is emitted, thereby preventing color mixing due to penetration of light between adjacent light transmission areas, and therefore, the color reproduction rate can be further improved.

[0299] Fig.26 and Fig. 27 is schematically shown along Figure 3 and Figure 4 FIG. 5 is a cross-sectional view of a display device according to yet another embodiment, taken along line BB′.

[0300] like Fig.26 As shown in FIG. 1 , the first stack 321 may be positioned in the remaining areas (i.e., the first light-transmitting area TA1, the first light-blocking area BA1, the second light-blocking area BA2, and the third light-blocking area BA3) except the second light-transmitting area TA2 and the third light-transmitting area TA3. The second stack 322 may be aligned with one surface ( Fig.26 The second color filter 233 may be in direct contact with one surface (the lower surface in the second light transmission area TA2) of the second substrate 310. Fig.26The structure other than the structure of the first stack 321 is the same as described above. Fig.24 The constructions are substantially the same or similar, and thus a detailed description thereof will be omitted.

[0301] According to the present embodiment, reflectivity of external light between the third color filter 235 and the second substrate 310 may be reduced by selectively disposing the second stack 322 between the third color filter 235 and the second substrate 310 in the third light transmitting area TA3.

[0302] In addition, if Fig. 27 As shown in FIG. 1 , the light blocking member 220 may be positioned on the second stack 322. Fig.25 Similar to the position of the light blocking member 220, the first light blocking member 221 may overlap with the first light blocking area BA1 and may be positioned on the second stack 322, the second light blocking member 222 may overlap with the second light blocking area BA2 and may be positioned on the second stack 322, and the third light blocking member 223 may overlap with the third light blocking area BA3 and may be positioned on the second stack 322. The position and configuration of the light blocking member 220 are similar to Fig.25 The descriptions are substantially the same or similar, and thus a detailed description thereof will be omitted.

[0303] Fig.28 and Fig.29 is schematically shown along Figure 3 and Figure 4 FIG. 5 is a cross-sectional view of a display device according to yet another embodiment, taken along line BB′.

[0304] refer to Fig.28 , the color conversion substrate 30 according to the present embodiment may include a second substrate 310, color filters 231, 233 and 235, a light blocking member 220, a second stack 322, a light transmissive pattern 330, a first wavelength conversion pattern 340 and a second wavelength conversion pattern 350. Specifically, the present embodiment is different from the above-described Fig.24 The embodiment of the present invention is different in that the first stacking member 321 is omitted, and other configurations are substantially the same or similar. Therefore, redundant descriptions will be omitted, and the differences will be mainly described.

[0305] refer to Fig.28 , the first color filter 231, the first color pattern 251, the second color pattern 252, and the third color pattern 253 may be positioned on one surface of the second substrate 310 facing the display substrate 10. The first color filter 231, the first color pattern 251, the second color pattern 252, and the third color pattern 253 may be positioned on one surface of the second substrate 310 ( Fig.28 in direct contact with the lower surface of the substrate.

[0306] According to an embodiment, the second stack 322 may be disposed on the first color filter 231, the first light blocking member 221, the second light blocking member 222, the third light blocking member 223, and the second substrate 310. The second stack 322 may be disposed in the first light transmitting area TA1 with respect to one surface ( Fig.28 The lower surface of the second color filter 233 is in direct contact with the lower surface of the second color filter 233 in the second light transmission area TA2. Fig.28 The second stack 322 may be in direct contact with one surface ( Fig.28 in direct contact with the lower surface of the substrate.

[0307] According to an embodiment, the second stack 322 may be in direct contact with the second substrate 310 overlapping the third light transmission area TA3. The second stack 322 may be in direct contact with one surface ( Fig.28 in contact with the upper surface).

[0308] According to the present embodiment, the second stack 322 having a refractive index between the refractive index of the third color filter 235 and the refractive index of the second substrate 310 may be positioned between the third color filter 235 and the second substrate 310 .

[0309] That is, by forming the second stack 322 in the region where the third color filter 235 is positioned, the reflectivity of external light at the interface between the third color filter 235 and the second substrate 310 can be reduced. Although the second stack 322 is described as an example in the present embodiment, the present disclosure is not limited thereto, and the first stack 321 may be positioned instead of the second stack 322.

[0310] At the same time, if Fig.29 As shown in FIG. 1 , the light blocking member 220 may be positioned on the second stack 322. Fig.25 Similar to the position of the light blocking member 220, the first light blocking member 221 may overlap with the first light blocking area BA1 and may be positioned on the second stack 322, the second light blocking member 222 may overlap with the second light blocking area BA2 and may be positioned on the second stack 322, and the third light blocking member 223 may overlap with the third light blocking area BA3 and may be positioned on the second stack 322. The position and configuration of the light blocking member 220 are similar to Fig.25 The descriptions are substantially the same or similar, and thus a detailed description thereof will be omitted.

[0311] like Fig.29As shown in FIG. 1 , the light blocking member 220 may be positioned between the second stack 322 and the first cover layer 391. The light blocking member 220 may be aligned with the light blocking area BA (refer to FIG. 1 ). Figure 4 ) overlap to block the transmission of light. According to the present embodiment, the light blocking member 220 can be disposed on the second substrate 310 to be closer to the display substrate 10 from which light is emitted, thereby preventing color mixing due to penetration of light between adjacent light transmission areas, and therefore, the color reproduction rate can be further improved.

[0312] Fig.30 is schematically shown along Figure 3 and Figure 4 A cross-sectional view of a display device according to yet another embodiment taken along line BB′, and Fig.31 It is schematically shown Fig.30 FIG. 1 is a plan view of a second stack of color conversion substrates.

[0313] refer to Fig.30 The color conversion substrate 30 according to the present embodiment may include a second substrate 310, a first stack 321, color filters 231, 233 and 235, a light blocking member 220, a second stack 322, a light transmissive pattern 330, a first wavelength conversion pattern 340 and a second wavelength conversion pattern 350. Specifically, the present embodiment is different from the above-described Fig. 22 The embodiment of the present invention is different in that the shape of the second stack 322 is different, and the other configurations are substantially the same or similar. Therefore, redundant descriptions will be omitted, and the differences will be mainly described.

[0314] like Fig.30 As shown in , the second stack 322 may be positioned on the first stack 321 , the first color pattern 251 , the second color pattern 252 , the first light blocking member 221 , and the second light blocking member 222 .

[0315] The second stack 322 may overlap with one surface ( Fig.30 ) in direct contact with a surface ( Fig.30 in direct contact with the lower surface of the substrate.

[0316] The second stack 322 may be in direct contact with the first stack 321 overlapping the second light transmission area TA2. According to an embodiment, the second color filter 233 may be positioned in the second light transmission area TA2. The second stack 322 may be in direct contact with one surface ( Fig.30 The upper surface of the first color filter 231 is in direct contact with the first stack 321 and the second color filter 233.

[0317] The second stack 322 may be positioned between the first stack 321 and the second color filter 233 to reduce reflectivity of external light at an interface between the first stack 321 and the second color filter 233. The refractive index of the second stack 322 may have a value between the refractive index of the first stack 321 and the refractive index of the second color filter 233. Similar to the first stack 321 described above, since the refractive index of the second stack 322 has a value between the refractive index of the first stack 321 and the refractive index of the second color filter 233, reflectivity of external light incident on the color conversion substrate 30 and reflected may be reduced.

[0318] The second stack 322 may not overlap the first light transmitting area TA1 and the third light transmitting area TA3. The second stack 322 may not overlap the third light blocking area BA3.

[0319] like Fig.31 As shown in , the second stack 322 may overlap the second light transmitting area TA2 and may be formed in a stripe shape extending in the second direction D2. The second stack 322 may cross the seventh light blocking area BA7 between the first row RT1 and the second row RT2. However, the present disclosure is not limited thereto, and the second stack 322 may also be formed in the form of an island pattern spaced apart from each other in the second direction D2.

[0320] like Fig.30 As shown in FIG. 1 , the third color filter 235 may be positioned in the third light transmission area TA3. The third color filter 235 may be aligned with one surface ( Fig.30 A portion of the third color filter 235 may be in direct contact with one surface ( Fig.30 The third color filter 235 may be in contact with one surface (the lower surface in the middle) of the third light blocking member 223, and another portion of the third color filter 235 may be in contact with one surface ( Fig.30 in contact with the lower surface).

[0321] In the third light-transmitting area TA3, the first stack 321 may be positioned between the second substrate 310 and the third color filter 235. Since the refractive index of the first stack 321 has a value between the refractive index of the second substrate 310 and the refractive index of the third color filter 235, the reflectivity of external light incident on the color conversion substrate 30 and reflected may be reduced.

[0322] According to the present embodiment, as described above, since the second stack 322 does not overlap with the first light transmission area TA1 and the third light transmission area TA3, overlaps with the second light transmission area TA2, and is selectively positioned between the first stack 321 and the second color filter 233, the reflectivity of external light in the second light transmission area TA2 overlapping with the second color filter 233 can be reduced.

[0323] Fig.32 is schematically shown along Figure 3 and Figure 4 A cross-sectional view of a display device according to yet another embodiment taken along line BB′, and Fig.33 It is schematically shown Fig.32 FIG. 1 is a plan view of a second stack of color conversion substrates.

[0324] refer to Fig.32 The color conversion substrate 30 according to the present embodiment may include a second substrate 310, a first stack 321, color filters 231, 233 and 235, a light blocking member 220, a second stack 322, a light transmissive pattern 330, a first wavelength conversion pattern 340 and a second wavelength conversion pattern 350. Specifically, the present embodiment is different from the above-described Fig.30 The embodiment of the present invention is different in that the shape of the second stack 322 and the position of the light blocking member 220 are different, and other configurations are substantially the same or similar. Therefore, redundant descriptions will be omitted, and the differences will be mainly described.

[0325] like Fig.32 As shown in , the second stack 322 may be positioned on one surface of the second substrate 310 facing the display substrate 10 .

[0326] As described above Fig.30 Differently, the second stack 322 may overlap the first light blocking area BA1, the second light blocking area BA2, the third light blocking area BA3, and the second light transmitting area TA2. Specifically, the second stack 322 may overlap all of the first light blocking area BA1, the second light blocking area BA2, the third light blocking area BA3, and the second light transmitting area TA2.

[0327] refer to Fig.32 and Fig.33 , the second stack 322 may overlap the first light blocking area BA1, and may be aligned with one surface ( Fig.32 The second stack 322 may overlap the second light blocking area BA2 and may contact one surface ( Fig.32The second stack 322 may overlap the third light blocking area BA3 and may contact one surface ( Fig.32 The second stack 322 may overlap the second light transmission area TA2, and may contact one surface ( Fig.32 The second stack 322 may not overlap the first light transmitting area TA1 and the third light transmitting area TA3.

[0328] According to the present embodiment, the light blocking member 220 may include a first light blocking member 221 overlapping the first light blocking area BA1 , a second light blocking member 222 overlapping the second light blocking area BA2 , and a third light blocking member 223 overlapping the third light blocking area BA3 .

[0329] like Fig.32 As shown in FIG. 1 , the light blocking member 220 may be positioned on the second stack 322. Specifically, the first light blocking member 221 may overlap the first light blocking area BA1 and may be positioned on the second stack 322. The first light blocking member 221 may overlap one surface ( Fig.32 The second light blocking member 222 may overlap with the second light blocking area BA2 and may be positioned on the second stack 322. The second light blocking member 222 may contact one surface ( Fig.32 The third light blocking member 223 may overlap with the third light blocking area BA3 and may be positioned on the second stack 322. The third light blocking member 223 may contact one surface ( Fig.32 in contact with the lower surface).

[0330] The first color filter 231 may not overlap with the first light blocking member 221 and may be spaced apart from the first light blocking member 221. The second color filter 233 may overlap with one surface ( Fig.32 ), may overlap with the first light blocking member 221 in the first light blocking area BA1, and may be in contact with one surface ( Fig.32 In addition, the second color filter 233 may overlap with the second light blocking member 222 in the second light blocking area BA2, and may contact one surface ( Fig.32 in contact with the lower surface).

[0331] The third color filter 235 may overlap the second light blocking member 222 in the second light blocking area BA2, and may be aligned with one surface ( Fig.32 Similarly, the third color filter 235 may overlap with the third light blocking member 223 in the third light blocking area BA3, and may contact one surface ( Fig.32 in contact with the lower surface).

[0332] The second stack 322 and the light blocking member 220 may completely overlap each other in the first light blocking area BA1, the second light blocking area BA2, and the third light blocking area BA3. At least one side of the second stack 322 and at least one side of the first light blocking member 221 may be aligned with each other and coincide with each other in the first light blocking area BA1, at least one side of the second stack 322 and at least one side of the second light blocking member 222 may be aligned with each other and coincide with each other in the second light blocking area BA2, and at least one side of the second stack 322 and at least one side of the third light blocking member 223 may be aligned with each other and coincide with each other in the third light blocking area BA3.

[0333] The light blocking member 220 may be aligned with the light blocking area BA (refer to Figure 4 ) overlap to block the transmission of light. According to the present embodiment, the light blocking member 220 can be disposed on the second substrate 310 to be closer to the display substrate 10 from which light is emitted, thereby preventing color mixing due to penetration of light between adjacent light transmission areas, and therefore, the color reproduction rate can be further improved.

[0334] Figure 34 to Figure 39 It is used to describe manufacturing Fig.32 A view of a method for a color conversion substrate is shown in FIG.

[0335] refer to Fig.34 , preparing a second substrate 310 having a light-blocking area and a light-transmitting area defined thereon. Fig.34 It is exemplarily shown that a first light transmitting region TA1 , a first light blocking region BA1 , a second light transmitting region TA2 , a second light blocking region BA2 , a third light transmitting region TA3 , and a third light blocking region BA3 are sequentially defined on the second substrate 310 .

[0336] Next, a first stack 321 is formed by stacking an inorganic material on the second substrate 310. The first stack 321 can be formed by a chemical vapor deposition method. Subsequently, a first color filter 231, a first color pattern 251, a second color pattern 252, and a third color pattern 253 are simultaneously formed by using a process (e.g., a photo process) of coating a photosensitive material including a blue colorant on the second substrate 310 and exposing and developing the photosensitive material including a blue colorant. The positions where the first color filter 231, the first color pattern 251, the second color pattern 252, and the third color pattern 253 are formed are the same as described above, and therefore will be omitted. In the accompanying drawings, it is exemplarily shown that the first color filter 231 is formed in the first light transmission area TA1, the first color pattern 251 is formed in the first light blocking area BA1, the second color pattern 252 is formed in the second light blocking area BA2, and the third color pattern 253 is formed in the third light blocking area BA3.

[0337] Subsequently, a second stack material layer 327 is formed on the first stack 321, the first color filter 231, the first color pattern 251, the second color pattern 252, and the third color pattern 253 by laminating an inorganic material on the second substrate 310. The second stack material layer 327 may be formed by a chemical vapor deposition method.

[0338] Then, refer to Fig.35 By coating a photosensitive material including a light blocking material on the second substrate 310 and exposing and developing the photosensitive material, a first light blocking member 221, a second light blocking member 222, and a third light blocking member 223 are formed on the second stacked material layer 327. The first light blocking member 221 is formed to overlap with the first light blocking area BA1, the second light blocking member 222 is formed to overlap with the second light blocking area BA2, and the third light blocking member 223 is formed to overlap with the third light blocking area BA3.

[0339] Subsequently, a second color filter 233 is formed. The second color filter 233 may be formed by a photo process. Fig.35 For example, the second color filter 233 may be formed to overlap the second light transmitting area TA2, the first light blocking area BA1, and the second light blocking area BA2.

[0340] Next, refer to Fig.35 and Fig.36The second stack 322 is formed by etching the second stack material layer 327 using the first light blocking member 221, the second light blocking member 222, the third light blocking member 223 and the second color filter 233 as a mask. The etching of the second stack material layer 327 may be performed by a dry etching process. The second stack 322 may be formed in the second light transmitting area TA2, the first light blocking area BA1, the second light blocking area BA2 and the third light blocking area BA3.

[0341] Then, if Fig.37 As shown in FIG. 3 , a third color filter 235 is formed on the second substrate 310. The third color filter 235 may be formed by a photo process. Fig.37 For example, the third color filter 235 may be formed to overlap the third light transmitting area TA3, the second light blocking area BA2, and the third light blocking area BA3.

[0342] Next, a first capping layer 391 is formed to cover the first color filter 231, the second color filter 233, and the third color filter 235. The first capping layer 391 may be formed by a chemical vapor deposition method.

[0343] Then, if Fig.38 As shown in FIG. 1 , a light-transmitting pattern 330 is formed on a first cover layer 391. The light-transmitting pattern 330 may be formed by a photo process, and may be formed to overlap with the first color filter 231. Subsequently, a first wavelength conversion pattern 340 and a second wavelength conversion pattern 350 are formed on a second substrate 310. The first wavelength conversion pattern 340 may be formed to overlap with the second color filter 233, and the second wavelength conversion pattern 350 may be formed to overlap with the third color filter 235. Each of the first wavelength conversion pattern 340 and the second wavelength conversion pattern 350 may be formed by a photo process, but is not limited thereto.

[0344] Then, if Fig.39 As shown in FIG. 3 , a second cover layer 392 is formed on the entire surface of the second substrate 310, and a color mixture preventing member 370 is formed on the second cover layer 392. The second cover layer 392 may be formed by a chemical vapor deposition method, and the color mixture preventing member 370 may be formed by a photo process. Through the above process, the color conversion substrate 30 may be manufactured.

[0345] According to the method of manufacturing the color conversion substrate described above, since the second stack 322 may be selectively formed in the second light-transmitting area TA2 without performing an additional photo process using a separate mask, the photo process may be reduced.

[0346] Fig.40 and Fig.41 is schematically shown along Figure 3 and Figure 4 FIG. 5 is a cross-sectional view of a display device according to yet another embodiment, taken along line BB′.

[0347] like Fig.40 As shown in FIG. 1 , the first stack 321 may be positioned in the remaining areas (i.e., the first light transmission area TA1, the first light blocking area BA1, the second light blocking area BA2, and the third light blocking area BA3) except the second light transmission area TA2 and the third light transmission area TA3. The second stack 322 may be aligned with one surface ( Fig.40 The third color filter 235 may be in direct contact with one surface (the lower surface in the third light transmission area TA3) of the second substrate 310. Fig.40 The structure other than the structure of the first stack 321 is the same as described above. Fig.30 The constructions are substantially the same or similar, and thus a detailed description thereof will be omitted.

[0348] According to the present embodiment, reflectivity of external light between the second color filter 233 and the second substrate 310 may be reduced by selectively disposing the second stack 322 between the second color filter 233 and the second substrate 310 in a pattern shape in the second light transmitting area TA2 .

[0349] In addition, if Fig.41 As shown in FIG. 1 , the light blocking member 220 may be positioned on the second stack 322. Fig.32 Similar to the position of the light blocking member 220, the first light blocking member 221 may overlap with the first light blocking area BA1 and may be positioned on the second stack 322, the second light blocking member 222 may overlap with the second light blocking area BA2 and may be positioned on the second stack 322, and the third light blocking member 223 may overlap with the third light blocking area BA3 and may be positioned on the second stack 322. The position and configuration of the light blocking member 220 are similar to Fig.32 The descriptions are substantially the same or similar, and thus a detailed description thereof will be omitted.

[0350] Fig.42 and Fig.43 is schematically shown along Figure 3 and Figure 4 FIG. 5 is a cross-sectional view of a display device according to yet another embodiment, taken along line BB′.

[0351] refer to Fig.42, the color conversion substrate 30 according to the present embodiment may include a second substrate 310, color filters 231, 233 and 235, a light blocking member 220, a second stack 322, a light transmissive pattern 330, a first wavelength conversion pattern 340 and a second wavelength conversion pattern 350. Specifically, the present embodiment is different from the above-described Fig.30 The embodiment of the present invention is different in that the first stacking member 321 is omitted, and other configurations are substantially the same or similar. Therefore, redundant descriptions will be omitted, and the differences will be mainly described.

[0352] refer to Fig.42 , the first color filter 231, the third color filter 235, the first color pattern 251, the second color pattern 252, and the third color pattern 253 may be positioned on one surface of the second substrate 310 facing the display substrate 10. The first color filter 231, the third color filter 235, the first color pattern 251, the second color pattern 252, and the third color pattern 253 may be positioned on one surface of the second substrate 310 ( Fig.42 in direct contact with the lower surface of the substrate.

[0353] According to an embodiment, the second stack 322 may be positioned on the first light blocking member 221, the second light blocking member 222, and the second substrate 310. The second stack 322 may overlap one surface ( Fig.42 and may be in direct contact with one surface ( Fig.42 The second stack 322 may be in direct contact with one surface ( Fig.42 in direct contact with the lower surface of the substrate.

[0354] According to the present embodiment, the second stack 322 having a refractive index between the refractive index of the second color filter 233 and the refractive index of the second substrate 310 may be positioned between the second color filter 233 and the second substrate 310 .

[0355] That is, by selectively forming the second stack 322 in a pattern shape in the region where the second color filter 233 is located, the reflectivity of external light at the interface between the second color filter 233 and the second substrate 310 can be reduced. Although the second stack 322 is described as an example in the present embodiment, the present disclosure is not limited thereto, and the first stack 321 may be provided instead of the second stack 322.

[0356] At the same time, if Fig.43 As shown in FIG. 1 , the light blocking member 220 may be positioned on the second stack 322. Fig.32Similar to the position of the light blocking member 220, the first light blocking member 221 may overlap with the first light blocking area BA1 and may be positioned on the second stack 322, the second light blocking member 222 may overlap with the second light blocking area BA2 and may be positioned on the second stack 322, and the third light blocking member 223 may overlap with the third light blocking area BA3 and may be positioned on the second stack 322. The position and configuration of the light blocking member 220 are similar to Fig.32 The descriptions are substantially the same or similar, and thus a detailed description thereof will be omitted.

[0357] like Fig.43 As shown in FIG. 1 , the light blocking member 220 may be positioned between the second stack 322 and the first cover layer 391. The light blocking member 220 may be aligned with the light blocking area BA (refer to FIG. 1 ). Figure 4 ) overlap to block the transmission of light. According to the present embodiment, the light blocking member 220 can be disposed on the second substrate 310 to be closer to the display substrate 10 from which light is emitted, thereby preventing color mixing due to penetration of light between adjacent light transmission areas, and therefore, the color reproduction rate can be further improved.

[0358] Fig.44 is schematically shown along Figure 3 and Figure 4 FIG. 5 is a cross-sectional view of a display device according to yet another embodiment, taken along line BB′.

[0359] refer to Fig.44 The color conversion substrate 30 according to the present embodiment may include a second substrate 310, a first stack 321, color filters 231, 233 and 235, a light blocking member 220, a second stack 322, a light transmissive pattern 330, a first wavelength conversion pattern 340 and a second wavelength conversion pattern 350. Specifically, the present embodiment is different from the above-described Fig.30 The embodiment of the present invention is different in that the shape of the second stack 322 is different, and the other configurations are substantially the same or similar. Therefore, redundant descriptions will be omitted, and the differences will be mainly described.

[0360] like Fig.44 As shown in , the second stack 322 may be positioned on the first stack 321 , the second color pattern 252 , the third color pattern 253 , the second light blocking member 222 , and the third light blocking member 223 .

[0361] The second stack 322 may overlap with one surface ( Fig.44 The lower surface of the third light blocking member 223 may be in direct contact with a surface ( Fig.44in direct contact with the lower surface of the substrate.

[0362] The second stack 322 may overlap one surface ( Fig.44 According to an embodiment, the third color filter 235 may be positioned in the third light transmission area TA3. The second stack 322 may be in direct contact with one surface ( Fig.44 The upper surface of the first stack 321 is in direct contact with the third color filter 235 and can be positioned between the first stack 321 and the third color filter 235.

[0363] The second stack 322 may be positioned between the first stack 321 and the third color filter 235 to reduce reflectivity of external light at an interface between the first stack 321 and the third color filter 235. The refractive index of the second stack 322 may have a value between the refractive index of the first stack 321 and the refractive index of the third color filter 235. Since the refractive index of the second stack 322 has a value between the refractive index of the first stack 321 and the refractive index of the third color filter 235, reflectivity of external light incident on the color conversion substrate 30 and reflected may be reduced.

[0364] The second stack 322 may not overlap the first light transmission area TA1 and the second light transmission area TA2. The second stack 322 may overlap the second light blocking area BA2 and the third light blocking area BA3. The second stack 322 may overlap the third light transmission area TA3 and may be formed in a stripe shape. However, the present disclosure is not limited thereto, and the second stack 322 may also be formed in the form of island patterns spaced apart from each other.

[0365] The second color filter 233 may be positioned in the second light transmission area TA2. The second color filter 233 may be aligned with one surface ( Fig.44 A portion of the second color filter 233 may be in contact with one surface ( Fig.44 ), and another portion of the second color filter 233 may be in contact with one surface ( Fig.44 in contact with the lower surface).

[0366] In the second light transmission area TA2, the first stack 321 may be positioned between the second substrate 310 and the second color filter 233. Since the refractive index of the first stack 321 has a value between the refractive index of the second substrate 310 and the refractive index of the second color filter 233, the reflectivity of external light incident on the color conversion substrate 30 and reflected may be reduced.

[0367] According to the present embodiment, as described above, since the second stack 322 does not overlap with the first light transmission area TA1 and the second light transmission area TA2, overlaps with the third light transmission area TA3, and is selectively positioned between the first stack 321 and the third color filter 235, the reflectivity of external light in the third light transmission area TA3 overlapping with the third color filter 235 can be reduced.

[0368] Fig.45 is schematically shown along Figure 3 and Figure 4 FIG. 5 is a cross-sectional view of a display device according to yet another embodiment, taken along line BB′.

[0369] refer to Fig.45 The color conversion substrate 30 according to the present embodiment may include a second substrate 310, a first stack 321, color filters 231, 233 and 235, a light blocking member 220, a second stack 322, a light transmissive pattern 330, a first wavelength conversion pattern 340 and a second wavelength conversion pattern 350. Specifically, the present embodiment is different from the above-described Fig.44 The embodiment of the present invention is different in that the shape of the second stack 322 and the position of the light blocking member 220 are different, and other configurations are substantially the same or similar. Therefore, redundant descriptions will be omitted, and the differences will be mainly described.

[0370] like Fig.45 As shown in , the second stack 322 may be positioned on one surface of the second substrate 310 facing the display substrate 10 .

[0371] As described above Fig.44 Differently, the second stack 322 may overlap the first light blocking area BA1, the second light blocking area BA2, the third light blocking area BA3, and the third light transmitting area TA3. Specifically, the second stack 322 may overlap all of the first light blocking area BA1, the second light blocking area BA2, the third light blocking area BA3, and the third light transmitting area TA3.

[0372] like Fig.45 As shown in FIG. 1 , the second stack 322 may overlap the first light blocking area BA1 and may be aligned with one surface ( Fig.45 The second stack 322 may overlap the second light blocking area BA2 and may contact one surface ( Fig.45 The second stack 322 may overlap the third light blocking area BA3 and may contact one surface ( Fig.45The second stack 322 may overlap the third light transmission area TA3 and may contact one surface ( Fig.45 The second stack 322 may not overlap the first light transmission area TA1 and the second light transmission area TA2.

[0373] According to the present embodiment, the light blocking member 220 may include a first light blocking member 221 overlapping the first light blocking area BA1 , a second light blocking member 222 overlapping the second light blocking area BA2 , and a third light blocking member 223 overlapping the third light blocking area BA3 .

[0374] like Fig.45 As shown in FIG. 1 , the light blocking member 220 may be positioned on the second stack 322. Specifically, the first light blocking member 221 may overlap the first light blocking area BA1 and may be positioned on the second stack 322. The first light blocking member 221 may overlap one surface ( Fig.45 The second light blocking member 222 may overlap with the second light blocking area BA2 and may be positioned on the second stack 322. The second light blocking member 222 may contact one surface ( Fig.45 The third light blocking member 223 may overlap with the third light blocking area BA3 and may be positioned on the second stack 322. The third light blocking member 223 may contact one surface ( Fig.45 in contact with the lower surface).

[0375] The first color filter 231 may not overlap with the first light blocking member 221 and may be spaced apart from the first light blocking member 221. The third color filter 235 may overlap with one surface ( Fig.45 ), may overlap with the second light blocking member 222 in the second light blocking area BA2, and may contact one surface ( Fig.45 In addition, the third color filter 235 may overlap with the third light blocking member 223 in the third light blocking area BA3, and may contact one surface ( Fig.45 in contact with the lower surface).

[0376] The second color filter 233 may overlap the second stack 322 and the first light blocking member 221 in the first light blocking area BA1, and may be aligned with one surface ( Fig.45Similarly, the second color filter 233 may overlap the second stack 322 and the second light blocking member 222 in the second light blocking area BA2, and may contact one surface ( Fig.45 in contact with the upper surface).

[0377] The second stack 322 and the first light blocking member 221 may completely overlap each other in the first light blocking area BA1, the second stack 322 and the second light blocking member 222 may completely overlap each other in the second light blocking area BA2, and the second stack 322 and the third light blocking member 223 may completely overlap each other in the third light blocking area BA3. At least one side of the second stack 322 and at least one side of the first light blocking member 221 may be aligned with each other and coincide with each other in the first light blocking area BA1, at least one side of the second stack 322 and at least one side of the second light blocking member 222 may be aligned with each other and coincide with each other in the second light blocking area BA2, and at least one side of the second stack 322 and at least one side of the third light blocking member 223 may be aligned with each other and coincide with each other in the third light blocking area BA3.

[0378] As referenced above Figure 34 to Figure 39 As described, the arrangement relationship between the second stack 322 and the light blocking members 221 , 222 , and 223 may be a result of etching the second stack 322 using the first, second, and third light blocking members 221 , 222 , and 223 and the color filter as a mask.

[0379] The light blocking member 220 may be aligned with the light blocking area BA (refer to Figure 4 ) overlap to block the transmission of light. According to the present embodiment, the light blocking member 220 can be disposed on the second substrate 310 to be closer to the display substrate 10 from which light is emitted, thereby preventing color mixing due to penetration of light between adjacent light transmission areas, and therefore, the color reproduction rate can be further improved.

[0380] Fig.46 and Fig.47 is schematically shown along Figure 3 and Figure 4 FIG. 5 is a cross-sectional view of a display device according to yet another embodiment, taken along line BB′.

[0381] like Fig.46As shown in FIG. 1 , the first stack 321 may be positioned in the remaining areas (i.e., the first light-transmitting area TA1, the first light-blocking area BA1, the second light-blocking area BA2, and the third light-blocking area BA3) except the second light-transmitting area TA2 and the third light-transmitting area TA3. The second stack 322 may be aligned with one surface ( Fig.46 The second color filter 233 may be in direct contact with one surface (the lower surface) of the second substrate 310 in the second light-transmitting area TA2. Fig.46 The structure other than the structure of the first stack 321 is the same as described above. Fig.44 The constructions are substantially the same or similar, and thus a detailed description thereof will be omitted.

[0382] According to the present embodiment, reflectivity of external light between the third color filter 235 and the second substrate 310 may be reduced by selectively disposing the second stack 322 between the third color filter 235 and the second substrate 310 in a pattern shape in the third light transmitting area TA3 .

[0383] In addition, if Fig.47 As shown in FIG. 1 , the light blocking member 220 may be positioned on the second stack 322. Fig.45 Similar to the position of the light blocking member 220, the first light blocking member 221 may overlap with the first light blocking area BA1 and may be positioned on the second stack 322, the second light blocking member 222 may overlap with the second light blocking area BA2 and may be positioned on the second stack 322, and the third light blocking member 223 may overlap with the third light blocking area BA3 and may be positioned on the second stack 322. The position and configuration of the light blocking member 220 are similar to Fig.45 The descriptions are substantially the same or similar, and thus a detailed description thereof will be omitted.

[0384] Fig.48 and Fig.49 is schematically shown along Figure 3 and Figure 4 FIG. 5 is a cross-sectional view of a display device according to yet another embodiment, taken along line BB′.

[0385] refer to Fig.48 , the color conversion substrate 30 according to the present embodiment may include a second substrate 310, color filters 231, 233 and 235, a light blocking member 220, a second stack 322, a light transmissive pattern 330, a first wavelength conversion pattern 340 and a second wavelength conversion pattern 350. Specifically, the present embodiment is different from the above-described Fig.44The embodiment of the present invention is different in that the first stacking member 321 is omitted, and other configurations are substantially the same or similar. Therefore, redundant descriptions will be omitted, and the differences will be mainly described.

[0386] refer to Fig.48 , the first color filter 231, the second color filter 233, the first color pattern 251, the second color pattern 252, and the third color pattern 253 may be positioned on one surface of the second substrate 310 facing the display substrate 10. The first color filter 231, the second color filter 233, the first color pattern 251, the second color pattern 252, and the third color pattern 253 may be positioned on one surface of the second substrate 310 ( Fig.48 in direct contact with the lower surface of the substrate.

[0387] According to an embodiment, the second stack 322 may be positioned on the second light blocking member 222, the third light blocking member 223, and the second substrate 310. The second stack 322 may overlap one surface ( Fig.48 and may be in direct contact with one surface ( Fig.48 The second stack 322 may be in direct contact with one surface ( Fig.48 According to an embodiment, the second stack 322 may not overlap the first light transmitting area TA1, the second light transmitting area TA2, and the first light blocking area BA1.

[0388] According to the present embodiment, the second stack 322 having a refractive index between the refractive index of the third color filter 235 and the refractive index of the second substrate 310 may be positioned between the third color filter 235 and the second substrate 310 .

[0389] That is, by selectively forming the second stack 322 in a pattern shape in the region where the third color filter 235 is positioned, the reflectivity of external light at the interface between the third color filter 235 and the second substrate 310 can be reduced. Although the second stack 322 is described as an example in the present embodiment, the present disclosure is not limited thereto, and the first stack 321 may be positioned instead of the second stack 322.

[0390] At the same time, if Fig.49As shown in , the light blocking member 220 may be positioned on the second stack 322. The first light blocking member 221 may overlap the first light blocking area BA1 and may be positioned on the second stack 322, the second light blocking member 222 may overlap the second light blocking area BA2 and may be positioned on the second stack 322, and the third light blocking member 223 may overlap the third light blocking area BA3 and may be positioned on the second stack 322. The position and configuration of the light blocking member 220 are similar to Fig.44 The descriptions are substantially the same or similar, and thus a detailed description thereof will be omitted.

[0391] like Fig.49 As shown in FIG. 1 , the light blocking member 220 may be positioned between the second stack 322 and the first cover layer 391. The light blocking member 220 may be aligned with the light blocking area BA (refer to FIG. 1 ). Figure 4 ) overlap to block the transmission of light. According to the present embodiment, the light blocking member 220 can be disposed on the second substrate 310 to be closer to the display substrate 10 from which light is emitted, thereby preventing color mixing due to penetration of light between adjacent light transmission areas, and therefore, the color reproduction rate can be further improved.

[0392] Fig.50 is schematically shown along Figure 3 and Figure 4 FIG. 5 is a cross-sectional view of a display device according to yet another embodiment, taken along line BB′.

[0393] refer to Fig.50 The color conversion substrate 30 according to the present embodiment may include a second substrate 310, a first stack 321, color filters 231, 233 and 235, a light blocking member 220, a second stack 322, a third stack 323, a light transmissive pattern 330, a first wavelength conversion pattern 340 and a second wavelength conversion pattern 350. Specifically, the present embodiment is different from the above-described Fig.44 The embodiment of the present invention is different in that a third stacking member 323 is further provided, and other configurations are substantially the same or similar. Therefore, redundant descriptions will be omitted, and the differences will be mainly described.

[0394] like Fig.50 , the color conversion substrate 30 may further include a third stack 323 disposed on one surface of the second substrate 310. The third stack 323 may be positioned on the first stack 321, the first color filter 231, the third color filter 235, the first light blocking member 221, the second light blocking member 222, and the third light blocking member 223. The third stack 323 may overlap the entire first stack 321.

[0395] The third stack 323 may overlap the first light transmitting region TA1 and may be aligned with one surface ( Fig.50 The third stack 323 may overlap the first light blocking area BA1 and may be in direct contact with one surface ( Fig.50 The third stack 323 may overlap the second light transmission area TA2, and may contact one surface ( Fig.50 The third stack 323 may overlap the second light blocking area BA2 and may be in direct contact with one surface ( Fig.50 The third stack 323 may overlap the third light transmission area TA3 and may contact one surface ( Fig.50 The third stack 323 may overlap the third light blocking area BA3 and may be in direct contact with one surface ( Fig.50 in direct contact with the lower surface of the substrate.

[0396] The third stack 323 may be in direct contact with the first stack 321 overlapping the second light transmission area TA2. According to an embodiment, the second color filter 233 may be positioned in the second light transmission area TA2. The third stack 323 may be in direct contact with one surface ( Fig.50 The upper surface of the first color filter 231 is in direct contact with the first stack 321 and the second color filter 233.

[0397] The third stack 323 may be positioned between the first stack 321 and the second color filter 233 to reduce reflectivity of external light at an interface between the first stack 321 and the second color filter 233. The refractive index of the third stack 323 may have a value between the refractive index of the first stack 321 and the refractive index of the second color filter 233. Since the refractive index of the third stack 323 has a value between the refractive index of the first stack 321 and the refractive index of the second color filter 233, reflectivity of external light incident on the color conversion substrate 30 and reflected may be reduced.

[0398] According to the present embodiment, as described above, since the third stack 323 overlaps the second light transmission area TA2 and is selectively positioned between the first stack 321 and the second color filter 233 , reflectivity of external light in the second light transmission area TA2 overlapping the second color filter 233 may be reduced.

[0399] Fig.51 is schematically shown along Figure 3 and Figure 4 FIG. 5 is a cross-sectional view of a display device according to yet another embodiment, taken along line BB′.

[0400] refer to Fig.51 The color conversion substrate 30 according to the present embodiment may include a second substrate 310, a first stack 321, color filters 231, 233 and 235, a light blocking member 220, a second stack 322, a third stack 323, a light transmissive pattern 330, a first wavelength conversion pattern 340 and a second wavelength conversion pattern 350. Specifically, the present embodiment is different from the above-described Fig.50 The embodiment of the present invention is different in that the shape of the second stack 322 and the position of the light blocking member 220 are different, and other configurations are substantially the same or similar. Therefore, redundant descriptions will be omitted, and the differences will be mainly described.

[0401] like Fig.51 As shown in , the second stack 322 may be positioned on one surface of the second substrate 310 facing the display substrate 10 .

[0402] As described above Fig.50 Differently, the second stack 322 may overlap the first light blocking area BA1, the second light blocking area BA2, the third light blocking area BA3, and the third light transmitting area TA3. Specifically, the second stack 322 may overlap all of the first light blocking area BA1, the second light blocking area BA2, the third light blocking area BA3, and the third light transmitting area TA3.

[0403] like Fig.51 As shown in FIG. 1 , the second stack 322 may overlap the first light blocking region BA1 and may be aligned with one surface ( Fig.51 The second stack 322 may overlap the second light blocking area BA2 and may contact one surface ( Fig.51 The second stack 322 may overlap the third light blocking area BA3 and may contact one surface ( Fig.51 The second stack 322 may overlap the third light transmission area TA3 and may contact one surface ( Fig.51 The second stack 322 may not overlap the first light transmission area TA1 and the second light transmission area TA2.

[0404] According to the present embodiment, the light blocking member 220 may include a first light blocking member 221 overlapping the first light blocking area BA1 , a second light blocking member 222 overlapping the second light blocking area BA2 , and a third light blocking member 223 overlapping the third light blocking area BA3 .

[0405] like Fig.51 As shown in FIG. 1 , the light blocking member 220 may be positioned on the second stack 322. Specifically, the first light blocking member 221 may overlap the first light blocking area BA1 and may be positioned on the second stack 322. The first light blocking member 221 may overlap one surface ( Fig.51 The second light blocking member 222 may overlap with the second light blocking area BA2 and may be positioned on the second stack 322. The second light blocking member 222 may contact one surface ( Fig.51 The third light blocking member 223 may overlap with the third light blocking area BA3 and may be positioned on the second stack 322. The third light blocking member 223 may contact one surface ( Fig.51 in contact with the lower surface).

[0406] The first color filter 231 may not overlap with the first light blocking member 221 and may be spaced apart from the first light blocking member 221. The third color filter 235 may overlap with one surface ( Fig.51 ), may overlap with the second light blocking member 222 in the second light blocking area BA2, and may contact one surface ( Fig.51 In addition, the third color filter 235 may overlap with the third light blocking member 223 in the third light blocking area BA3, and may contact one surface ( Fig.51 in contact with the lower surface).

[0407] As described above Fig.50 Similarly, the third stack 323 may cover the first stack 321 , the first color filter 231 , the third color filter 235 , the first light blocking member 221 , the second light blocking member 222 , and the third light blocking member 223 .

[0408] The second color filter 233 may be positioned on the third stack 323 and may be aligned with one surface ( Fig.51 The second color filter 233 may overlap the third stack 323 and the first light blocking member 221 in the first light blocking area BA1, and may contact one surface ( Fig.51Similarly, the second color filter 233 may overlap the third stack 323 and the second light blocking member 222 in the second light blocking area BA2, and may contact one surface ( Fig.51 in contact with the lower surface).

[0409] The light blocking member 220 may overlap the light blocking area BA to block the transmission of light. According to the present embodiment, the light blocking member 220 may be disposed on the second substrate 310 to be closer to the display substrate 10 from which light is emitted, thereby preventing color mixing due to penetration of light between adjacent light transmission areas, and thus, the color reproduction rate may be further improved.

[0410] Fig.52 and Fig.53 is schematically shown along Figure 3 and Figure 4 FIG. 5 is a cross-sectional view of a display device according to yet another embodiment, taken along line BB′.

[0411] At the same time, if Fig.52 As shown in FIG. 1 , the first stack 321 may be positioned in the remaining areas (i.e., the first light-transmitting area TA1, the first light-blocking area BA1, the second light-blocking area BA2, and the third light-blocking area BA3) except the second light-transmitting area TA2 and the third light-transmitting area TA3. The second stack 322 may be aligned with one surface ( Fig.52 The third stack 323 may be in direct contact with one surface ( Fig.52 The structure other than the structure of the first stack 321 is the same as described above. Fig.50 The constructions are substantially the same or similar, and thus a detailed description thereof will be omitted.

[0412] According to the present embodiment, the reflectivity of external light between the third color filter 235 and the second substrate 310 may be reduced by selectively disposing the second stack 322 in a pattern shape between the third color filter 235 and the second substrate 310 in the third light transmission area TA3. In addition, the reflectivity of external light between the second color filter 233 and the second substrate 310 may be reduced by selectively disposing the third stack 323 between the second color filter 233 and the second substrate 310 in the second light transmission area TA2.

[0413] In addition, if Fig.53 As shown in FIG. 1 , the light blocking member 220 may be positioned on the second stack 322. Fig.51Similar to the position of the light blocking member 220, the first light blocking member 221 may overlap with the first light blocking area BA1 and may be positioned on the second stack 322, the second light blocking member 222 may overlap with the second light blocking area BA2 and may be positioned on the second stack 322, and the third light blocking member 223 may overlap with the third light blocking area BA3 and may be positioned on the second stack 322. The position and configuration of the light blocking member 220 are similar to Fig.51 The descriptions are substantially the same or similar, and thus a detailed description thereof will be omitted.

[0414] Fig.54 and Fig.55 is schematically shown along Figure 3 and Figure 4 FIG. 5 is a cross-sectional view of a display device according to yet another embodiment, taken along line BB′.

[0415] refer to Fig.54 The color conversion substrate 30 according to the present embodiment may include a second substrate 310, color filters 231, 233 and 235, a light blocking member 220, a second stack 322, a third stack 323, a light transmissive pattern 330, a first wavelength conversion pattern 340 and a second wavelength conversion pattern 350. Specifically, the present embodiment is different from the above-described Fig.50 The embodiment of the present invention is different in that the first stacking member 321 is omitted, and other configurations are substantially the same or similar. Therefore, redundant descriptions will be omitted, and the differences will be mainly described.

[0416] refer to Fig.54 , the first color filter 231, the first color pattern 251, the second color pattern 252, and the third color pattern 253 may be positioned on one surface of the second substrate 310 facing the display substrate 10. The first color filter 231, the first color pattern 251, the second color pattern 252, and the third color pattern 253 may be positioned on one surface of the second substrate 310 ( Fig.54 in direct contact with the lower surface of the substrate.

[0417] According to an embodiment, the second stack 322 may overlap with one surface ( Fig.54 and may be in direct contact with one surface ( Fig.54 The second stack 322 may be in direct contact with one surface ( Fig.54According to an embodiment, the second stack 322 may not overlap the first light transmitting area TA1, the second light transmitting area TA2, and the first light blocking area BA1.

[0418] According to an embodiment, the third stack 323 may overlap one surface ( Fig.54 and may be in direct contact with one surface ( Fig.54 According to an embodiment, the third stack 323 may overlap the first to third light-transmitting areas TA1 to TA3 and the first to third light-blocking areas BA1 to BA3.

[0419] According to the present embodiment, the second stack 322 having a refractive index between the third color filter 235 and the second substrate 310 may be positioned between the third color filter 235 and the second substrate 310. In addition, the third stack 323 having a refractive index between the second color filter 233 and the second substrate 310 may be positioned between the second color filter 233 and the second substrate 310.

[0420] That is, by forming the third stack 323 in a plate shape between the second color filter 233 and the second substrate 310 and selectively forming the second stack 322 in a pattern shape between the third color filter 235 and the second substrate 310, the reflectivity of external light at the interface between the second color filter 233 and the second substrate 310 and at the interface between the third color filter 235 and the second substrate 310 can be reduced. According to the present embodiment, the positions of the second stack 322 and the third stack 323 can be changed from each other.

[0421] At the same time, if Fig.55 As shown in , the light blocking member 220 may be positioned on the second stack 322. The first light blocking member 221 may overlap the first light blocking area BA1 and may be positioned on the second stack 322, the second light blocking member 222 may overlap the second light blocking area BA2 and may be positioned on the second stack 322, and the third light blocking member 223 may overlap the third light blocking area BA3 and may be positioned on the second stack 322. The position and configuration of the light blocking member 220 are similar to Fig.51 The descriptions are substantially the same or similar, and thus a detailed description thereof will be omitted.

[0422] like Fig.55 As shown in FIG. 1 , the light blocking member 220 may be positioned between the second stack 322 and the first cover layer 391. The light blocking member 220 may be aligned with the light blocking area BA (refer to FIG. 1 ). Figure 4 ) overlap to block the transmission of light. According to the present embodiment, the light blocking member 220 can be disposed on the second substrate 310 to be closer to the display substrate 10 from which light is emitted, thereby preventing color mixing due to penetration of light between adjacent light transmission areas, and therefore, the color reproduction rate can be further improved.

[0423] Fig.56 is schematically shown along Figure 3 and Figure 4 FIG. 5 is a cross-sectional view of a display device according to yet another embodiment, taken along line BB′.

[0424] refer to Fig.56 The color conversion substrate 30 according to the present embodiment may include a second substrate 310, a first stack 321, color filters 231, 233 and 235, a light blocking member 220, a second stack 322, a third stack 323, a light transmissive pattern 330, a first wavelength conversion pattern 340 and a second wavelength conversion pattern 350. Specifically, the present embodiment is different from the above-described Fig.30 The embodiment of the present invention is different in that a third stacking member 323 is further included, and other configurations are substantially the same or similar. Therefore, redundant descriptions will be omitted, and the differences will be mainly described.

[0425] like Fig.56 As shown in , the color conversion substrate 30 may further include a third stack 323 disposed on one surface of the second substrate 310. The third stack 323 may be positioned on the first stack 321, the first color filter 231, the second color filter 233, the first light blocking member 221, the second light blocking member 222, and the third light blocking member 223. The third stack 323 may overlap the entire first stack 321.

[0426] The third stack 323 may overlap the first light transmitting region TA1 and may be aligned with one surface ( Fig.56 The third stack 323 may overlap the first light blocking area BA1 and may be in direct contact with one surface ( Fig.56 The third stack 323 may overlap the third light transmission area TA3, and may contact one surface ( Fig.56 The third stack 323 may overlap the second light blocking area BA2 and may be in direct contact with one surface ( Fig.56The third stack 323 may overlap the second light transmission area TA2, and may contact one surface ( Fig.56 The third stack 323 may overlap the third light blocking area BA3 and may be in direct contact with one surface ( Fig.56 in direct contact with the lower surface of the substrate.

[0427] The third stack 323 may overlap one surface ( Fig.56 According to an embodiment, the third color filter 235 may be positioned in the third light transmission area TA3. The third stack 323 may be in direct contact with one surface ( Fig.56 The upper surface of the first stack 321 is in direct contact with the third color filter 235 and can be positioned between the first stack 321 and the third color filter 235.

[0428] The third stack 323 may be positioned between the first stack 321 and the third color filter 235 to reduce reflectivity of external light at an interface between the first stack 321 and the third color filter 235. The refractive index of the third stack 323 may have a value between the refractive index of the first stack 321 and the refractive index of the third color filter 235. Since the refractive index of the third stack 323 has a value between the refractive index of the first stack 321 and the refractive index of the third color filter 235, reflectivity of external light incident on the color conversion substrate 30 and reflected may be reduced.

[0429] According to the present embodiment, as described above, because the third stack 323 overlaps the third light transmitting area TA3 and is selectively positioned between the first stack 321 and the third color filter 235 , reflectivity of external light in the third light transmitting area TA3 overlapping the third color filter 235 may be reduced.

[0430] Fig.57 is schematically shown along Figure 3 and Figure 4 FIG. 5 is a cross-sectional view of a display device according to yet another embodiment, taken along line BB′.

[0431] refer to Fig.57 The color conversion substrate 30 according to the present embodiment may include a second substrate 310, a first stack 321, color filters 231, 233 and 235, a light blocking member 220, a second stack 322, a third stack 323, a light transmissive pattern 330, a first wavelength conversion pattern 340 and a second wavelength conversion pattern 350. Specifically, the present embodiment is different from the above-described Fig.56The embodiment of the present invention is different in that the shape of the second stack 322 and the position of the light blocking member 220 are different, and other configurations are substantially the same or similar. Therefore, redundant descriptions will be omitted, and the differences will be mainly described.

[0432] like Fig.57 As shown in , the second stack 322 may be positioned on one surface of the second substrate 310 facing the display substrate 10 .

[0433] As described above Fig.56 Differently, the second stack 322 may overlap the first light blocking area BA1, the second light blocking area BA2, the third light blocking area BA3, and the second light transmitting area TA2. Specifically, the second stack 322 may overlap all of the first light blocking area BA1, the second light blocking area BA2, the third light blocking area BA3, and the second light transmitting area TA2.

[0434] like Fig.57 As shown in FIG. 1 , the second stack 322 may overlap the first light blocking region BA1 and may be aligned with one surface ( Fig.57 The second stack 322 may overlap the second light blocking area BA2 and may contact one surface ( Fig.57 The second stack 322 may overlap the third light blocking area BA3 and may contact one surface ( Fig.57 The second stack 322 may overlap the second light transmission area TA2, and may contact one surface ( Fig.57 The second stack 322 may not overlap the first light transmitting area TA1 and the third light transmitting area TA3.

[0435] According to the present embodiment, the light blocking member 220 may include a first light blocking member 221 overlapping the first light blocking area BA1 , a second light blocking member 222 overlapping the second light blocking area BA2 , and a third light blocking member 223 overlapping the third light blocking area BA3 .

[0436] like Fig.57 As shown in FIG. 1 , the light blocking member 220 may be positioned on the second stack 322. Specifically, the first light blocking member 221 may overlap the first light blocking area BA1 and may be positioned on the second stack 322. The first light blocking member 221 may overlap one surface ( Fig.57The second light blocking member 222 may overlap with the second light blocking area BA2 and may be positioned on the second stack 322. The second light blocking member 222 may contact one surface ( Fig.57 The third light blocking member 223 may overlap with the third light blocking area BA3 and may be positioned on the second stack 322. The third light blocking member 223 may contact one surface ( Fig.57 in contact with the lower surface).

[0437] The first color filter 231 may not overlap with the first light blocking member 221 and may be spaced apart from the first light blocking member 221. The second color filter 233 may overlap with one surface ( Fig.57 ), may overlap with the first light blocking member 221 in the first light blocking area BA1, and may be in contact with one surface ( Fig.57 In addition, the second color filter 233 may overlap with the second light blocking member 222 in the second light blocking area BA2, and may contact one surface ( Fig.57 in contact with the lower surface).

[0438] As described above Fig.56 Similarly, the third stack 323 may cover the first stack 321 , the first color filter 231 , the second color filter 233 , the first light blocking member 221 , the second light blocking member 222 , and the third light blocking member 223 .

[0439] The third color filter 235 may be positioned on the third stack 323 and may be aligned with one surface ( Fig.57 The third color filter 235 may overlap the third stack 323 and the second light blocking member 222 in the second light blocking area BA2, and may contact one surface ( Fig.57 Similarly, the third color filter 235 may overlap the third stack 323 and the third light blocking member 223 in the third light blocking area BA3, and may contact one surface ( Fig.57 in contact with the lower surface).

[0440] The light blocking member 220 may be aligned with the light blocking area BA (refer to Figure 4) overlap to block the transmission of light. According to the present embodiment, the light blocking member 220 can be disposed on the second substrate 310 to be closer to the display substrate 10 from which light is emitted, thereby preventing color mixing due to penetration of light between adjacent light transmission areas, and therefore, the color reproduction rate can be further improved.

[0441] Fig.58 and Fig.59 is schematically shown along Figure 3 and Figure 4 FIG. 5 is a cross-sectional view of a display device according to yet another embodiment, taken along line BB′.

[0442] like Fig.58 As shown in FIG. 1 , the first stack 321 may be positioned in the remaining areas (i.e., the first light transmission area TA1, the first light blocking area BA1, the second light blocking area BA2, and the third light blocking area BA3) except the second light transmission area TA2 and the third light transmission area TA3. The second stack 322 may be aligned with one surface ( Fig.58 The third stack 323 may be in direct contact with one surface ( Fig.58 The structure other than the structure of the first stack 321 is the same as described above. Fig.56 The constructions are substantially the same or similar, and thus a detailed description thereof will be omitted.

[0443] According to the present embodiment, the reflectivity of external light between the second color filter 233 and the second substrate 310 can be reduced by selectively disposing the second stack 322 in a pattern shape between the second color filter 233 and the second substrate 310 in the second light transmission area TA2. In addition, the reflectivity of external light between the third color filter 235 and the second substrate 310 can be reduced by selectively disposing the third stack 323 between the third color filter 235 and the second substrate 310 in the third light transmission area TA3.

[0444] In addition, if Fig.59 As shown in FIG. 1 , the light blocking member 220 may be positioned on the second stack 322. Fig.57 Similar to the position of the light blocking member 220, the first light blocking member 221 may overlap with the first light blocking area BA1 and may be positioned on the second stack 322, the second light blocking member 222 may overlap with the second light blocking area BA2 and may be positioned on the second stack 322, and the third light blocking member 223 may overlap with the third light blocking area BA3 and may be positioned on the second stack 322. The position and configuration of the light blocking member 220 are similar to Fig.57The descriptions are substantially the same or similar, and thus a detailed description thereof will be omitted.

[0445] Fig.60 and Fig.61 is schematically shown along Figure 3 and Figure 4 FIG. 5 is a cross-sectional view of a display device according to yet another embodiment, taken along line BB′.

[0446] refer to Fig.60 The color conversion substrate 30 according to the present embodiment may include a second substrate 310, color filters 231, 233 and 235, a light blocking member 220, a second stack 322, a third stack 323, a light transmissive pattern 330, a first wavelength conversion pattern 340 and a second wavelength conversion pattern 350. Specifically, the present embodiment is different from the above-described Fig.56 The embodiment of the present invention is different in that the first stacking member 321 is omitted, and other configurations are substantially the same or similar. Therefore, redundant descriptions will be omitted, and the differences will be mainly described.

[0447] refer to Fig.60 , the first color filter 231, the first color pattern 251, the second color pattern 252, and the third color pattern 253 may be positioned on one surface of the second substrate 310 facing the display substrate 10. The first color filter 231, the first color pattern 251, the second color pattern 252, and the third color pattern 253 may be positioned on one surface of the second substrate 310 ( Fig.60 in direct contact with the lower surface of the substrate.

[0448] According to an embodiment, the second stack 322 may overlap with one surface ( Fig.60 and may be in direct contact with one surface ( Fig.60 The second stack 322 may be in direct contact with one surface ( Fig.60 According to an embodiment, the second stack 322 may not overlap the first light transmitting area TA1, the third light transmitting area TA3, and the third light blocking area BA3.

[0449] According to an embodiment, the third stack 323 may overlap one surface ( Fig.60 and may be in direct contact with one surface ( Fig.60According to an embodiment, the third stack 323 may overlap the first to third light-transmitting areas TA1 to TA3 and the first to third light-blocking areas BA1 to BA3.

[0450] According to the present embodiment, the second stack 322 having a refractive index between the second color filter 233 and the second substrate 310 may be positioned between the second color filter 233 and the second substrate 310. In addition, the third stack 323 having a refractive index between the third color filter 235 and the second substrate 310 may be positioned between the third color filter 235 and the second substrate 310.

[0451] That is, by forming the third stack 323 in a plate shape between the third color filter 235 and the second substrate 310 and selectively forming the second stack 322 in a pattern shape between the second color filter 233 and the second substrate 310, the reflectivity of external light at the interface between the second color filter 233 and the second substrate 310 and at the interface between the third color filter 235 and the second substrate 310 can be reduced. According to the present embodiment, the positions of the second stack 322 and the third stack 323 can be changed from each other.

[0452] At the same time, if Fig.61 As shown in , the light blocking member 220 may be positioned on the second stack 322. The first light blocking member 221 may overlap the first light blocking area BA1 and may be positioned on the second stack 322, the second light blocking member 222 may overlap the second light blocking area BA2 and may be positioned on the second stack 322, and the third light blocking member 223 may overlap the third light blocking area BA3 and may be positioned on the second stack 322. The position and configuration of the light blocking member 220 are similar to Fig.57 The descriptions are substantially the same or similar, and thus a detailed description thereof will be omitted.

[0453] Fig.62 is schematically shown along Figure 3 and Figure 4 FIG. 5 is a cross-sectional view of a display device according to yet another embodiment, taken along line BB′.

[0454] refer to Fig.62 The color conversion substrate 30 according to the present embodiment may include a second substrate 310, a first stack 321, color filters 231, 233 and 235, a light blocking member 220, a second stack 322, a third stack 323, a light transmissive pattern 330, a first wavelength conversion pattern 340 and a second wavelength conversion pattern 350. Specifically, the present embodiment is different from the above-described Fig.56The embodiment of the present invention is different in that the third stack 323 is patterned, and the other configurations are substantially the same or similar. Therefore, redundant descriptions will be omitted, and the differences will be mainly described.

[0455] like Fig.62 As shown in FIG. 3 , the third stack 323 may be positioned on the first stack 321, the second light blocking member 222, and the third light blocking member 223. The third stack 323 may overlap the first stack 321 positioned in the third light transmitting area TA3.

[0456] The third stack 323 may overlap the third light transmitting region TA3 and may be aligned with one surface ( Fig.62 The third stack 323 may overlap the second light blocking area BA2 and may be in direct contact with one surface ( Fig.62 The third stack 323 may overlap with the third light blocking area BA3 and may contact one surface ( Fig.62 The third stack 323 may not overlap the first light transmission area TA1 and the second light transmission area TA2.

[0457] The third stack 323 may be positioned between the first stack 321 and the third color filter 235 to reduce reflectivity of external light at an interface between the first stack 321 and the third color filter 235. The refractive index of the third stack 323 may have a value between the refractive index of the first stack 321 and the refractive index of the third color filter 235. Since the refractive index of the third stack 323 has a value between the refractive index of the first stack 321 and the refractive index of the third color filter 235, reflectivity of external light incident on the color conversion substrate 30 and reflected may be reduced.

[0458] According to the present embodiment, as described above, since the third stack 323 overlaps the third light transmitting area TA3 and is selectively positioned between the first stack 321 and the third color filter 235 , reflectivity of external light in the third light transmitting area TA3 overlapping the third color filter 235 may be reduced.

[0459] Fig.63 is schematically shown along Figure 3 and Figure 4 FIG. 5 is a cross-sectional view of a display device according to yet another embodiment, taken along line BB′.

[0460] refer to Fig.63The color conversion substrate 30 according to the present embodiment may include a second substrate 310, a first stack 321, color filters 231, 233 and 235, a light blocking member 220, a second stack 322, a third stack 323, a light transmissive pattern 330, a first wavelength conversion pattern 340 and a second wavelength conversion pattern 350. Specifically, the present embodiment is different from the above-described Fig.62 The embodiment of the present invention is different in that the shape of the second stack 322 and the position of the light blocking member 220 are different, and other configurations are substantially the same or similar. Therefore, redundant descriptions will be omitted, and the differences will be mainly described.

[0461] like Fig.63 As shown in , the third stack 323 may be positioned on one surface of the second substrate 310 facing the display substrate 10 .

[0462] As described above Fig.62 Differently, the second stack 322 may overlap the first light blocking area BA1, the second light blocking area BA2, the third light blocking area BA3, and the second light transmitting area TA2. Specifically, the second stack 322 may overlap all of the first light blocking area BA1, the second light blocking area BA2, the third light blocking area BA3, and the second light transmitting area TA2.

[0463] like Fig.63 As shown in FIG. 1 , the third stack 323 may overlap the second light blocking area BA2 and may be aligned with one surface ( Fig.63 The third stack 323 may overlap with the third light blocking area BA3 and may contact one surface ( Fig.63 The third stack 323 may overlap the third light transmission area TA3, and may contact one surface ( Fig.63 in contact with the lower surface).

[0464] According to the present embodiment, the light blocking member 220 may include a first light blocking member 221 overlapping the first light blocking area BA1 , a second light blocking member 222 overlapping the second light blocking area BA2 , and a third light blocking member 223 overlapping the third light blocking area BA3 .

[0465] like Fig.63 As shown in FIG. 1 , the light blocking member 220 may be positioned on the second stack 322. Specifically, the first light blocking member 221 may overlap the first light blocking area BA1 and may be positioned on the second stack 322. The first light blocking member 221 may overlap one surface ( Fig.63The second light blocking member 222 may overlap with the second light blocking area BA2 and may be positioned on the second stack 322. The second light blocking member 222 may contact one surface ( Fig.63 The third light blocking member 223 may overlap with the third light blocking area BA3 and may be positioned on the second stack 322. The third light blocking member 223 may contact one surface ( Fig.63 in contact with the lower surface).

[0466] The second light blocking member 222 may overlap the second light blocking area BA2 and may be positioned between the second stack 322 and the third stack 323. The second light blocking member 222 may overlap one surface ( Fig.63 The third light blocking member 223 may overlap with the third light blocking area BA3 and may be positioned between the second stack 322 and the third stack 323. The third light blocking member 223 may contact one surface ( Fig.63 in contact with the upper surface).

[0467] The light blocking member 220 may be aligned with the light blocking area BA (refer to Figure 4 ) overlap to block the transmission of light. According to the present embodiment, the light blocking member 220 can be disposed on the second substrate 310 to be closer to the display substrate 10 from which light is emitted, thereby preventing color mixing due to penetration of light between adjacent light transmission areas, and therefore, the color reproduction rate can be further improved.

[0468] Fig.64 and Fig.65 is schematically shown along Figure 3 and Figure 4 FIG. 5 is a cross-sectional view of a display device according to yet another embodiment, taken along line BB′.

[0469] like Fig.64 As shown in FIG. 1 , the first stack 321 may be positioned in the remaining areas (i.e., the first light transmission area TA1, the first light blocking area BA1, the second light blocking area BA2, and the third light blocking area BA3) except the second light transmission area TA2 and the third light transmission area TA3. The second stack 322 may be aligned with one surface ( Fig.64 The third stack 323 may be in direct contact with one surface ( Fig.64 The structure other than the structure of the first stack 321 is the same as described above. Fig.62The constructions are substantially the same or similar, and thus a detailed description thereof will be omitted.

[0470] According to the present embodiment, the reflectivity of external light between the second color filter 233 and the second substrate 310 can be reduced by selectively disposing the second stack 322 in a pattern shape between the second color filter 233 and the second substrate 310 in the second light transmission area TA2. In addition, the reflectivity of external light between the third color filter 235 and the second substrate 310 can be reduced by selectively disposing the third stack 323 between the third color filter 235 and the second substrate 310 in the third light transmission area TA3.

[0471] In addition, if Fig.65 As shown in FIG. 1 , the light blocking member 220 may be positioned on the second stack 322. Fig.63 Similar to the position of the light blocking member 220, the first light blocking member 221 may overlap with the first light blocking area BA1 and may be positioned on the second stack 322, the second light blocking member 222 may overlap with the second light blocking area BA2 and may be positioned on the second stack 322, and the third light blocking member 223 may overlap with the third light blocking area BA3 and may be positioned on the second stack 322. The position and configuration of the light blocking member 220 are similar to Fig.63 The descriptions are substantially the same or similar, and thus a detailed description thereof will be omitted.

[0472] Fig.66 and Fig.67 is schematically shown along Figure 3 and Figure 4 FIG. 5 is a cross-sectional view of a display device according to yet another embodiment, taken along line BB′.

[0473] refer to Fig.66 The color conversion substrate 30 according to the present embodiment may include a second substrate 310, color filters 231, 233 and 235, a light blocking member 220, a second stack 322, a third stack 323, a light transmissive pattern 330, a first wavelength conversion pattern 340 and a second wavelength conversion pattern 350. Specifically, the present embodiment is different from the above-described Fig.62 The embodiment of the present invention is different in that the first stacking member 321 is omitted, and other configurations are substantially the same or similar. Therefore, redundant descriptions will be omitted, and the differences will be mainly described.

[0474] refer to Fig.66, the first color filter 231, the first color pattern 251, the second color pattern 252, and the third color pattern 253 may be positioned on one surface of the second substrate 310 facing the display substrate 10. The first color filter 231, the first color pattern 251, the second color pattern 252, and the third color pattern 253 may be positioned on one surface of the second substrate 310 ( Fig.66 in direct contact with the lower surface of the substrate.

[0475] According to an embodiment, the second stack 322 may overlap with one surface ( Fig.66 and may be in direct contact with one surface ( Fig.66 The second stack 322 may be in direct contact with one surface ( Fig.66 According to an embodiment, the second stack 322 may not overlap the first light transmitting area TA1, the third light transmitting area TA3, and the third light blocking area BA3.

[0476] According to an embodiment, the third stack 323 may overlap one surface ( Fig.66 and may be in direct contact with one surface ( Fig.66 According to an embodiment, the third stack 323 may not overlap the first light transmitting area TA1, the second light transmitting area TA2, and the first light blocking area BA1.

[0477] According to the present embodiment, the second stack 322 having a refractive index between the second color filter 233 and the second substrate 310 may be positioned between the second color filter 233 and the second substrate 310. In addition, the third stack 323 having a refractive index between the third color filter 235 and the second substrate 310 may be positioned between the third color filter 235 and the second substrate 310.

[0478] That is, by selectively forming the second stack 322 in a pattern shape between the second color filter 233 and the second substrate 310 and selectively forming the third stack 323 in a pattern shape between the third color filter 235 and the second substrate 310, the reflectivity of external light at the interface between the second color filter 233 and the second substrate 310 and at the interface between the third color filter 235 and the second substrate 310 can be reduced. According to the present embodiment, the positions of the second stack 322 and the third stack 323 can be changed from each other.

[0479] At the same time, if Fig.67 As shown in , the light blocking member 220 may be positioned on the second stack 322. The first light blocking member 221 may overlap the first light blocking area BA1 and may be positioned on the second stack 322, the second light blocking member 222 may overlap the second light blocking area BA2 and may be positioned on the second stack 322, and the third light blocking member 223 may overlap the third light blocking area BA3 and may be positioned on the second stack 322. The position and configuration of the light blocking member 220 are similar to Fig.63 The descriptions are substantially the same or similar, and thus a detailed description thereof will be omitted.

[0480] Fig.68 is schematically shown along Figure 3 and Figure 4 FIG. 5 is a cross-sectional view of a display device according to yet another embodiment, taken along line BB′.

[0481] like Fig.68 As shown in FIG, the first stack 321 may be positioned in the remaining regions (ie, the first light transmitting region TA1, the first light blocking region BA1, the second light blocking region BA2, and the third light blocking region BA3) except the second light transmitting region TA2 and the third light transmitting region TA3. Fig.68 The color conversion substrate 30 shown in FIG. Fig.13 The color conversion substrate 30 is different in that the second stack 322 is omitted. Fig.68 The structure and Fig.13 The configurations other than the second stack 322 in the color conversion substrate 30 are substantially the same or similar, and thus a detailed description thereof will be omitted.

[0482] like Fig.68 As shown in FIG. 1 , the second color filter 233 may be positioned between the second substrate 310 and the first cover layer 391 in the second light transmission area TA2. The second color filter 233 may be aligned with one surface ( Fig.68 ) and may be in direct contact with one surface ( Fig.68 in direct contact with the upper surface of the substrate.

[0483] According to an embodiment, the second color filter 233 may overlap with one surface ( 100 ) of the first light blocking member 221 that overlaps with the first light blocking area BA1. Fig.68 and may be in contact with one surface ( Fig.68 in contact with the lower surface).

[0484] The third color filter 235 may be positioned between the second substrate 310 and the first cover layer 391 in the third light transmission area TA3. The third color filter 235 may be aligned with one surface ( Fig.68 ) and may be in direct contact with one surface ( Fig.68 in direct contact with the upper surface of the substrate.

[0485] According to an embodiment, the third color filter 235 may overlap with one surface ( 100 ) of the second light blocking member 222 that overlaps with the second light blocking area BA2. Fig.68 and may be in contact with one surface ( Fig.68 in contact with the lower surface).

[0486] The second color filter 233 and the third color filter 235 may be formed in a pattern shape, respectively, and may not overlap each other. The second color filter 233 may not overlap the first light transmission area TA1 and the third light transmission area TA3. The third color filter 235 may not overlap the first light transmission area TA1 and the second light transmission area TA2.

[0487] According to this embodiment, by forming a first stack 321 between the first light transmission area TA1, each of the first color pattern 251, the second color pattern 252 and the third color pattern 253 and the second substrate 310, the reflectivity of external light between the first light transmission area TA1 and the second substrate 310, between the first color pattern 251 and the second substrate 310, between the second color pattern 252 and the second substrate 310, and between the third color pattern 253 and the second substrate 310 can be reduced.

[0488] Fig.69 is schematically shown along Figure 3 and Figure 4 FIG. 5 is a cross-sectional view of a display device according to yet another embodiment, taken along line BB′.

[0489] Fig.69 Examples and Fig.11 The embodiment of FIG. 1 is different in that the arrangement of the light transmissive pattern 330, the first wavelength conversion pattern 340, the second wavelength conversion pattern 350, the color mixing preventing member 370, and the second cover layer 392 is different.

[0490] refer to Fig.69, the light-transmitting pattern 330, the first wavelength conversion pattern 340, and the second wavelength conversion pattern 350 may be positioned on the first cover layer 391. The light-transmitting pattern 330, the first wavelength conversion pattern 340, and the second wavelength conversion pattern 350 may be disposed to be aligned with one surface ( Fig.69 The color mixing preventing member 370 may be disposed on the first cover layer 391. The color mixing preventing member 370 may be disposed on the same plane as the light transmissive pattern 330, the first wavelength conversion pattern 340, and the second wavelength conversion pattern 350. According to an exemplary embodiment, the color mixing preventing member 370 may be disposed in contact with the lower surface of the first cover layer 391.

[0491] The second covering layer 392 may be disposed on the light-transmitting pattern 330, the first wavelength conversion pattern 340, the second wavelength conversion pattern 350, and the color mixing preventing member 370. The second covering layer 392 may cover one surface of each of the light-transmitting pattern 330, the first wavelength conversion pattern 340, the second wavelength conversion pattern 350, and the color mixing preventing member 370. Fig.69 the lower surface in the middle).

[0492] In the color conversion substrate 30 according to the embodiment, the light transmission pattern 330, the first wavelength conversion pattern 340 and the second wavelength conversion pattern 350 may be formed by an inkjet process. For example, after the color mixing prevention member 370 is patterned and formed on the second substrate 310 on which the first cover layer 391 is disposed, the light transmission pattern 330, the first wavelength conversion pattern 340 and the second wavelength conversion pattern 350 may be formed in the first light transmission area TA1, the second light transmission area TA2 and the third light transmission area TA3 defined between the color mixing prevention members 370, respectively, by an inkjet process. Thereafter, the color conversion substrate 30 may be manufactured by forming the second cover layer 392. Fig.69 The embodiments are not limited thereto and can be applied to each of the above-described embodiments.

[0493] Fig.70 is a graph showing SCI and SCE according to whether the color conversion substrate includes a SiON film.

[0494] exist Fig.70 The color conversion substrate used in the Fig.16, and includes a SiON film as a second stack 322. An anti-reflection film is attached to the outer surface of the second substrate of the color conversion substrate. The reflectivity is measured using a CA-3700 reflectivity measuring instrument. SCI (specular component included) is the reflectivity including specular light, and SCE (specular component excluded) is the reflectivity from which specular light is removed. The SCI value is indicated on the upper side of the bar, and the SCE value is indicated by adding x in front of the number on the bar.

[0495] refer to Fig.70 , when the SiON film as the second stack is not provided, in the R color filter region, the SCI value is measured to be 1.75%, and the SCE value is measured to be 0.30%. In the G color filter region, the SCI value is measured to be 1.76%, and the SCE value is measured to be 0.28%. In the B color filter region, the SCI value is measured to be 0.55%, and the SCE value is measured to be 0.11%.

[0496] On the other hand, when a SiON film as the second stack is provided, in the R color filter region, the SCI value is measured to be 1.57% and the SCE value is measured to be 0.30%, and the SCI value is reduced by about 10%. In the G color filter region, the SCI value is measured to be 1.69% and the SCE value is measured to be 0.28%, and the SCI value is reduced by about 4%. Here, in the B color filter region where the SiON film is provided, the SCI value is measured to be 0.61% and the SCE value is measured to be 0.11%, and the SCI value is increased by about 11%.

[0497] Through this, it can be confirmed that in the R filter region and the G filter region in which the SiON layer is provided between the color filter and the second substrate, the SCI value is reduced.

[0498] As described above, the color conversion substrate according to the embodiment has an advantage of reducing the reflectivity of external light.

[0499] The above drawings illustrate the embodiments of the present invention, but it is understood by those skilled in the art that the present invention can be implemented in other specific forms without departing from the technical concept or essential features of the present invention. Therefore, the above embodiments can be understood to be illustrative in all aspects and not restrictive.

Claims

1. A color conversion substrate, comprising: a second substrate, on which a first light-transmitting region, a second light-transmitting region, and a third light-transmitting region are defined; a first stack positioned on the second substrate and overlapping the first light-transmitting area, the second light-transmitting area, and the third light-transmitting area; a first color filter, a second color filter, and a third color filter positioned on the first stack, the first color filter overlapping the first light-transmitting area, the second color filter overlapping the second light-transmitting area, and the third color filter overlapping the third light-transmitting area; as well as a second stack positioned between at least one of the second color filter and the third color filter and the first stack, The refractive index of the first stack has a value between the refractive index of the second substrate and the refractive index of the first color filter, and The refractive index of the first stack is less than a refractive index of the second stack.

2. The color conversion substrate according to claim 1, wherein The second stack extends from at least one of the second light-transmitting area and the third light-transmitting area to overlap with the first light-transmitting area.

3. The color conversion substrate according to claim 1, wherein: The second stack is positioned between the first stack and the second color filter in the second light-transmitting region, and is positioned between the first stack and the third color filter in the third light-transmitting region.

4. The color conversion substrate of claim 1, wherein: The second stack is positioned between the first stack and the second color filter in the second light transmitting area and does not overlap with the first light transmitting area and the third light transmitting area.

5. The color conversion substrate of claim 4, further comprising a third stack positioned on the first stack, in, The third stack is positioned between the first stack and the third color filter in the third light-transmitting region.

6. The color conversion substrate of claim 5, wherein: The third stack extends from the third light-transmitting area to overlap the first light-transmitting area and the second light-transmitting area.

7. The color conversion substrate of claim 6, wherein: A refractive index of the third stack has a value between the refractive index of the first stack and a refractive index of the third color filter.

8. A color conversion substrate comprising: a second substrate, on which a first light-transmitting region, a second light-transmitting region, and a third light-transmitting region are defined; a first color filter, a second color filter, and a third color filter, the first color filter being positioned on the second substrate and overlapping the first light transmission area, the second color filter being positioned on the second substrate and overlapping the second light transmission area, and the third color filter being positioned on the second substrate and overlapping the third light transmission area; as well as a second stack positioned between at least one of the second color filter and the third color filter and the second substrate, wherein a refractive index of the second stack has a value between a refractive index of the second substrate and a refractive index of at least one of the second color filter and the third color filter.

9. The color conversion substrate of claim 8, further comprising a first stack overlapping the first light-transmitting area, the first stack being positioned between the second substrate and the first color filter and not overlapping the second light-transmitting area and the third light-transmitting area.

10. The color conversion substrate of claim 9, wherein: The second stack extends from at least one of the second light-transmitting area and the third light-transmitting area to overlap with the first light-transmitting area.

11. The color conversion substrate of claim 10, wherein: The refractive index of the first stack has a value between the refractive index of the second substrate and the refractive index of the first color filter, and The refractive index of the first stack is less than the refractive index of the second stack.

12. The color conversion substrate of claim 10, wherein: The second stack is positioned between the second substrate and the second color filter in the second light-transmitting region, and between the second substrate and the third color filter in the third light-transmitting region.

13. The color conversion substrate of claim 8, wherein: The second stack is positioned between the second substrate and the second color filter in the second light-transmitting area and does not overlap with the first light-transmitting area and the third light-transmitting area.

14. The color conversion substrate of claim 13, further comprising a third stack positioned on the second substrate, in, The third stack is positioned between the second substrate and the third color filter in the third light-transmitting region.

15. The color conversion substrate of claim 14, wherein: The third stack extends from the third light-transmitting area to overlap the first light-transmitting area and the second light-transmitting area.

16. The color conversion substrate of claim 15, wherein: A refractive index of the third stack has a value between the refractive index of the second substrate and a refractive index of the third color filter.

17. A display device, comprising: a second substrate, on which a first light-transmitting region, a second light-transmitting region, and a third light-transmitting region are defined; a first color filter, a second color filter, and a third color filter positioned on the second substrate, the first color filter overlapping the first light-transmitting area, the second color filter overlapping the second light-transmitting area, and the third color filter overlapping the third light-transmitting area; a second stack positioned between at least one of the first color filter, the second color filter, and the third color filter and the second substrate; as well as a first stack positioned between the second substrate and the second stack and overlapping the first light-transmitting area, the second light-transmitting area, and the third light-transmitting area, The refractive index of the first stack has a value between the refractive index of the second substrate and the refractive index of the first color filter, and The first stack has a refractive index less than a refractive index of the second stack.

18. The display device according to claim 17, further comprising a third stack positioned on the second substrate, in, The third stack is positioned between the second substrate and the third color filter in the third light-transmitting region.

19. The display device according to claim 18, wherein: The third stack extends from the third light-transmitting area to overlap the first light-transmitting area and the second light-transmitting area.

20. The display device according to claim 19, wherein: A refractive index of the third stack has a value between a refractive index of the second substrate and a refractive index of the third color filter.

21. The display device according to claim 17, further comprising: a light-transmitting pattern disposed on the first color filter and overlapping the first light-transmitting region; a first wavelength conversion pattern disposed on the second color filter and overlapping the second light-transmitting area; as well as A second wavelength conversion pattern is positioned on the third color filter and overlaps the third light-transmitting area.

22. The display device according to claim 21, wherein: The first wavelength conversion pattern and the second wavelength conversion pattern include a base resin and wavelength shifters and scatterers dispersed in the base resin, and The wavelength shifter is a quantum dot.

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