Patent Publication Number: US-2023163255-A1

Title: Color conversion substrate and display device including the same

Description:
CROSS-REFERENCE TO RELATED APPLICATION 
     The present application claims priority to and the benefit of Korean Patent Application No. 10-2021-0163338, filed on Nov. 24, 2021, Korean Patent Application No. 10-2022-0024735, filed on Feb. 25, 2022, the entire content of each of which is incorporated herein by reference. 
     BACKGROUND 
     1. Field 
     Aspects of some embodiments of the present invention relate to a color conversion substrate and a display device including the color conversion substrate. 
     2. Description of the Related Art 
     Flat panel devices are replacing cathode ray tube display devices as display devices due to their relatively lightweight and thin characteristics. Flat panel display devices include, for example, liquid crystal display devices and organic light emitting diode display devices. 
     A display device including a display substrate including pixels and a color conversion substrate including a color filter and a color conversion part may be utilized to improve display quality. The color conversion part may convert a wavelength of a light provided from the display substrate. Accordingly, the display device including the color conversion part may emit a light having a color different from that of an incident light. For example, the color conversion part may include a wavelength conversion particle such as a quantum dot. 
     The above information disclosed in this Background section is only for enhancement of understanding of the background and therefore the information discussed in this Background section does not necessarily constitute prior art. 
     SUMMARY 
     Aspects of some embodiments include a color conversion substrate capable of preventing or reducing an abnormal phenomenon occurring in an edge area of the display device. 
     Aspects of some embodiments also include a display device including the color conversion substrate. 
     A color conversion substrate according to some embodiments may include a base substrate including a display area, a peripheral area positioned around the display area, and a sealing area positioned around the peripheral area, a color filter layer in the display area under the base substrate, a color conversion layer including a plurality of color conversion parts spaced apart from each other on a bottom surface of the color filter layer, a light blocking member in the peripheral area and the sealing area under the base substrate and including light blocking layers, wherein the light blocking layers may overlap each other in a first direction that is a thickness direction of the base substrate and extend in a second direction perpendicular to the first direction, and a column spacer on a bottom surface of the light blocking member and extending in the second direction to be in the peripheral area and the sealing area. 
     According to some embodiments, a portion of the column spacer may overlap a sealing member in the sealing area. 
     According to some embodiments, a side surface of the column spacer may be exposed at an outermost edge of the sealing area. 
     According to some embodiments, the column spacer may comprise a polymer resin and a pigment or a dye may be dispersed in the polymer resin. 
     According to some embodiments, the color conversion substrate may further include a low refractive index layer surrounding the color filter layer and the light blocking member, and the column spacer may be on a bottom surface of the low refractive index layer. 
     According to some embodiments, the color conversion substrate may further include a first capping layer on the bottom surface of the low refractive index layer, and a second capping layer on a bottom surface of the first capping layer in the peripheral area and the sealing area and on a bottom surface of the color conversion layer in the display area. The column spacer may be on a bottom surface of the second capping layer. 
     According to some embodiments, the color conversion substrate may further include a low refractive index layer surrounding the color conversion layer and the light blocking member, and the column spacer may be on a bottom surface of the low refractive index layer. 
     According to some embodiments, the color conversion substrate may further include a first capping layer on the bottom surface of the low refractive index layer, and the column spacer may be on a bottom surface of the first capping layer. 
     According to some embodiments, the light blocking member may include a first light blocking layer, a second light blocking layer, and a third light blocking layer overlapping each other in the first direction. 
     According to some embodiments, the color filter layer may include a red color filter, a green color filter, and a blue color filter. The color conversion layer may include a first color conversion part corresponding to the red color filter, a second color conversion part corresponding to the green color filter, and a third color conversion part corresponding to the blue color filter. 
     According to some embodiments, the first color conversion part may include a first wavelength conversion particle that convert an incident light into a light having a red color, the second color conversion part may include a second wavelength conversion particle that convert an incident light into a light having a green color, and the third conversion part may include a third wavelength conversion particle that convert an incident a light into a blue color. 
     According to some embodiments, the first color conversion part, the second color conversion part, and the third color conversion part may further include a scattering particle configured to scatter an incident light. 
     According to some embodiments, the color filter layer may include a red color filter, a green color filter, and a blue color filter. The color conversion layer may include a first color conversion part corresponding to the red color filter, a second color conversion part corresponding to the green color filter, and a light transmitting part corresponding to the blue color filter. 
     According to some embodiments, the light transmitting part may include a scattering particle configured to scatter an incident light. 
     A color conversion substrate according to some embodiments may include a base substrate including a display area, a peripheral area positioned around the display area, and a sealing area positioned around the peripheral area, a color filter layer in the display area under the base substrate, a color conversion layer including a plurality of color conversion parts spaced apart from each other on a bottom surface of the color filter layer, a light blocking member in the peripheral area and the sealing area under the base substrate and including light blocking layers, wherein the light blocking layers may overlap each other in a first direction that is a thickness direction of the base substrate and extend in a second direction perpendicular to the first direction, and a column spacer on a bottom surface of the light blocking member and extending in the second direction so as not to be in the sealing area but to be in the peripheral area. 
     A display device according to some embodiments may include a display substrate including a first base substrate and pixels on the first base substrate, a color conversion substrate facing the display substrate, and a sealing member bonding the display substrate and the color conversion substrate. The color conversion substrate may include a base substrate including a display area, a peripheral area positioned around the display area, and a sealing area positioned around the peripheral area, a color filter layer in the display area under the base substrate, a color conversion layer including a plurality of color conversion parts spaced apart from each other on a bottom surface of the color filter layer, a light blocking member in the peripheral area and the sealing area under the base substrate and including light blocking layers, wherein the light blocking layers may overlap each other in a first direction that is a thickness direction of the base substrate and extend in a second direction perpendicular to the first direction, and a column spacer on a bottom surface of the light blocking member and extending in the second direction to be in the peripheral area and the sealing area. 
     According to some embodiments, the display device may further include an encapsulation layer covering the pixels and including at least one inorganic encapsulation layer and at least one organic encapsulation layer. 
     According to some embodiments, the display device may further include a filling layer between the display substrate and the color conversion substrate. 
     According to some embodiments, a first distance between the first base substrate and the second base substrate in the sealing area may be greater than a second distance between the first base substrate and the second base substrate in the display area. 
     According to some embodiments, all of the pixels may be configured to generate blue light. 
     According to some embodiments, a portion of the column spacer may overlap a sealing member in the sealing area. 
     According to some embodiments, a side of the column spacer may be exposed at an outermost edge of the sealing area. 
     The display device according to some embodiments may include the display substrate and the color conversion substrate. The color conversion substrate may include the light blocking member in the peripheral area and the sealing area to surround the display area, and the column spacer on a bottom surface of the light blocking member. While the display substrate and the color conversion substrate are bonded, the column spacer may minimize deformation of the display substrate and the color conversion substrate due to external pressure. Accordingly, the abnormal phenomena occurring in the edge area of the display device may be prevented or reduced. 
     It is to be understood that both the foregoing general description and the following detailed description are merely example characteristics and explanatory and are intended to provide further explanation of embodiments according to the invention as claimed. 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
       Illustrative, non-limiting embodiments will be more clearly understood from the following detailed description taken in conjunction with the accompanying drawings. 
         FIG.  1    is a plan view illustrating a display device according to some embodiments. 
         FIG.  2    is a cross-sectional view taken along the line I-I′ of  FIG.  1    according to some embodiments. 
         FIG.  3    is an enlarged cross-sectional view of an example of area ‘A’ of  FIG.  2    according to some embodiments. 
         FIG.  4    is an enlarged cross-sectional view of another example of area ‘A’ of  FIG.  2    according to some embodiments. 
         FIGS.  5  to  10    are cross-sectional views illustrating a method of manufacturing a color conversion substrate included in the display device of  FIG.  3    according to some embodiments. 
         FIGS.  11  to  12    are cross-sectional views illustrating display device according to some embodiments. 
         FIG.  13    is a cross-sectional view illustrating display device according to some embodiments. 
         FIG.  14    is a cross-sectional view illustrating display device according to some embodiments. 
     
    
    
     DETAILED DESCRIPTION 
     Aspects of some embodiments of the invention now will be described more fully hereinafter with reference to the accompanying drawings, in which various embodiments are shown. This invention may, however, be embodied in many different forms, and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be more thorough and more complete, and will more fully convey the scope of embodiments according to the present invention to those skilled in the art. Like reference numerals refer to like elements throughout. 
       FIG.  1    is a plan view illustrating a display device according to some embodiments.  FIG.  2    is a cross-sectional view taken along the line I-I′ of  FIG.  1   . 
     Referring to  FIGS.  1  and  2   , a display device  10  may include a first substrate  100 , a second substrate  200 , and a sealing member  300 . The second substrate  200  may face the first substrate  100 , and may be positioned in a first direction D 1  from the first substrate  100 . For example, the first direction D 1  is a front direction (e.g., a direction facing away from, or normal with respect to, a display surface of the display device  10 ) of the display device  10 . The sealing member  300  may bond the first substrate  100  and the second substrate  200  to each other. 
     The display device  10  may include a display area DA on which an image is displayed, a peripheral area PA positioned around the display area DA, and a sealing area SA positioned around the peripheral area PA. For example, the peripheral area PA may surround the display area DA in a plan view, and the sealing area SA may surround the peripheral area PA in a plan view. 
     The first substrate  100  may include a plurality of pixels and may be referred to as a display substrate. The pixels may be located in the display area DA of the first substrate  100 . Each of the pixels may include a driving element and a light emitting element. The driving element may include at least one thin film transistor. The light emitting element may generate light based on a driving signal. For example, the light emitting element may be an inorganic light emitting diode or an organic light emitting diode. 
     The second substrate  200  may include a color conversion part and may be referred to as a color conversion substrate. The color conversion part may be located in the display area DA and may convert a wavelength of a light generated from the light emitting element of the first substrate  100 . The second substrate  200  may further include a color filter layer to transmit a light having a specific color. 
     The sealing member  300  may bond the first substrate  100  and the second substrate  200  to each other. The sealing member  300  may be located in the sealing area SA between the first substrate  100  and the second substrate  200 . For example, the sealing member  300  may be located in the sealing area SA between the first substrate  100  and the second substrate  200  to surround the peripheral area PA in a plan view. Thus, the sealing member  300  may be located at the outer edges of the display device  10 . 
     For example, the sealing member  300  may have a hollow rectangular shape (e.g., a rectangular frame shape) in a plan view. That is, the sealing member  300  may be located around the perimeter of (e.g., outside a footprint of) the peripheral area PA and the display area DA, while not being located in the peripheral area PA or the display area DA. However, embodiments are not limited thereto, and the sealing member  300  may have various planar shapes corresponding to a planar shape of the first substrate  100  and/or the second substrate  200 . For example, when the first substrate  100  and/or the second substrate  200  has a planar shape such as a triangle, a rhombus, a polygon, a circle, an oval, or the like, the sealing member  300  may have a hollow triangle, a hollow rhombus, a hollow polygon, a hollow circle, a hollow oval, or the like in a plan view. 
     According to some embodiments, a filling layer may be located between the first substrate  100  and the second substrate  200 . For example, the filling layer may function as a buffer against external pressure applied to the display device  10 . For example, the filling layer may maintain a gap between the first substrate  100  and the second substrate  200 , and may fill a space or gap between the first substrate  100  and the second substrate  200 . 
       FIG.  3    is an enlarged cross-sectional view of an example of area ‘A’ of  FIG.  2   . 
     Referring to  FIGS.  1  to  3   , the display area DA may include a light emitting area and a light blocking area BA. A light generated by the first substrate  100  and incident into the second substrate  200  (hereinafter, an incident light L 1 ) may be emitted to an outside through the light emitting area. The light emitting area may include first to third light emitting areas LA 1 , LA 2 , and LA 3  for emitting light of different colors. For example, the first light emitting area LA 1  may emit a first transmitted light L 2 R having a red color, the second light emitting area LA 2  may emit a second transmitted light L 2 G having a green color, and the third light emitting area LA 3  may emit a third transmitted light L 2 B having a blue color. 
     According to some embodiments, the first to third light emitting areas LA 1 , LA 2 , and LA 3  may be spaced apart from each other in a plan view, and may be arranged in a repeated sequence. The light blocking area BA may be surround the first to third light emitting areas LA 1 , LA 2 , and LA 3  in a plan view. For example, the light blocking area BA may have a grid shape in a plan view. 
     According to some embodiments, the first substrate  100  may include a first base substrate  110 , a buffer layer  120 , first to third driving elements TR 1 , TR 2 , and TR 3 , an insulating structure  130 , a pixel defining layer  140 , first to third light emitting elements LED 1 , LED 2 , and LED 3 , and an encapsulation layer  150 . 
     The first base substrate  110  may be an insulating substrate formed of a transparent or opaque material. According to some embodiments, the first base substrate  110  may include glass. In this case, the first substrate  100  may be a rigid display substrate. According to some embodiments, the first base substrate  110  may include plastic. In this case, the first substrate  100  may be a flexible display substrate. 
     According to some embodiments, the first base substrate  110  may include a light blocking material. For example, at least a portion of the first base substrate  110  may include a light blocking material such as a black pigment, a dye, a carbon black, or the like. That is, the first base substrate  110  may be black. 
     The buffer layer  120  may be located on the first base substrate  110 . The buffer layer  120  may prevent or reduce impurities such as oxygen or moisture from diffusing to an upper portion of the first base substrate  110  through the first base substrate  110 . The buffer layer  120  may include an inorganic insulating material such as a silicon compound, a metal oxide, or the like. Examples of the inorganic insulating material may include silicon oxide (“SiO”), silicon nitride (“SiN”), silicon oxynitride (“SiON”), silicon oxycarbide (“SiOC”), silicon carbonitride (“SiCN”), aluminum oxide (“Ala”), aluminum nitride (“AlN”), tantalum oxide (“TaO”), hafnium oxide (“HfO”), zirconium oxide (“ZrO”), titanium oxide (“TiO”), or the like. These can be used alone or in a combination thereof. The buffer layer  120  may have a single-layered structure or a multi-layered structure including a plurality of insulating layers. 
     The first to third driving elements TR 1 , TR 2 , and TR 3  may be located in the display area DA on the buffer layer  120 . Each of the first to third driving elements TR 1 , TR 2 , and TR 3  may include at least one thin film transistor. A channel layer of the thin film transistor may include an oxide semiconductor, a silicon semiconductor, an organic semiconductor, or the like. For example, the oxide semiconductor may include at least one oxide of indium (“In”), gallium (“Ga”), tin (“Sn”), zirconium (“Zr”), vanadium (“V”), hafnium (“Hf”), cadmium (“Cd”), germanium (“Ge”), chromium (“Cr”), titanium (“Ti”), and zinc (“Zn”). The silicon semiconductor may include an amorphous silicon, a polycrystalline silicon, or the like. 
     The insulating structure  130  may cover the first to third driving elements TR 1 , TR 2  and TR 3 . The insulating structure  130  may include a combination of an inorganic insulating layer and an organic insulating layer. 
     First to third pixel electrodes AE 1 , AE 2 , and AE 3  may be located on the insulating structure  130 . Each of the first to third pixel electrodes AE 1 , AE 2 , and AE 3  may include a conductive material such as a metal, an alloy, a conductive metal nitride, a conductive metal oxide, a transparent conductive material, or the like. Each of the first to third pixel electrodes AE 1 , AE 2 , and AE 3  may have a single-layered structure or a multi-layered structure including a plurality of conductive layers. 
     The first to third pixel electrodes AE 1 , AE 2 , and AE 3  may be electrically connected to the first to third driving elements TR 1 , TR 2 , and TR 3  through contact holes formed in the insulating structure  130 , respectively. 
     The pixel defining layer  140  may be located on the first to third pixel electrodes AE 1 , AE 2 , and AE 3 . The pixel defining layer  140  may include an organic insulating material. Examples of the organic insulating material include a photoresist, a polyacryl-based resin, a polyimide-based resin, a polyamide-based resin, a siloxane-based resin, an acryl-based resin, an epoxy-based resin, or the like. These can be used alone or in a combination thereof. The pixel defining layer  140  may define pixel openings respectively exposing at least a portion of each of the first to third pixel electrodes AE 1 , AE 2 , and AE 3 . 
     An emission layer EL may be located on the first to third pixel electrodes AE 1 , AE 2 , and AE 3  exposed by the pixel openings of the pixel defining layer  140 . According to some embodiments, the emission layer EL may continuously extend over the plurality of pixels in the display area DA. According to some embodiments, the emission layer EL may be separated from an emission layer of an adjacent pixel. 
     The emission layer EL may include at least one of an organic light emitting material or a quantum dot. According to some embodiments, the emission layer EL may generate a blue light. However, embodiments according to the present disclosure are not limited thereto. For example, the emission layer EL may generate a red light, a green light, or the like. According to some embodiments, the emission layer EL may generate lights having different colors in different pixels. 
     According to some embodiments, functional layers such as a hole injection layer, a hole transport layer, an electron transport layer, and an electron injection layer may be located on an upper portion and/or a lower portion of the emission layer EL. 
     A common electrode CE may be located on the emission layer EL. The common electrode CE may include a conductive material such as a metal, an alloy, a conductive metal nitride, a conductive metal oxide, a transparent conductive material, or the like. The common electrode CE may have a single-layered structure or a multi-layered structure including a plurality of conductive layers. According to some embodiments, the common electrode CE may continuously extend over the plurality of pixels in the display area DA. 
     The first electrode AE 1 , the emission layer EL, and the common electrode CE may form the first light emitting element LED 1 . The second pixel electrode AE 2 , the emission layer EL, and the common electrode CE may form the second light emitting element LED 2 . The third pixel electrode AE 3 , the emission layer EL, and the common electrode CE may form the third light emitting element LED 3 . 
     The encapsulation layer  150  may be located on the common electrode CE. The encapsulation layer  150  may include at least one inorganic encapsulation layer and at least one organic encapsulation layer. According to some embodiments, the encapsulation layer  150  may include a first inorganic encapsulation layer  151  located on the common electrode CE, an organic encapsulation layer  152  located on the first inorganic encapsulation layer  151 , and a second inorganic encapsulation layer  153  located on the organic encapsulation layer  152 . 
     According to some embodiments, a dam DM may be located in the peripheral area PA on the first base substrate  110 . For example, the dam DM may surround the display area DA in a plan view. The dam DM may prevent an organic material from overflowing to an outside of the dam DM (e.g., to a second direction D 2  in  FIG.  3   ) during a formation of the organic encapsulation layer  152 . 
     The second substrate  200  may be located in the first direction D 1  from the encapsulation layer  150 . Hereinafter, the first direction D 1  may be referred to as a front direction or a thickness direction. 
     According to some embodiments, the second substrate  200  may include a second base substrate  210 , an organic layer  220 , a color filter layer  230 , a partition wall  240 , a color conversion layer  250 , and a light blocking member  260 . 
     The second base substrate  210  may be an insulating substrate formed of a transparent material. The second base substrate  210  may include glass or plastic. The second base substrate  210  may include the display area DA, the peripheral area PA, and the sealing area SA. 
     The organic layer  220  may be located in the display area DA under the second base substrate  210 . According to some embodiments, the organic layer  220  may overlap the light blocking area BA, and may not overlap the first to third light emitting areas LA 1 , LA 2 , and LA 3 . That is, the organic layer  220  may define the light blocking area BA and the first to third light emitting areas LA 1 , LA 2 , and LA 3  in the display area DA. The organic layer  220  may be formed of a transparent or opaque organic material. According to some embodiments, the organic layer  220  may also overlap the first to third light emitting areas LA 1 , LA 2 , and LA 3 . 
     The color filter layer  230  may be located in the display area DA under the second base substrate  210 . According to some embodiments, the color filter layer  230  may include a red color filter  230 R, a green color filter  230 G, and a blue color filter  230 B. 
     The red color filter  230 R may overlap the first light emitting area LA 1 , and may selectively transmit red light. The green color filter  230 G may overlap the second light emitting area LA 2 , and may selectively transmit green light. The blue color filter  230 B may overlap the third light emitting area LA 3 , and may selectively transmit blue light. 
     According to some embodiments, each of the red color filter  230 R, the green color filter  230 G, and the blue color filter  230 B may further overlap the light blocking area BA. That is, as illustrated in  FIG.  3   , the red color filter  230 R may overlap the first light emitting area LA 1  and the light blocking area BA, and may not overlap the second and third light emitting areas LA 2  and LA 3 . The green color filter  230 G may overlap the second light emitting area LA 2  and the light blocking area BA, and may not overlap the first and third light emitting areas LA 1  and LA 3 . The blue color filter  230 B may overlap the third light emitting area LA 3  and the light blocking area BA, and may not overlap the first and second light emitting areas LA 1  and LA 2 . In this case, in the light blocking area BA, a portion of the red color filter  230 R, a portion of the green color filter  230 G, and a portion of the blue color filter  230 B may overlap each other in the first direction D 1 . Accordingly, color mixing between the adjacent first to third light emitting areas LA 1 , LA 2 , and LA 3  may be prevented. 
     The partition wall  240  may be located in the display area DA under the color filter layer  230 . A plurality of openings may be formed in the partition wall  240 . For example, as illustrated in  FIG.  3   , the openings of the partition wall  240  may expose the first to third light emitting areas LA 1 , LA 2 , and LA 3 , respectively. The partition wall  240  may form a space to receive an ink composition for forming the color conversion layer  250 . For example, the partition wall  240  may entirely overlap the light blocking area BA, and may have a grid shape in a plan view. 
     According to some embodiments, the partition wall  240  may include an organic material. According to some embodiments, the partition wall  240  may further include a light blocking material. For example, at least a portion of the partition wall  240  may include a light blocking material such as black pigment, a dye, a carbon black, or the like. 
     The color conversion layer  250  may include color conversion parts spaced apart from each other on a bottom surface of the color filter layer. According to some embodiments, the color conversion layer  250  may include a first color conversion part  252 , a second color conversion part  254 , and a third color conversion part  256 . The first color conversion part  252 , the second color conversion part  254 , and the third color conversion part  256  may be located in the display area DA under the color filter layer  230 , and may overlap the first to third light emitting areas LA 1 , LA 2  and LA 3 , respectively. For example, the first color conversion part  252 , the second color conversion part  254 , and the third color conversion part  256  may be located in the openings of the partition wall  240 , respectively. 
     The first color conversion part  252  may overlap the first light emitting area LA 1 . The first color conversion part  252  may convert the incident light L 1  to the first transmitted light L 2 R having a red color. For example, the first color conversion part  252  may include a resin part  252   a , scattering particle  252   b , and wavelength conversion particle  252   c.    
     The scattering particle  252   b  may scatter the incident light L 1  without substantially changing the wavelength of the incident light. Therefore, a path of a light progressing in (e.g., progressing through) the first color conversion part  252  may be increased. The scattering particle  252   b  may include a metal oxide, an organic material, or the like. According to some embodiments, the scattering particle  252   b  may be omitted. 
     According to some embodiments, the wavelength conversion particle  252   c  may include a quantum dot. The quantum dot may be defined as a nano-crystalline semiconductor material. The quantum dot may absorb the incident light L 1  and emit a light having a wavelength different from a wavelength of the incident light. For example, the quantum dot may have a diameter (e.g., an average particle size) equal to or less than about 100 nm. According to some embodiments, the quantum dot may have a diameter of about 1 nm to about 20 nm. For example, each of the wavelength conversion particle  252   c  may include a quantum dot that is to absorb the incident light L 1  and emit red light. 
     The scattering particle  252   b  and the wavelength conversion particle  252   c  may be located in the resin part  252   a . For example, the resin part  252   a  may include an epoxy-based resin, an acryl-based resin, a phenol-based resin, a melamine-based resin, a cardo-based resin, an imide-based resin, or the like. 
     The first color conversion part  252  may convert the incident light L 1  to emit the first transmitted light L 2 R having a red color. A remainder of the incident light L 1 , which is not converted by the first color conversion part  252 , may be blocked by the red color filter  230 R. Accordingly, in the first light emitting area LA 1 , the first transmitted light L 2 R having a red color may be emitted to the outside (i.e., to the first direction D 1 ) passing through the second base substrate  210 . 
     The second color conversion part  254  may overlap the second light emitting area LA 2 . The second color conversion part  254  may convert the incident light L 1  to the second transmitted light L 2 G having a green color. For example, the second color conversion part  254  may include a resin part  254   a , scattering particle  254   b , and wavelength conversion particle  254   c . The resin part  254   a  and the scattering particle  254   b  of the second color conversion part  254  may be substantially the same as or similar to the resin part  252   a  and the scattering particle  252   b  of the first color conversion part  252 . 
     For example, the wavelength conversion particle  254   c  of the second color conversion part  254  may include a quantum dot that is to absorb the incident light L 1  and emit green light. Accordingly, the second color conversion part  254  may convert the incident light L 1  to emit the second transmitted light L 2 R having a green color. A remainder of the incident light L 1 , which is not converted by the second color conversion part  254 , may be blocked by the green color filter  230 G. Accordingly, in the second light emitting area LA 2 , the second transmitted light L 2 G having a green color may be emitted to the outside (i.e., to the first direction D 1 ) passing through the second base substrate  210 . 
     The third color conversion part  256  may overlap the third light emitting area LA 3 . The third color conversion part  256  may convert the incident light L 1  to the third transmitted light L 2 B having a blue color. For example, the third color conversion part  256  may include a resin part  256   a , scattering particle  256   b , and wavelength conversion particle  256   c . The resin part  256   a  and the scattering particle  256   b  of the third color conversion part  256  may be substantially the same as or similar to the resin part  252   a  and the scattering particle  252   b  of the first color conversion part  252 . 
     For example, the wavelength conversion particle  256   c  of the third color conversion part  256  may include a quantum dot that is to absorb the incident light L 1  and emit blue light. Accordingly, the third color conversion part  256  may convert the incident light L 1  to emit the third transmitted light L 2 B having a blue color. A remainder of the incident light L 1 , which is not converted by the third color conversion part  256 , may be blocked by the blue color filter  230 B. Accordingly, in the third light emitting area LA 3 , the third transmitted light L 2 B having a blue color may be emitted to the outside (i.e., to the first direction D 1 ) passing through the second base substrate  210 . 
     As the first to third transmitted lights L 2 R, L 2 G, and L 2 B emitted to the outside passing through the second base substrate  210  may be combined in the first to third light emitting areas LA 1 , LA 2 , and LA 3 , the image may be displayed in the display area DA. 
     The light blocking member  260  may be located in the peripheral area PA and the sealing area SA under the second base substrate  210 . For example, the light blocking member  260  may be located in the peripheral area PA and the sealing area SA under the second base substrate  210  to surround the display area DA in a plan view. The light blocking member  260  may prevent circuit structures such as wirings, a driving circuit, or the like located in the peripheral area PA of the first substrate  100  from being viewed from the outside of the display device  10 . In addition, the light blocking member  260  may prevent a light leakage in which a light reflected from the circuit structure or a light emitted from the display area DA passes through the peripheral area PA and the sealing area SA of the second base substrate  210  and is emitted in the front direction. 
     The light blocking member  260  may include a plurality of light blocking layers. The light blocking layers may overlap each other in the first direction D 1  and may extend in a second direction D 2  perpendicular to the first direction D 1 . For example, the light blocking member  260  may include a first light blocking layer  260 B, a second light blocking layer  260 R, and a third light blocking layer  260 G. According to some embodiments, the first light blocking layer  260 B may be a blue light blocking layer and the second light blocking layer  260 R may be a red light blocking layer and the third light blocking layer  260 G may be a green light blocking layer. As illustrated in  FIG.  3   , the first light blocking layer  260 B, the second light blocking layer  260 R, and the third light blocking layer  260 G may overlap each other in the first direction D 1 . Accordingly, the light blocking member  260  may effectively block a light progressing in the first direction D 1 . 
     According to some embodiments, the second substrate  200  may further include a low refractive index layer  270 , a first capping layer  280 , and a second capping layer  282 . 
     The low refractive index layer  270  may be located under the second base substrate  210  to surround the color filter layer  230  and the light blocking member  260 . According to some embodiments, the low refractive index layer  270  may have a smaller refractive index than the color conversion layer  250 . The low refractive index layer  270  may increase luminance and lifespan of the display device  10  by improving light extraction efficiency. 
     According to some embodiments, the low refractive index layer  270  may include hollow particles. The hollow particles may be dispersed in a resin matrix. The hollow particles may include an inorganic material. For example, the hollow particles may include silica (SiO2), magnesium fluoride (MgF2), iron oxide (Fe3O4), or the like. These can be used alone or in a combination thereof. The resin matrix may include an acrylic resin, a siloxane-based resin, a urethane-based resin, an imide-based resin, or the like, and may be selected in consideration of refractive index and fairness. 
     The first capping layer  280  may be located on the bottom surface of the low refractive index layer  270 . According to some embodiments, the first capping layer  280  may be entirely located in the display area DA, the peripheral area PA, and the sealing area SA. For example, the first capping layer  280  may include silicon oxide (SiOx), silicon nitride (SiNx), silicon oxynitride (SiOxNy), or the like. These can be used alone or in a combination thereof. 
     The second capping layer  282  may be located on the bottom surface of the first capping layer  280  in the peripheral area PA and the sealing area SA, and on the bottom surface of the color conversion layer  250  in the display area DA. That is, the second capping layer  282  may be entirely located in the display area DA, the peripheral area PA, and the sealing area SA. For example, the second capping layer  282  may be located under the second base substrate  210  to surround the partition wall  240 , the first color conversion part  252 , the second color conversion part  254 , the third color conversion part  256 , and the light blocking layer  260 . For example, the second capping layer  282  may include silicon oxide (SiOx), silicon nitride (SiNx), silicon oxynitride (SiOxNy), or the like. These can be used alone or in a combination thereof. 
       FIG.  4    is an enlarged cross-sectional view of another example of area ‘A’ of  FIG.  2   . 
     Referring to  FIG.  4   , the region ‘A’ according to some embodiments of the present invention may be substantially identical to region ‘A’ described above with reference to  FIG.  3    except for the region in which the low refractive index layer  270  and the first capping layer  280  are located. 
     Referring to  FIG.  4   , according to some embodiments, the low refractive index layer  270  may be located under the second base substrate  210  to surround the color conversion layer  250  and the light blocking member  260 . That is, the low refractive index layer  270  may be entirely located in the display area DA, the peripheral area PA, and the sealing area SA. For example, the low refractive index layer  270  may be located under the second base substrate  210  to cover the partition wall  240 , the first color conversion part  252 , the second color conversion part  254 , the third color conversion part  256 , and the light blocking layer  260 . In this case, the first capping layer  280  may be located on the bottom surface of the low refractive index layer  270 , and the second capping layer  282  may be omitted. 
     Referring to  FIGS.  1  to  4   , the second substrate  200  may include a column spacer  290 . 
     The column spacer  290  may be located on a bottom surface of the light blocking member  260 . According to some embodiments, when the low refractive index layer  270  is located on the bottom surface of the light blocking member  260 , the column spacer  290  may be located on the bottom surface of the low refractive index layer  270 . According to some embodiments, when the low refractive index layer  270  is located on the bottom surface of the light blocking member  260 , and at least one capping layer selected from the capping layer  280  and the second capping layer  282  is located on the bottom surface of the low refractive index layer  270  in the peripheral area PA and the sealing area SA, the column spacer  290  may be located on a bottom surface of the capping layer. 
     The column spacer  290  may minimize deformation by external pressure of the first substrate  100  and the second substrate  200  while bonding the first substrate  100  and the second substrate  200 . In addition, the column spacer  290  may maintain a gap between the first substrate  100  and the second substrate  200 . Accordingly, the column spacer may prevent or reduce the abnormal phenomenon occurring in an edge area of the display device  10  due to separation of layers or cracks occurring in the second substrate  200 . 
     According to some embodiments, the column spacer  290  may include a polymer resin. According to some embodiments, a pigment or a dye may be dispersed in the polymer resin. For example, at least a portion of the column spacer  290  may include a light blocking material such as a black pigment, a dye, or a carbon black. That is, the column spacer  290  may be black. 
     According to some embodiments, the column spacer  290  may extend in the second direction D 2  to be located in the peripheral area PA and the sealing area SA. That is, the column spacer  290  may overlap the sealing member  300  in the first direction D 1  in the sealing area SA. Accordingly, the column spacer  290  simultaneously supports the peripheral area PA and the sealing area SA to further minimize deformation of the first substrate  100  and the second substrate  200 . In addition, even if the thickness of the sealing member  300  in the first direction D 1  is not excessively increased, the column spacer  290  may support the sealing area SA, so that the deformation of the first substrate  100  and the second substrate  200  can be effectively prevented. Accordingly, the efficiency of the bonding process of the first substrate  100  and the second substrate  200  may be further improved. 
     According to some embodiments, as shown in  FIG.  3   , the column spacer  290  may extend in the second direction D 2  to expose a side of the column spacer  290  at the outermost edge of the sealing area SA. That is, the column spacer  290  may overlap the sealing member  300  in the first direction D 1  while contacting with the entire upper surface of the sealing member  300  in the sealing area SA. Accordingly, it is possible to effectively prevent a step difference between the second substrate  200  and the sealing member  300  in the sealing area SA, and the deformation of the first substrate  100  and the second substrate  200  due to external pressure may be further minimized. 
     In some embodiments, the second substrate  200  may include the light blocking member  260  and the column spacer  290 . The column spacer  290  may be located on the bottom surface of the low refractive index layer  270  or the bottom surface of the capping layer. Accordingly, while the first substrate  100  and the second substrate  200  are bonded through the sealing member  300 , the column spacer  290  may serve as a support for external pressure, so that the deformation of the first substrate  100  and the second substrate  200  may be minimized. In addition, the column spacer  290  may maintain the gap between the first substrate  100  and the second substrate  200 . Accordingly, the column spacer  290  may prevent or reduce the abnormal phenomenon occurring in the edge area of the display device  10 . 
       FIGS.  5  to  10    are cross-sectional views illustrating a method of manufacturing a color conversion substrate included in the display device of  FIG.  3   . 
     Hereinafter, a method of manufacturing the second substrate  200  included in the display device  10  of  FIG.  3    will be briefly described with reference to  FIGS.  5  to  10   . 
     First, referring to  FIG.  5   , the organic layer  220  may be formed in the display area DA on the second base substrate  210 . 
     Referring to  FIG.  6   , the blue color filter  230 B may be formed in the display area DA on the second base substrate  210 . The first light blocking layer  260 B may be formed in the peripheral area PA and the sealing area SA on the second base substrate  210 . The blue color filter  230 B may be formed to overlap the third light emitting area LA 3  and the light blocking area BA. The first light blocking layer  260 B may be formed to surround the display area DA. According to some embodiments, the blue color filter  230 B and the first light blocking layer  260 B may be substantially simultaneously formed with each other. 
     Referring to  FIG.  7   , the red color filter  230 R may be formed in the display area DA on the second base substrate  210 . The second light blocking layer  260 R may be formed in the peripheral area PA and the sealing area SA on the second base substrate  210 . The red color filter  230 R may be formed to overlap the first light emitting area LA 1  and the light blocking area BA. The second light blocking layer  260 R may be formed on the first blocking layer  260 B. According to some embodiments, the red color filter  230 R and the second light blocking layer  260 R may be substantially simultaneously formed with each other. 
     Referring to  FIG.  8   , the green color filter  230 G may be formed in the display area DA on the second base substrate  210 . The third light blocking layer  260 G may be formed in the peripheral area PA and the sealing area SA on the second base substrate  210 . The green color filter  230 G may be formed to overlap the second light emitting area LA 2  and the light blocking area BA. The third light blocking layer  260 G may be formed on the second blocking layer  260 R. According to some embodiments, the green color filter  230 G and the third light blocking layer  260 G may be substantially simultaneously formed with each other. 
     Referring to  FIG.  9   , the low refractive index layer  270  surrounding the color filter layer  230  and the light blocking layer  260  may be formed on the color filter layer  230  and the light blocking layer  260 . Subsequently, the first capping layer  280  covering the low refractive index layer  270  may be formed on the low refractive index layer  270 . Subsequently, the partition wall  240  may be formed in the display area DA on the first capping layer  280 . Subsequently, the openings respectively exposing the first to third light emitting areas LA 1 , LA 2 , and LA 3  may be formed in the partition wall  240 . The first color conversion part  252 , the second color conversion part  254 , and third color conversion  256  may be formed in the openings of the partition wall  240 , respectively. Subsequently, the second capping layer  282  covering the partition wall  240 , the first color conversion part  252 , the second color conversion part  254 , the third color conversion part  256 , the light blocking member  260  may be formed. 
     Referring to  FIG.  10   , the column spacer  290  may be formed in the peripheral PA and the sealing area SA on the second capping layer  282 . The column spacer  290  may maintain the gap between the first substrate  100  and the second substrate  200 . 
       FIGS.  11  to  12    are cross-sectional views illustrating display device according to some embodiments. 
     Referring  FIGS.  11  to  12   , the display device  20  according to some embodiments may be substantially the same as the display device  10  described above with reference to  FIG.  3   , except for the thickness of the sealing member  300 . 
     According to some embodiments, shown in  FIGS.  11  to  12   , a first gap H 1  between the first substrate  100  and the second substrate  200  in the sealing area SA may be smaller than a second gap H 2  between the first substrate  100  and the second substrate in the display area DA. When the thickness of the sealing member  300  in the first direction D 1  is relatively reduced, while the first substrate  100  and the second substrate  200  are bonded through the sealing member  300 , the first substrate  100  and the second substrate  200  may be slightly deformed by the external pressure. In this case, a difference between the first gap H 1  and the second gap H 2  may not increase because the column spacer  290  is located in the sealing area SA. Accordingly, the abnormal phenomenon occurring in the edge area of the display device  20  may be prevented and, at the same time, a margin for the thickness of the sealing member  300  may be secured. Accordingly, the efficiency of the bonding process of the first substrate  100  and the second substrate  200  may be further improved. 
       FIG.  13    is a cross-sectional view illustrating display device according to some embodiments. 
     Referring  FIG.  13   , the display device  30  according to some embodiments may be substantially the same as the display device  10  described above with reference to  FIG.  3   , except for the area of where the column spacer  290  is located. 
     According to some embodiments, the column spacer  290  may not be located in the sealing area SA but may extend in the second direction D 2  to be located in the peripheral area PA. That is, the column spacer  290  may be located only in the peripheral area PA and may not overlap the sealing member  300 . 
     In this case, the sealing member  300  may directly contact the light blocking member  260  in the sealing area SA. According to some embodiments, when the light blocking member  260  is surrounded by the low refractive index layer  270 , the sealing member  300  may directly contact the low refractive index layer  270 . According to some embodiments, when the light blocking member  260  is surrounded by the low refractive index layer  270  and the capping layer is located on the bottom surface of the low refractive index layer  270 , the sealing member  300  may directly contact the capping layer. 
     That is, the sealing member  300  may be arranged to surround the peripheral area PA. Accordingly, because the column spacer  290  is not located in the sealing area SA and only the sealing member  300  is exposed to the external environment, the moisture permeability reliability of the display device  30  may be further improved. Also, in this case, it may be required to maintain a relatively high thickness of the sealing member  300  in the first direction D 1  for compensating a step difference between the first substrate  100  and the second substrate  200 . 
       FIG.  14    is a cross-sectional view illustrating display device according to some embodiments. 
     Referring  FIG.  14   , the display device  40  according to some embodiments may be substantially the same as the display device  10  described above with reference to  FIG.  3   , except for a light transmitting part  258 . 
     According to some embodiments, in the display device  40 , all the lights generated from the plurality of pixels of the first substrate  100  and incident to the second substrate  200  may be an incident light L 1 B (hereinafter, blue light (L 1 B)). In this case, the color conversion layer  250  may include the first color conversion part  252 , the second color conversion part  254 , and the light transmitting part  258 . 
     The first color conversion part  252  may be substantially the same as the first color conversion part  252  described with reference to  FIG.  3   , and the second color conversion part  254  may be substantially the same as the second color conversion part  254  described with reference to  FIG.  3   . 
     The transmitting part  258  may overlap the third light emitting area LA 3 . For example, the light transmitting part  258  may include a resin part  258   a  and scattering particle  258   b . The resin part  258   a  and the scattering particle  258   b  of the light transmitting part  258  may be substantially the same as or similar to the resin part  252   a  and the scattering particle  252   b  of the first color conversion part  252 . 
     The light transmitting part  258  may not convert the blue light L 1 B. That is, the light transmitting part  258  may emit the third transmitted light L 2 B having substantially the same wavelength as that of the blue light L 1 B. Accordingly, in the third light emitting area LA 3 , the third transmitted light L 2 B having a blue color may be emitted to the outside (i.e., to the first direction D 1 ) passing through the second base substrate  210 . 
     The display device according to some embodiments may include the second substrate  200  including the light blocking member  260  and the column spacer  290  located on the bottom surface of the low refractive index layer  270 , or the capping layer. While the first substrate  100  and the second substrate  200  are bonded through the sealing member  300 , the column spacer  290  may minimize the deformation of the first substrate  100  and the second substrate  200 . In addition, the column spacer  290  may maintain the gap between the first substrate  100  and the second substrate  200 . Accordingly, the column spacer  290  may prevent or reduce the abnormal phenomenon occurring in the edge area of the display device. In addition, the column spacer  290  may be located in consideration of the thickness of the sealing member  300 , the step difference between the column spacer  290  and the sealing member  300 , or the like. Accordingly, the efficiency of the bonding process of the first substrate  100  and the second substrate  200  may be improved. 
     It should be understood that example embodiments described herein should be considered in a descriptive sense only and not for purposes of limitation. Descriptions of features or aspects within the example embodiments should typically be considered as available for other similar features or aspects in other embodiments. While one or more example embodiments have been described with reference to the figures, it will be understood by those of ordinary skill in the art that various changes in form and details may be made therein without departing from the spirit and scope as defined by the following claims and their equivalents.