Patent Publication Number: US-2023132725-A1

Title: Optical path control member and display device comprising the same

Description:
CROSS-REFERENCE TO RELATED APPLICATION 
     This application claims priority to and the benefit of Korean Patent Application No. 10-2021-0149836, filed on Nov. 3, 2021, the disclosure of which is incorporated herein by reference in its entirety. 
     TECHNICAL FIELD 
     Embodiments relate to an optical path control member, and to a display device including the same. 
     BACKGROUND 
     A light blocking film blocks transmitting of light from a light source, and is attached to a front surface of a display panel which is a display device used for a mobile phone, a notebook, a tablet PC, a vehicle navigation device, a vehicle touch, etc., so that the light blocking film adjusts a viewing angle of light according to an incident angle of light to express a clear image quality at a viewing angle needed by a user when the display transmits a screen. 
     In addition, the light blocking film may be used for the window of a vehicle, building or the like to shield outside light partially to inhibit glare, or to inhibit the inside from being visible from the outside. 
     That is, the light blocking film may be an optical path control member that controls the movement path of light to block light in a specific direction and transmit light in a specific direction. Accordingly, it is possible to control the viewing angle of the user by controlling a transmission angle of the light by the light blocking film. 
     Meanwhile, such a light blocking film may be divided into a light blocking film that can always control the viewing angle regardless of the surrounding environment or the user&#39;s environment and a switchable light blocking film that allow the user to turn on/off the viewing angle control according to the surrounding environment or the user&#39;s environment. 
     Such a switchable light blocking film may be implemented by switching a pattern part to a light transmitting part and a light blocking part by filling the inside of the pattern part with particles that may move when a voltage is applied and a dispersion liquid for dispersing the particles and by dispersing and aggregating the particles. 
     In this case, in order to apply a voltage to the light blocking film, an electrode of the switchable light blocking film and an external power source should be connected. Such a connection portion is an electrode connection portion that is not a region for controlling a viewing angle and may be defined as a bezel region in a display device. 
     Meanwhile, the light blocking film may have an adhesive layer disposed in some regions in order to bond a layer structure of the light blocking film. However, since the adhesive layer has a very low moisture permeability, moisture may permeate into the light blocking film through the adhesive layer, thereby deteriorating reliability of the light blocking film. For example, when moisture permeates into the light blocking film, an appearance defect may occur, and a dielectric constant of a region where moisture permeates and a region where moisture does not permeate among regions where a light conversion material is disposed is changed, so that a difference in driving speed in each region may occur. 
     Therefore, there is a need for an optical path control member having a new structure capable of solving the above problems. 
     SUMMARY 
     Technical Problem 
     An embodiment is directed to providing an optical path control member having improved reliability and driving characteristics by effectively blocking moisture that may be introduced thereinto through an adhesive layer. 
     Technical Solution 
     An optical path control member according to an embodiment includes: a first substrate on which a first direction and a second direction are defined; a first electrode disposed on the first substrate; a second substrate disposed on the first substrate and defining the first direction and the second direction; a second electrode disposed under the second substrate; a light conversion part disposed between the first electrode and the second electrode; an adhesive layer disposed between the first electrode and the light conversion part, and a cutting region formed by removing the second substrate, the second electrode, and the light conversion part, wherein the cutting region includes a first cutting region and a second cutting region that extend in a length direction of the first direction and are disposed to face each other in the second direction, the first cutting region and the second cutting region include a first region in which the adhesive layer is formed and a second region formed by partially or entirely removing the adhesive layer, and a first sealing part is disposed in the cutting region. 
     Advantageous Effects 
     An optical path control member according to an embodiment may be formed into two regions according to a degree to which a cutting region in which a sealing part is disposed is cut. 
     In detail, the cutting region may be formed with a first region where an adhesive layer is exposed and a second region including a stepped portion having a step difference from the first region. 
     The second region may be defined as a region in which the adhesive layer is partially or entirely removed. 
     Accordingly, when disposing the sealing part in the cutting region, the sealing part may also be disposed in the region from which the adhesive layer is removed. 
     Therefore, by reinforcing the adhesive layer vulnerable to moisture with the sealing part, it is possible to inhibit moisture from penetrating into the optical path control member through the adhesive layer from the outside. 
     Accordingly, it is possible to inhibit an appearance defect of the optical path control member and to inhibit a decrease in driving characteristics due to moisture penetration, so that the optical path control member according to the embodiment may have improved reliability and driving characteristics. 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
         FIG.  1    is a perspective view of an optical path control member according to an embodiment. 
         FIGS.  2  and  3    are cross-sectional views taken along line A-A′ of  FIG.  1   . 
         FIG.  4    is another cross-sectional view taken along line A-A′ of  FIG.  1   . 
         FIG.  5    is a top view of a first substrate of an optical path control member according to an embodiment. 
         FIG.  6    is a top view of a second substrate of the optical path control member according to the embodiment. 
         FIG.  7    is a top view in which the first substrate and the second substrate of the optical path control member according to the embodiment are laminated. 
         FIG.  8    is a top view of region A of  FIG.  1    for describing a first cutting region of the optical path control member according to the embodiment. 
         FIG.  9    is a cross-sectional view taken along line B-B′ of  FIGS.  1  and  8   . 
         FIG.  10    is a cross-sectional view taken along line C-C′ of  FIGS.  1  and  8   . 
         FIGS.  11  and  12    are cross-sectional views taken along line D-D′ of  FIG.  8   . 
         FIG.  13    is another top view of region A of  FIG.  1    for describing the first cutting region of the optical path control member according to the embodiment. 
         FIG.  14    is a cross-sectional view taken along line B-B′ of  FIGS.  1  and  13   . 
         FIG.  15    is still another top view of region A of  FIG.  1    for describing the first cutting region of the optical path control member according to the embodiment. 
         FIG.  16    is a cross-sectional view taken along line B-B′ of  FIGS.  1  and  15   . 
         FIG.  17    is a cross-sectional view taken along line E-E′ of  FIG.  15   . 
         FIG.  18    is a top view of region G of  FIG.  1    for describing second, fifth, and sixth cutting regions of the optical path control member according to the embodiment. 
         FIG.  19    is a cross-sectional view taken along line F-F′ of  FIGS.  1  and  18   . 
         FIG.  20    is a cross-sectional view taken along line G-G′ of  FIGS.  1  and  18   . 
         FIG.  21    is a cross-sectional view taken along line H-H′ of  FIG.  18   . 
         FIGS.  22  to  23    are cross-sectional views taken along line I-I′ of  FIG.  18     
         FIG.  24    is another top view of region G of  FIG.  1    for describing second, fifth, and sixth cutting regions of the optical path control member according to the embodiment. 
         FIG.  25    is a cross-sectional view taken along line F-F′ of  FIGS.  1  and  24   . 
         FIG.  26    is still another top view of region G of  FIG.  1    for describing second, fifth, and sixth cutting regions of the optical path control member according to the embodiment. 
         FIG.  27    is a cross-sectional view taken along line F-F′ of  FIGS.  1  and  26   . 
         FIG.  28    is a top view for describing a third cutting region and a fourth cutting region of the optical path control member according to the embodiment. 
         FIG.  29    is a cross-sectional view taken along line J-J′ of  FIG.  28   . 
         FIG.  30    is a view for describing various shapes of the cutting region of the optical path control member according to the embodiment. 
         FIG.  31    is a view for describing various pattern shapes of the cutting region of the optical path control member according to the embodiment. 
         FIGS.  32  to  38    are views for describing a method of manufacturing an optical path control member according to an embodiment. 
         FIGS.  39  and  40    are cross-sectional views of a display device to which an optical path control member according to an embodiment is applied. 
         FIGS.  41  to  43    are views for describing one embodiment of the display device to which the optical path control member according to the embodiment is applied. 
     
    
    
     DETAILED DESCRIPTION OF THE EMBODIMENTS 
     Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings. However, the spirit and scope of the present invention is not limited to a part of the embodiments described, and may be implemented in various other forms, and within the spirit and scope of the present invention, one or more of the elements of the embodiments may be selectively combined and replaced. 
     In addition, unless expressly otherwise defined and described, the terms used in the embodiments of the present invention (including technical and scientific terms) may be construed the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs, and the terms such as those defined in commonly used dictionaries may be interpreted as having a meaning that is consistent with their meaning in the context of the relevant art. 
     In addition, the terms used in the embodiments of the present invention are for describing the embodiments and are not intended to limit the present invention. In this specification, the singular forms may also include the plural forms unless specifically stated in the phrase, and may include at least one of all combinations that may be combined in A, B, and C when described in “at least one (or more) of A (and), B, and C”. 
     Further, in describing the elements of the embodiments of the present invention, the terms such as first, second, A, B, (a), and (b) may be used. These terms are only used to distinguish the elements from other elements, and the terms are not limited to the essence, order, or order of the elements. 
     In addition, when an element is described as being “connected”, or “coupled” to another element, it may include not only when the element is directly “connected” to, or “coupled” to other elements, but also when the element is “connected”, or “coupled” by another element between the element and other elements. 
     Further, when described as being formed or disposed “on (over)” or “under (below)” of each element, the “on (over)” or “under (below)” may include not only when two elements are directly connected to each other, but also when one or more other elements are formed or disposed between two elements. 
     Furthermore, when expressed as “on (over)” or “under (below)”, it may include not only the upper direction but also the lower direction based on one element. 
     Hereinafter, an optical path control member according to an embodiment will be described with reference to drawings. The optical path control member described below may be a switchable light blocking film driven in a share mode and a privacy mode according to application of power. 
     Meanwhile, for convenience of description, in the following drawings, it is illustrated that an inner surface of a cutting region is perpendicular to a bottom surface, but the embodiment is not limited thereto. That is, the inner surface of the cutting region may be formed to be inclined at an acute angle or an obtuse angle with respect to the bottom surface. 
     Referring to  FIGS.  1  to  7   , an optical path control member according to an embodiment may include a first substrate  110 , a second substrate  120 , a first electrode  210 , a second electrode  220 , and a light conversion part  300 . 
     Referring to  FIG.  1   , an optical path control member  1000  according to an embodiment may include a first substrate  110 , a second substrate  120 , a first electrode  210 , a second electrode  220 , and a light conversion part  300 . 
     The first substrate  110  and the second substrate  120  may be rigid or flexible. 
     In addition, the first substrate  110  and the second substrate  120  may be transparent. For example, the first substrate  110  and the second substrate  120  may include a transparent substrate capable of transmitting light. 
     The first substrate  110  and the second substrate  120  may include glass, plastic, or a flexible polymer film. For example, the flexible polymer film may be made of any one of polyethylene terephthalate (PET), polycarbonate (PC), acrylonitrile-butadiene-styrene copolymer (ABS), polymethyl methacrylate (PMMA), polyethylene naphthalate (PEN), polyether sulfone (PES), cyclic olefin copolymer (COC), triacetylcellulose (TAC) film, polyvinyl alcohol (PVA) film, polyimide (PI) film, and polystyrene (PS), which is only an example, but the embodiment is not limited thereto. 
     In addition, the first substrate  110  and the second substrate  120  may be a flexible substrate having flexible characteristics. 
     Further, the first substrate  110  and the second substrate  120  may be a curved or bended substrate. That is, the optical path control member including the first substrate  110  and the second substrate  120  may also be formed to have flexible, curved, or bent characteristics. Accordingly, the optical path control member according to the embodiment may be changed to various designs. 
     The first electrode  210  may be disposed on one surface of the first substrate  110 . In addition, the second electrode  220  may be disposed on one surface of the second substrate  120 . 
     The first electrode  210  and the second electrode  220  may include a transparent conductive material. For example, the first electrode  210  and the second electrode  220  may include a conductive material having a light transmittance of about 80% or more. As an example, the first electrode  210  and the second electrode  220  may include a metal oxide such as indium tin oxide, indium zinc oxide, copper oxide, tin oxide, zinc oxide, titanium oxide, etc. 
     The first electrode  210  and the second electrode  220  may have a thickness of about 10 nm to about 300 nm. 
     Alternatively, the first electrode  210  and the second electrode  220  may include various metals to realize low resistance. For example, the first electrode  210  and the second electrode  220  may include at least one metal of chromium (Cr), nickel (Ni), copper (Cu), aluminum (Al), silver (Ag), molybdenum (Mo). Gold (Au), titanium (Ti), and alloys thereof. 
     The first electrode  210  and the second electrode  220  may be disposed on an entire surface of one surface of the first substrate  110  and the second electrode  220 , respectively. In detail, the first electrode  210  may be disposed as a surface electrode on one surface of the first substrate  110 , and the second electrode  220  may be disposed as a surface electrode on one surface of the second substrate  120 . However, the embodiment is not limited thereto, and at least one of the first electrode  210  and the second electrode  220  may be formed of a plurality of pattern electrodes having a uniform pattern such as a mesh or stripe shape. 
     For example, at least one of the first electrode  210  and the second electrode  220  may include a plurality of conductive patterns. In detail, at least one of the first electrode  210  and the second electrode  220  may include a plurality of mesh lines crossing each other and a plurality of mesh openings formed by the mesh lines. 
     Accordingly, even though the first electrode  210  and the second electrode  220  include a metal, the first electrode  210  and the second electrode  220  are not visually recognized from the outside, so that visibility may be improved. In addition, the light transmittance is increased by the openings, so that the brightness of the optical path control member according to the embodiment may be improved. 
     The light conversion part  300  may be disposed between the first substrate  110  and the second substrate  120 . In detail, the light conversion part  300  may be disposed between the first electrode  210  and the second electrode  220 . 
     An adhesive layer  410  may be disposed between the light conversion part  300  and the first electrode  210 . The light conversion part and the first electrode  210  may be adhered through the adhesive layer  410 . 
     A buffer layer  420  may be disposed between the light conversion part  300  and the second electrode  220 . The buffer layer  420  may improve adhesion between the second electrode  220  and the light conversion part  300  which are a heterogeneous material. That is, the buffer layer  420  may be a primer layer disposed between the light conversion part  300  and the second electrode  220 . 
     The adhesive layer  410  and the buffer layer  420  may include a transparent material capable of transmitting light. As an example, the adhesive layer  420  may include an optically clear adhesive (OCA), and the buffer layer  410  may include a transparent resin. 
     The optical path control member may extend in a first direction  1 D, a second direction  2 D, and a third direction  3 D. That is, the substrate, the electrode, and the light conversion part constituting the optical path control member may extend in the first direction  1 D, the second direction  2 D, and the third direction  3 D, respectively. 
     In detail, the optical path control member may include the first direction  1 D corresponding to a length or width direction of the optical path control member, the second direction  2 D extending in a direction different from the first direction  1 D and corresponding to the length or the width direction of the optical path control member, and the third direction  3 D extending in a direction different from the first direction  1 D and the second direction  2 D and corresponding to a thickness direction of the optical path control member. 
     For example, the first direction  1 D may be defined as the length direction of the optical path control member, and the second direction  2 D may be defined as the width direction perpendicular to the first direction  1 D, and the third direction  3 D may be defined as the thickness direction of the optical path control member. Alternatively, the first direction  1 D may be defined as the width direction of the optical path control member, the second direction  2 D may be defined as the length direction of the optical path control member perpendicular to the first direction  1 D, and the third direction  3 D may be defined as the thickness direction of the optical path control member. 
     Hereinafter, for convenience of description, the first direction  1 D will be described in the length direction of the optical path control member, the second direction  2 D will be described in the width direction of the optical path control member, and the third direction  3 D will be described in the thickness direction of the optical path control member. 
       FIGS.  2  and  3    are views taken along line A-A′ of  FIG.  1   . 
     Referring to  FIGS.  2  and  3   , the light conversion part  300  may include a plurality of partition wall parts  310 , a plurality of reception parts  320 , and a base part  350 . 
     The light conversion part  300  may include the plurality of partition wall parts  310  and the reception part  320 , and the partition wall part  310  and the reception part  320  may be alternately disposed with each other. That is, one reception part  320  may be disposed between two adjacent partition wall parts  310 , and one partition wall part  310  may be disposed between two adjacent partition wall parts  320 . 
     The reception part  320  may be disposed to extend in one direction. For example, the reception part  320  may be disposed to be inclined at an angle within a range set with respect to the second direction. That is, the reception part  320  may be disposed to extend in a direction between the first direction  1 D and the second direction  2 D. 
     The base part  350  may be disposed above the reception part  320 . In detail, the base part  350  may be disposed between the reception part  320  and the buffer layer  420 . In more detail, the base part  350  may be disposed between an upper surface of the reception part  320  and a lower surface of the buffer layer  420 . Accordingly, the light conversion part  300  may be adhered to the second electrode  220  through the base part  350  and the buffer layer  420 . 
     In addition, the adhesive layer  410  may be disposed between the partition wall part  310  and the first electrode  210 , and the light conversion part  300  and the first electrode  210  may be adhered through the adhesive layer  410 . 
     The base part  350  is a region formed while releasing a resin material constituting the partition wall part  310  and the reception part  320  from a mold member in order to form the partition wall part  310  and the reception part  320  and may include the same material as that of the partition wall part  310 . That is, the base part  350  and the partition wall part  310  may be integrally formed. 
     The partition wall part  310  may transmit light. In addition, a light transmittance of the reception part  320  may be changed according to application of voltage. 
     In detail, a light conversion material  330  may be disposed in the reception part  320 . The reception part  320  may have a variable light transmittance by the light conversion material  330 . The light conversion material  330  may include light conversion particles  330   b  that move according to the application of voltage and a dispersion liquid  330   a  that disperses the light conversion particles  330   b.  In addition, the light conversion material  300  may further include a dispersant for inhibiting aggregation of the light conversion particles  330   b.    
     The light conversion particles  330   b  inside the dispersion liquid  330   a  may move according to the application of voltage. For example, referring to  FIG.  2   , surfaces of the light conversion particles  330   b  inside the dispersion liquid  330   a  is charged with a negative charge, and when a positive voltage is applied through at least one of the first electrode  210  and the second electrode  220 , the light conversion particles  330   b  are moved toward the first electrode  210  or the second electrode  220 , so that the reception part  320  may serve as a light transmitting part. 
     For example, when the first electrode  210  is in a positive voltage or a ground voltage state, and the second electrode  220  has a positive voltage or a positive voltage greater than that of the first electrode  210 , the light conversion particles  330   b  may move toward the second electrode  220  by attraction to aggregate. 
     Accordingly, the optical path control member may be driven in a share mode. 
     In addition, referring to  FIG.  3   , when a negative voltage is applied through at least one of the first electrode  210  and the second electrode  220 , the light conversion particles  330   b  may be dispersed back inside the dispersion liquid  330   a  by repulsion, and the reception part  320  may serve as a light blocking part. 
     Accordingly, the optical path control member may be driven in a privacy mode. 
     The optical path control member  1000  may include at least one cutting region. In detail, the optical path control member  1000  may include a plurality of cutting regions. 
     For example, the optical path control member  1000  may include a first cutting region CA 1 , a second cutting region CA 2 , a third cutting region CA 3 , a fourth cutting region CA 4 , a fifth cutting region CA 5 , and a sixth cutting region CA 6 . 
     The first cutting region CA 1  and the second cutting region CA 2  may be disposed to face each other. In detail, the first cutting region CA 1  and the second cutting region CA 2  may be disposed to face each other in the second direction  2 D. 
     That is, the first cutting region CA 1  and the second cutting region CA 2  may be disposed to face each other in the second direction while extending in the first direction. 
     In addition, the third cutting region CA 3  and the fourth cutting region CA 4  may be disposed to face each other. In detail, the third cutting region CA 3  and the fourth cutting region CA 4  may be disposed to face each other in the first direction  1 D. 
     That is, the third cutting region CA 3  and the fourth cutting region CA 4  may be disposed to face each other in the first direction while extending in the second direction. 
     In addition, the fifth cutting region CA 5  and the sixth cutting region CA 6  may be disposed under the second cutting region CA 2 . In detail, the fifth cutting region CA 5  and the sixth cutting region CA 6  may be disposed to face each other in the second direction  2 D. 
     That is, the fifth cutting region CA 5  and the sixth cutting region CA 6  may be disposed to face each other in the second direction while extending in the first direction. 
     In addition, the second cutting region CA 12  may be disposed between the first cutting region CA 1  and the fifth cutting region CA 5 . In addition, the fifth cutting region CA 5  may be disposed between the second cutting region CA 2  and the sixth cutting region CA 6 . That is, the first cutting region CA 1 , the second cutting region CA 2 , the fifth cutting region CA 5 , and the sixth cutting region CA 6  may be sequentially disposed based on the second direction  2 D. 
     The first cutting region CA 1 , the second cutting region CA 2 , the third cutting region CA 3 , the fourth cutting region CA 4 , the fifth cutting region CA 5 , and the sixth cutting region (CA 6 ) may be formed by cutting the second substrate  120 . In detail, the first cutting region CA 1 , the second cutting region CA 2 , the third cutting region CA 3 , the fourth cutting region CA 4 , the fifth cutting region CA 5 , and the sixth cutting region CA 6  may be formed by cutting at least one of the second substrate  120 , the second electrode  220 , the buffer layer  420 , the light conversion part  300 , the adhesive layer  410 , and the first electrode  210 . 
     A sealing material may be disposed in the first cutting region CA 1 , the second cutting region CA 2 , the third cutting region CA 3 , the fourth cutting region CA 4 , and the fifth cutting region CA 5 . Accordingly, the sealing material may be disposed in the first cutting region CA 1 , the second cutting region CA 2 , the third cutting region CA 3 , the fourth cutting region CA 4 , and the fifth cutting region CA 5  to form a sealing part  500 . 
     For example, a first sealing part  510  may be disposed in the first cutting region CA 1  and the second cutting region CA 2 , a second sealing part  520  may be disposed in the third cutting region CA 3  and the fourth cutting region CA 4 , and a third sealing part  530  may be formed in the fifth cutting region CA 5 . 
     Meanwhile, the first cutting region CA 1  may be formed at an edge of the optical path control member  1000 . Accordingly, one side surface of the optical path control member  1000  may become the first sealing part  510  disposed in the first cutting region CA 1 . 
     In addition, a conductive material may be disposed in the sixth cutting region CA 6 . Accordingly, the conductive material may be disposed in the sixth cutting region CA 6  to form a connection electrode. In detail, the conductive material may be disposed in the sixth cutting region CA 6  to form a second connection electrode CE 2  of the optical path control member  1000 . 
     In addition, a first connection electrode CE 1  formed by removing a part or a whole of the adhesive layer  410  may be formed on the first substrate  110 , and the first connection electrode CE 1  and the second connection electrode CE 2  may be connected to an external printed circuit board. 
     The first substrate  110  and the second substrate  120  may have the same size or different sizes. 
     In detail, a first length extending in the first direction  1 D of the first substrate  110  may have the same as or similar to a second length extending in the first direction  1 D of the second substrate  120 . 
     For example, the first length and the second length may have a size of  300  mm to  400  mm. 
     In addition, a first width extending in the second direction  2 D of the first substrate  110  may be the same as or similar to a second width extending in the second direction of the second substrate  120 . 
     For example, the first width and the second width may have a size of 150 mm to 200 mm. 
     In addition, a first thickness extending in the third direction  3 A of the first substrate  110  may be the same as or similar to a second thickness extending in the third direction of the second substrate  120 . 
     For example, the first thickness and the second thickness may have a size of 1 mm or less. 
     In addition, the first substrate  110  and the second substrate  120  may have different areas. 
     In detail, the first substrate  110  and the second substrate  120  may include protrusions. Referring to  FIGS.  5  to  7   , the first substrate  110  may include a first protrusion PA 1 , and the second substrate  120  may include a second protrusion PA 2 . In detail, the first substrate  110  and the second substrate  120  may include the first protrusion PA 1  and the second protrusion PA 2  that are disposed to be misaligned from each other. 
     That is, the first protrusion PA 1  and the second protrusion PA 2  may be disposed so as not to overlap each other in the third direction  3 A. 
     Alternatively, the embodiment is not limited thereto, and the first protrusion PA 1  and the second protrusion PA 2  may include an overlapping region that overlaps each other and a non-overlapping region that does not overlap each other. That is, the first protrusion PA 1  and the second protrusion PA 2  may include the overlapping region that overlaps each other and the non-overlapping region that does not overlap each other in the third direction. 
     In this case, the first protrusion PA 1  and the second protrusion PA 2  may have different areas. That is, the first substrate  110  and the second substrate  120  may have different sizes by a difference in size of the protrusions. 
     The connection electrode connected to an external printed circuit board or a flexible printed circuit board may be formed on the first protrusion PA 1  of the first substrate  110  and the second protrusion PA 2  of the second substrate  120 , respectively. 
     In detail, the first connection electrode CE 1  may be disposed on the first protrusion PA 1 , and the second connection electrode CE 2  may be disposed on the second protrusion PA 2 . When the first protrusion PA 1  and the second protrusion PA 2  are disposed at positions misaligned from each other, the first connection electrode CE 1  and the second connection electrode CE 2  may be disposed so as not to overlap in the third direction  3 A. 
     A conductive material may be respectively exposed on upper surfaces of the first connection electrode CE 1  and the second connection electrode CE 2 . For example, the first connection electrode CE 1  may be formed by partially removing the adhesive layer  410  on the first electrode  210 . Accordingly, the same conductive material as that of the first electrode  210  may be exposed on the first connection electrode CE 1 . 
     In addition, as described above, the second connection electrode CE 2  may be formed by disposing a conductive material inside the sixth cutting region CA 6 . Accordingly, a conductive material the same as or different from that of the second electrode  220  may be exposed on the second connection electrode CE 2 . 
     The optical path control member may be electrically connected to the external printed circuit board or the flexible printed circuit board through the first connection electrode CE 1  and the second connection electrode CE 2 . 
     For example, by disposing a pad part on the first connection electrode CE 1  and the second connection electrode CE 2  and by disposing a conductive adhesive including at least one of an anisotropic conductive film (ACF) and an anisotropic conductive paste (ACP) between the pad part and the printed circuit board or the flexible printed circuit board, the optical path control member may be connected thereto. 
     Alternatively, the conductive adhesive including at least one of the anisotropic conductive film (ACF) and the anisotropic conductive paste (ACP) may be disposed between the first connection electrode (CE 1 ), the second connection electrode (CE 2 ) and the printed circuit board or the flexible printed circuit board to be directly connected without the pad part. 
     Meanwhile, referring to  FIGS.  2  and  3   , the third cutting region CA 3  and the fourth cutting region CA 4  may be formed by removing the second substrate  120 , the second electrode  220 , the buffer layer  420 , the light conversion part  300 , and the adhesive layer  410 . Accordingly, the second sealing part  520  disposed in the third cutting region CA 3  and the fourth cutting region CA 4  may be disposed in contact with the first electrode  210 . 
     Alternatively, referring to  FIG.  4   , the third cutting region CA 3  and the fourth cutting region CA 4  may be formed by removing some or all of the second substrate  120 , the second electrode  220 , the buffer layer  420 , and the light conversion part  300 . Accordingly, the second sealing part  520  disposed in the third cutting region CA 3  and the fourth cutting region CA 4  may be disposed in contact with the light conversion part  300  or the adhesive layer  410 . 
     Meanwhile, in the configuration of the optical path control member  1000  according to the embodiment, the adhesive layer  410  is disposed to adhere the first electrode  210  and the light conversion part  300 . However, since a material forming the adhesive layer  410  has an external water vapor transmission rate smaller than those of other layers, moisture may be introduced from the outside toward the light conversion material of the optical path control member through the adhesive layer  410 . 
     Accordingly, an appearance defect of the optical path control member may occur, and a difference in driving characteristics may occur in a region of the light conversion material in which moisture has penetrated, thereby deteriorating driving characteristics of the optical path controlling member. 
     Therefore, the optical path control member capable of improving sealing characteristics of the adhesive layer of the optical path control member will be described in detail below. 
     First, referring to  FIGS.  8  to  17   , the first cutting region CA 1  in which the first sealing part  510  is disposed will be described. 
       FIGS.  8  to  17    are views for describing the first cutting region CA 1  and the first sealing part  510  disposed in the first cutting region CA 1 . 
       FIG.  8    is a top view for describing the first cutting region of the optical path control member  1000 . 
     Referring to  FIG.  8   , the first cutting region CA 1  may extend in the first direction  1 D. That is, a length direction of the first cutting region CA 1  may be the first direction. 
     The first cutting region CA 1  may be formed by partially removing the optical path control member  1000 . The first cutting region CA 1  may be formed by removing at least one of the second substrate  120 , the second electrode  220 , the buffer layer  420 , the light conversion part  300 , and the adhesive layer  410 . 
     In detail, the first cutting region CA 1  may be defined as two regions according to a degree of cutting. In detail, the first cutting region CA 1  may include a first region  1 A from which the second substrate  120 , the second electrode  220 , the buffer layer  420 , and the light conversion part  300  are removed and a second region  2 A from which the second substrate  120 , the second electrode  220 , the buffer layer  420 , the light conversion part  300 , and the adhesive layer  410 . 
     That is, the adhesive layer  410  may not be removed from the first region  1 A, and the adhesive layer  410  may be partially or completely removed from the second region  2 A. Accordingly, the adhesive layer  410  may be formed in the first region  1 A, and the second region  2 A may be formed by removing partially or entirely the adhesive layer  410 . 
     A cutting depth of the first region  1 A and the second region  2 A may be different. Accordingly, the first region  1 A and the second region  2 A may have different depths. Accordingly, the first cutting region CA 1  may include the first region  1 A to which the adhesive layer  410  is exposed and the second region  2 A including a step portion SA having a step difference from the first region. 
     For example, the adhesive layer  410  may be exposed in the first region  1 A, and the first electrode  210  may be exposed in the second region  2 A. That is, a lower surface of the first cutting region CA 1  may have a step difference in the first region  1 A and the second region  2 A. 
     The second region  2 A may be a region where a laser is irradiated in order to form the first cutting region CA 1 . That is, a part of the second substrate  120 , the second electrode  220 , the buffer layer  420 , the light conversion part  300 , and the adhesive layer  410  may be removed from the optical path control member  1000  by irradiating the laser along the second region  2 A. Accordingly, the first cutting region CA 1  may be formed in the optical path control member  1000 . 
       FIG.  9    is a cross-sectional view taken along line B-B′ of  FIGS.  1  and  8   ,  FIG.  10    is a cross-sectional view taken along line C-C′ of  FIGS.  1  and  8   , and  FIG.  11    is a cross-sectional view taken along line D-D′ of  FIG.  8   .  FIGS.  9  to  11    are cross-sectional views of a case in which the sealing part is filled in the first cutting region CA 1 . 
     Referring to  FIG.  9   , the first sealing part  510  disposed in the first region  1 A of the first cutting region CA 1  may be disposed in contact with the adhesive layer  410 . In addition, referring to  FIG.  10   , the first sealing part  510  disposed in the second region  2 A of the first cutting region CA 1  may be disposed in contact with the first electrode  210 . 
     That is, the first sealing part  510  may be disposed in contact with different layers according to a position in the first cutting region CA 1 . 
     Accordingly, referring to  FIG.  11   , when moisture is penetrated through the adhesive layer  410 , the moisture may move from the adhesive layer  410  toward the light conversion part  300  and then may be blocked by the first sealing part  510  disposed adjacent to the light conversion part  300 . 
     That is, it is possible to inhibit or minimize the movement of moisture penetrated through the adhesive layer  410  to the light conversion part  300  by the first sealing part  510 . 
     In detail, referring to  FIG.  11   , the first sealing part  510  disposed in the first cutting region CA 1  may include a step portion SA. The step portion SA may short-circuit the first adhesive layer  410 , and moisture penetration through the adhesive layer  410  may be easily inhibited by disposing the first sealing part  510  in the step portion SA. 
     Referring to  FIG.  11   , an inner surface of the first cutting region CA 1  may include an inclined surface. In addition, the inner surface of the first cutting region CA 1  may include a curved surface. That is, the inner surface of the first cutting region CA 1  may include an inclined surface including a curved surface. 
     A width of the first cutting region may increase while extending from the first substrate  110  toward the second substrate  120 . Here, the width of the first cutting region may extend in the second direction. That is, the inner surface of the first cutting region CA 1  may be inclined in a direction in which the width of the first cutting region CA 1  increases while extending from the first substrate  110  toward the second substrate  120 . 
     In addition, a side surface of the adhesive layer  410  among the inner surfaces of the first cutting region CA 1  may be formed in a concave shape. That is, the side surface of the adhesive layer  410  is a region in direct contact with the laser for forming the first cutting region CA 1 , and a large amount of heat according to the laser is applied compared to other layers, thereby forming the concave shape. 
     In addition, an inclination angle of the inner surface of the first cutting region CA 1  may be changed while extending from the first substrate  110  toward the second substrate  120 . For example, the inclination angle of the inner surface of the first cutting region CA 1  may be greater than an inclination angle in the first substrate  110 , and an inclination angle of the second electrode  220  and the buffer layer  420  may be greater than an inclination angle in the second substrate  120  or the light conversion part  300 . 
     In addition, referring to  FIG.  12   , a region where the first electrode  210  is exposed in the first cutting region CA 1  may be spaced apart from the inner surface of the first cutting region CA 1 . That is, unlike  FIG.  11   , the adhesive layer  410  may be disposed between the region where the first electrode  210  is exposed in the first cutting region CA 1  and the inner surface of the first cutting region. 
       FIG.  13    is another top view for describing the first cutting region of the optical path control member  1000 . 
     Referring to  FIG.  13   , the first cutting region CA 1  may be formed by removing at least one of the second substrate  120 , the second electrode  220 , the buffer layer  420 , the light conversion part  300 , and the adhesive layer  410 . 
     In detail, the first cutting region CA 1  may be defined as two regions according to the degree of cutting. In detail, the first cutting region CA 1  may include a first region  1 A from which the second substrate  120 , the second electrode  220 , the buffer layer  420 , and the light conversion part  300  are removed and a second region  2 A from which the second substrate  120 , the second electrode  220 , the buffer layer  420 , the light conversion part  300 , and the adhesive layer  410 . 
     That is, the adhesive layer  410  may be formed in the first region  1 A, and the second region  2 A may be formed by partially or entirely removing the adhesive layer  410 . 
     Accordingly, the adhesive layer  410  may be exposed in the first region  1 A, and the first electrode  210  may be exposed in the second region  2 A. That is, a lower surface of the first cutting region CA 1  may have a step difference in the first region  1 A and the second region  2 A. 
     The second region  2 A may also be formed at at least one of both ends of the first cutting region CA 1  in the first direction  1 D. For example, the second region  2 A may be formed at only one end of both ends of the first cutting region CA 1  in the first direction  1 D or may be formed at both ends of the first cutting region CA 1 . 
     Accordingly, when the first cutting region CA 1  is formed in the optical path control member  1000 , it may be easily cut by increasing a region to which the laser is irradiated. 
     As an example, the second region  2 A may be formed to extend in the second direction  2 D from both ends of the first cutting region CA 1  in the first direction  1 D. Accordingly, the second region  2 A may be disposed to surround the first region  1 A. 
       FIG.  14    is a cross-sectional view taken along line B-B′ of  FIGS.  1  and  11   .  FIG.  14    is a cross-sectional view of a case in which a sealing part is filled in the first cutting region CA 1 . 
     Referring to  FIGS.  13  and  14   , the first sealing part  510  disposed in the first region  1 A of the first cutting region CA 1  may be disposed in contact with the adhesive layer  410 . In addition, the first sealing part  510  disposed in the second region  2 A of the first cutting region CA 1  may be disposed in contact with the first electrode  210 . 
     That is, the first sealing part  510  may be disposed in contact with different layers according to a position in the first cutting region CA 1 . 
     Accordingly, referring to  FIGS.  13  and  14   , the adhesive layer  410  of an outer surface ES of the optical path control member  1000  is removed, and the first sealing part  510  is disposed in a region where the adhesive layer  410  is removed. Therefore, it is possible to inhibit or minimize penetration of moisture into the optical path controlling member through the adhesive layer on the outer surface of the optical path controlling member  1000 . 
       FIG.  15    is another top view for describing the first cutting region of the optical path control member  1000 . 
     Referring to  FIG.  15   , the first cutting region CA 1  may be formed by removing at least one of the second substrate  120 , the second electrode  220 , the buffer layer  420 , the light conversion part  300 , and the adhesive layer  410 . 
     That is, the laser may be irradiated to all regions where the first cutting region CA 1  is to be formed. 
     Therefore, since the first cutting region CA 1  is formed by removing all of the second substrate  120 , the second electrode  220 , the buffer layer  420 , the light conversion part  300 , and the adhesive layer  410 , the first electrode  210  may be exposed in the first cutting region CA 1 . That is, the first electrode  210  may be exposed on a lower surface of the first cutting region CA 1  without a step difference. 
       FIG.  16    is a cross-sectional view taken along line B-B′ of  FIGS.  1  and  15   ,  FIG.  17    is a cross-sectional view taken along line E-E′ of  FIG.  15   , and  FIGS.  16  and  17    are cross-sectional views of a case in which a sealing part is filled in the first cutting region CA 1 . 
     Referring to  FIGS.  16  and  17   , the first sealing part  510  disposed in the first cutting region CA 1  may be disposed in contact with the first electrode  210 . That is, all of the first sealing parts  510  disposed in the first cutting region CA 1  may be disposed in contact with the first electrode  210 . 
     Accordingly, referring to  FIGS.  16  and  17   , the outer surface ES of the optical path control member  1000  formed by the first cutting region CA 1  in the optical path control member  1000  may be formed by the first sealing part  510 . 
     Therefore, when moisture penetrates into the optical path control member through the outer surface of the optical path control member  1000 , it is possible to inhibit or minimize penetration of moisture into the optical path control member through the first sealing part  510 . 
     Meanwhile, the first sealing part  510  and the second sealing part  520 . may be connected in a region where the first cutting region CA 1 , the third cutting region CA 3 , and the fourth cutting region CA 4  overlap. That is, the first sealing part  510  and the second sealing part  520  may be integrally formed in the region where the first cutting region CA 1 , the third cutting region CA 3 , and the fourth cutting region CA 4  overlap. 
     The first sealing part  510  may include a photo-curable material. In addition, the sealing material of the first sealing part  510  may include a material having low reactivity with the light conversion material  330 . For example, the sealing material of the first sealing part  510  may include polyurethane acrylate. 
     The first sealing part  520  may seal the reception part  320  of the light converting part  300 . That is, while inhibiting the light conversion material  330  accommodated in the reception part  320  from leaking to the outside, it is possible to inhibit impurities that may permeate from the outside from penetrating into the light conversion part  300 . 
     That is, the first sealing part  520  may seal the light conversion material  300  by sealing the injection part of an injection part and a suction part of the reception part  320 . 
     The first sealing part  510  may be disposed while completely filling the first cutting region CA 1  or may be disposed in a height lower than a depth of the first cutting region CA 1 . Accordingly, an upper surface of the first sealing part  510  may be disposed in a height lower than an upper surface of the second substrate  120 . That is, a step difference may be formed between the upper surface of the first sealing part  510  and the upper surface of the second substrate  120 . In addition, the upper surface of the first sealing part  510  may be formed in a concave shape. 
     Hereinafter, the second cutting region CA 2 , the fifth cutting region CA 5 , and the sixth cutting region CA 6  will be described. 
       FIGS.  18  to  27    are views for describing the second cutting region CA 2 , the fifth cutting region CA 5 , the sixth cutting region CA 6 , the first sealing part  510  disposed in the second cutting region CA 2 , the third sealing part  530  disposed in the fifth cutting region CA 5 , and a conductive material  600  disposed in the sixth cutting region CA 6 . 
     Referring to  FIG.  18   , the second cutting region CA 2  may extend in a length direction of the first direction  1 D. 
     The second cutting region CA 2  may be formed by partially removing the optical path control member  1000 . The second cutting region CA 2  may be formed by removing at least one of the second substrate  120 , the second electrode  220 , the buffer layer  420 , the light conversion part  300 , and the adhesive layer  410 . 
     In detail, the second cutting region CA 2  may be defined as two regions according to the degree of cutting. In detail, the second cutting region CA 2  may include a first region  1 A from which the second substrate  120 , the second electrode  220 , the buffer layer  420 , and the light conversion part  300  are removed and a second region  2 A from which the second substrate  120 , the second electrode  220 , the buffer layer  420 , the light conversion part  300 , and the adhesive layer  410 . 
     A cutting depth of the first region  1 A and the second region  2 A may be different. Accordingly, the first region  1 A and the second region  2 A may have different depths. Accordingly, the first cutting region CA 1  may include the first region  1 A to which the adhesive layer  410  is exposed and the second region  2 A including a step portion SA having a step difference from the first region. 
     The second region  2 A may include a plurality of regions. For example, the second region  2 A may include a plurality of second regions  2 A spaced apart from each other. In addition, the first region  1 A may be disposed between the second regions  2 A. 
     Accordingly, the adhesive layer  410  may be exposed in the first region  1 A, and the first electrode  210  may be exposed in the second region  2 A. That is, a lower surface of the second cutting region CA 2  may have a step difference in the first region  1 A and the second region  2 A. 
     The second region  2 A may be a region where a laser is irradiated in order to form the first cutting region CA 1 . That is, a part of the second substrate  120 , the second electrode  220 , the buffer layer  420 , the light conversion part  300 , and the adhesive layer  410  may be removed from the optical path control member  1000  by irradiating the laser along the second region  2 A. Accordingly, the first cutting region CA 1  may be formed in the optical path control member  1000 . 
       FIG.  19    is a cross-sectional view taken along line F-F′ of  FIGS.  1  and  18   ,  FIG.  20    is a cross-sectional view taken along line G-G′ of  FIGS.  1  and  18   ,  FIG.  21    is a cross-sectional view taken along line H-H′ of  FIG.  18   , and  FIGS.  22  and  23    are cross-sectional views taken along line I-I′ of  FIG.  18   .  FIGS.  19  to  23    are cross-sectional views of a case in which a sealing part is filled in the second cutting region CA 2  and the fifth cutting region CA 5  and a conductive material is filled in the sixth cutting region CA 6 . 
     Referring to  FIG.  19   , the first sealing part  510  disposed in the first region  1 A of the second cutting region CA 2  may be disposed in contact with the adhesive layer  410 . In addition, referring to  FIG.  20   , the first sealing part  510  disposed in the second region  2 A of the second cutting region CA 2  may be disposed in contact with the first electrode  210 . 
     That is, the first sealing part  510  may be disposed in contact with different layers according to a position in the first cutting region CA 1 . 
     Accordingly, referring to  FIG.  21   , when moisture is penetrated through the adhesive layer  410 , it is possible to inhibit or minimize penetration of moisture into the light conversion part  300  by the first sealing part  510  disposed between the adhesive layers. 
     In addition, since the first sealing part  510  is disposed in all of the second regions  2 A spaced apart from each other, it is possible to double block the penetration of moisture. Therefore, when moisture is permeated into the optical path control member through the adhesive layer, it is possible to inhibit or minimize moisture from moving to the light conversion part  300 . 
       FIGS.  22  and  23    are cross-sectional views obtained by cutting the second cutting region, the fifth cutting region, and the sixth cutting region.  FIGS.  22  and  23    are cross-sectional views of a case in which a sealing part is filled in the second cutting region CA 2  and the fifth cutting region CA 5  and a conductive material is filled in the sixth cutting region CA 6 . 
     The fifth cutting region CA 5  may be disposed to be spaced apart in an opposite direction of the second cutting region CA 2  and the first cutting region CA 1  on the second cutting region CA 2 . 
     The fifth cutting region CA 5  may include a first region  1 A and a second region  2 A in the same manner as the second cutting region CA 2 . Accordingly, the third sealing part  530  disposed inside the fifth cutting region CA 5  may be disposed in contact with the adhesive layer  410  and the first electrode  210  inside the fifth cutting region CA 5 . 
     That is, the adhesive layer  410  may be formed in the first region  1 A, and the second region  2 A may be formed by partially or entirely removing the adhesive layer  410 . 
     A length of the fifth cutting region CA 5  in the first direction may be smaller than a length of the second cutting region CA 2 . In addition, the third sealing part  530  may include a material the same as or similar to that of the first sealing part  510 . 
     In addition, the conductive material  600  may be disposed in the sixth cutting region CA 6 . The sixth cutting region CA 6  may be a region where the above-described second connection electrode CE 2  is disposed. The conductive material  600  may include a metal paste. For example, the conductive material  600  may include a paste composition including a metal the same as or different from those of the first electrode  210  and the second electrode  220 . 
     A height of the sixth cutting region CA 6  may be different from a height of at least one of the first cutting region CA 1 , the second cutting region CA 2 , and the fifth cutting region CA 5 . For example, as shown in  FIGS.  22  and  23   , the height of the sixth cutting region CA 6  may be smaller than heights of the first cutting region CA 1 , the second cutting region CA 2 , and the fifth cutting region CA 5 . 
     Referring to  FIG.  23   , the second regions of the second cutting region CA 2  and the second region of the fifth cutting region CA 5  may have different depths. In detail, thicknesses of the adhesive layers  410  disposed in the second regions  2 A of the second cutting region CA 2  and the fifth cutting region CA 5  may be different. 
     In detail, the thicknesses of the adhesive layers  410  disposed in the second regions  2 A of the second cutting region CA 2  and the fifth cutting region CA 5  may vary depending on a distance from the first cutting region CA 1 . In more detail, the thicknesses of the adhesive layers  410  disposed in the second regions  2 A of the second cutting region CA 2  and the fifth cutting region CA 5  may be greater as it is closer to the first cutting region CA 1 . 
     That is, in the second region  2 A of the fifth cutting region CA 5 , all of the adhesive layer  410  may be removed by increasing an intensity or irradiation time of the laser, and in the second region  2 A of the second cutting region CA 2 , a part of the adhesive layer  410  may remain by making the intensity or irradiation time of the laser relatively small. 
     When the second cutting region CA 12  and the fifth cutting region CA 5  are formed using the laser, the first electrode  210  disposed under the adhesive layer  410  may be removed together due to an error during a process. 
     Therefore, in the second cutting region CA 2 , it is possible to inhibit the first electrode  210  from being removed by reducing the intensity or time of the laser to partially remain the adhesive layer  410 . Accordingly, by inhibiting the reception part of the light conversion part  300 , that is, the first electrode  210  of the second cutting region CA 2  disposed adjacent to the light conversion material  300  from being removed, it is possible to inhibit deterioration of the driving characteristics of the optical path control member. 
     In addition, in the fifth cutting region CA 5 , by removing all the adhesive layers by increasing the intensity or time of the laser, and by partially removing the first electrode  210  according to the intensity of the laser, it is possible to increase an area of the third sealing part  530 . Accordingly, it is possible to effectively inhibit the penetration of moisture that may penetrate from the outside of the optical path control member. In addition, since the fifth cutting region CA 5  is a region far from the light conversion material  300 , even though a part of the first electrode  210  is partially removed during a laser process, the driving characteristics may not be significantly affected. 
       FIGS.  24  and  25    are views for describing a second cutting region and a fifth cutting region of the optical path control member  1000 . 
     Referring to  FIG.  24   , the second cutting region CA 2  and the fifth cutting region CA 5  may be formed by removing at least one of the second substrate  120 , the second electrode  220 , the buffer layer  420 , the light conversion part  300 , and the adhesive layer  410 . 
     In detail, the second cutting region CA 2  and the fifth cutting region CA 5  may be defined as two regions according to the degree of cutting. In detail, the second cutting region CA 2  and the fifth cutting region CA 5  include a first region  1 A from which the second substrate  120 , the second electrode  220 , the buffer layer  420 , and the light conversion part  300  are removed and a second region  2 A from which the second substrate  120 , the second electrode  220 , the buffer layer  420 , the light conversion part  300 , and the adhesive layer  410 . 
     Accordingly, the adhesive layer  410  may be exposed in the first region  1 A, and the first electrode  210  may be exposed in the second region  2 A. That is, a lower surface of the second cutting region CA 2  may have a step difference in the first region  1 A and the second region  2 A. 
     The second region  2 A may also be formed at at least one of both ends of the second cutting region CA 2  and the fifth cutting region CA 5  in the first direction  1 D. For example, the second region  2 A may be formed at only one end of both ends of the second cutting region CA 2  in the first direction  1 D or may be formed at both ends of the second cutting region CA 2 . 
     Accordingly, when the second cutting region CA 2  and the fifth cutting region CA 5  are formed in the optical path control member  1000 , it may be easily cut by increasing the region to which the laser is irradiated. 
     As an example, the second region  2 A may be formed to extend in the second direction  2 D from both ends of the second cutting region CA 2  and the fifth cutting region CA 5  in the first direction  1 D. Accordingly, the second region  2 A may be disposed to surround the first region  1 A. 
       FIG.  25    is a cross-sectional view taken along line F-F′ of  FIGS.  1  and  24   .  FIG.  25    is a cross-sectional view of a case in which a sealing part is filled in the second cutting region CA 2  and the fifth cutting region CA 5  and a conductive material is filled in the sixth cutting region CA 6 . 
     Referring to  FIG.  25   , the first sealing part  510  disposed in the first region  1 A of the second cutting region CA 2  may be disposed in contact with the adhesive layer  410 . In addition, the first sealing part  510  disposed in the second region  2 A of the second cutting region CA 2  may be disposed in contact with the first electrode  210 . 
     That is, the first sealing part  510  may be disposed in contact with different layers according to a position in the second cutting region CA 2 . 
     Accordingly, referring to  FIG.  25   , the first sealing part  510  may be disposed in the region from which the adhesive layer  410  of the optical path control member  1000  is removed. Therefore, it is possible to inhibit or minimize penetration of moisture into the optical path controlling member through the adhesive layer of the optical path controlling member  1000 . 
       FIGS.  26  and  27    are still other views for describing a second cutting region and a fifth cutting region of the optical path control member  1000 . 
     Referring to  FIG.  26   , the second cutting region CA 2  and the fifth cutting region CA 5  may be formed by removing at least one of the second substrate  120 , the second electrode  220 , the buffer layer  420 , and the light conversion part  300 , and the adhesive layer  410 . In detail, the second cutting region CA 2  and the fifth cutting region CA 5  may be formed by removing the second substrate  120 , the second electrode  220 , the buffer layer  420 , the light conversion part  300 , and the adhesive layer  410 . 
     That is, the laser may be irradiated to all regions where the second cutting region CA 2  and the fifth cutting region CA 5  are to be formed. 
     Therefore, since the second cutting region CA 2  and the fifth cutting region CA 5  are formed by removing all of the second substrate  120 , the second electrode  220 , the buffer layer  420 , the light conversion part  300 , and the adhesive layer  410 , the first electrode  210  may be exposed in in the second cutting region CA 2  and the fifth cutting region CA 5 . That is, the first electrode  210  may be exposed on lower surfaces of the second cutting region CA 1  and the fifth cutting region CA 5  without a step difference. 
       FIG.  27    is a cross-sectional view taken along line F-F′ of  FIGS.  1  and  26   .  FIG.  27    is a cross-sectional view of a case in which a sealing part is filled in the second cutting region CA 2  and the fifth cutting region CA 5  and a conductive material is filled in the sixth cutting region CA 6 . 
     Referring to  FIG.  27   , the first sealing part  510  disposed in the second cutting region CA 2  may be disposed in contact with the first electrode  210 . That is, all of the first sealing parts  510  disposed in the first cutting region CA 1  may be disposed in contact with the first electrode  210 . 
     Accordingly, referring to  FIG.  27   , the outer surface ES of the optical path control member  1000  formed by the second cutting region CA 2  of the optical path control member  1000  may be formed by the first sealing part  510 . 
     Therefore, when moisture penetrates into the optical path control member through the outer surface of the optical path control member  1000 , it is possible to inhibit or minimize penetration of moisture into the optical path control member through the first sealing part  510 . 
     Hereinafter, a third cutting region, a fourth cutting region, and a second sealing part will be described with reference to  FIGS.  28  and  29   . 
     Referring to  FIG.  28   , the third cutting region CA 3  and the fourth cutting region CA 4  may extend in a width direction in the second direction  2 D. 
     The third cutting region CA 3  and the fourth cutting region CA 4  may be formed by partially removing the optical path control member  1000 . The third cutting region CA 3  and the fourth cutting region CA 4  may be formed by removing at least one of the second substrate  120 , the second electrode  220 , the buffer layer  420 , the light conversion part  300 , and the adhesive layer  410 . 
     In detail, the second substrate  120 , the second electrode  220 , the buffer layer  420 , the light conversion part  300 , and the adhesive layer  410  may be removed in the third cutting region CA 3  and the fourth cutting region CA 4 . 
     Accordingly, the first electrode  210  may be exposed in the third cutting region CA 3  and the fourth cutting region CA 4 . 
     Alternatively, a part of the second substrate  120 , the second electrode  220 , the buffer layer  420 , the light conversion part  300 , and the adhesive layer  410  may be removed in the third cutting region CA 3  and the fourth cutting region CA 4 . 
     Accordingly, the adhesive layer  410  from which a part is removed may be exposed in the third cutting region CA 3  and the fourth cutting region CA 4 . 
       FIG.  29    is a cross-sectional view taken along line J-J′ of  FIGS.  1  and  28   .  FIG.  30    is a cross-sectional view of a case in which a sealing part is filled in the third cutting region CA 3  and the fourth cutting region CA 4 . 
     Referring to  FIG.  29   , the second sealing part  520  disposed in the third cutting region CA 3  and the fourth cutting region CA 4  may be disposed in contact with the first electrode  210 . Alternatively, when the adhesive layer is partially removed as described above, the second sealing part  520  disposed in the third cutting region CA 3  and the fourth cutting region CA 4  may be disposed in contact with the adhesive layer  410 . 
     Accordingly, when moisture is penetrated through the adhesive layer  410 , the moisture may move from the adhesive layer  410  toward the light conversion part  300  and then may be blocked by the sealing part  520  disposed adjacent to the light conversion part  300 . 
     That is, it is possible to inhibit or minimize the movement of moisture penetrated through the adhesive layer  410  to the light conversion part  300  by the second sealing part  520 . 
     Meanwhile, in the foregoing description, it has been mainly described that the adhesive layer  410  is completely removed from the first to fifth cutting regions, but the embodiment is not limited thereto. 
     For example, referring to (a) of  FIG.  30   , the adhesive layer  410  may partially remain in the second region  2 A of the first cutting region CA 1 . In detail, the adhesive layer  410  may partially remain so that the second region  2 A of the first cutting region CA 1  has a thickness of 50% or less of a thickness of the first region  1 A. 
     Alternatively, referring to (b) of  FIG.  30   , the adhesive layer  410  may be completely removed in the second region  2 A of the first cutting region CA 1 , and the first electrode  210  may also be partially removed. In detail, the adhesive layer  410  may be partially removed together with the first electrode  210  so that the second region  2 A of the first cutting region CA 1  has a thickness of 50% to less than 100% of the thickness of the first electrode  210  of the first region  1 A. 
     Alternatively, referring to (c) of  FIG.  30   , the adhesive layer  410  and the first electrode  210  may be completely removed in the second region  2 A of the first cutting region CA 1 , and the first substrate  110  may also be partially removed. 
     Like the first cutting region, the adhesive layer may remain or the first electrode may be completely or partially removed in the second to fifth cutting regions. 
     In addition, in the foregoing description, the adhesive layer is removed from an edge of the cutting region or the adhesive layer is completely removed from the cutting region in the first to fifth cutting regions, but the embodiment is not limited thereto. 
     For example, referring to (a) of  FIG.  31   , three or more second regions  2 A of the first cutting region CA 1  may be formed. That is, at least three second regions extending in the same direction may be formed. 
     Alternatively, referring to (b) of  FIG.  31   , the second region  2 A of the first cutting region CA 1  may include a plurality of regions extending in different directions. For example, the second region  2 A of the first cutting region CA 1  may include a plurality of regions extending in a first direction, a second direction, and a direction between the first direction and the second direction. 
     That is, the second region having various pattern shapes may be formed in the first cutting region by adjusting a direction and intensity of the laser for forming the second region. 
     Like the first cutting regions, the second regions having various pattern shapes may be formed the second to fifth cutting regions. 
     Hereinafter, a method of manufacturing an optical path control member according to embodiments will be described with reference to  FIGS.  32  to  38   . In the description of the method of manufacturing the optical path controlling member according to the embodiments, descriptions the same as or similar to those of the optical path controlling member according to the above-described embodiments will be omitted, and the same reference numerals will be assigned to the same configurations. 
     Referring to  FIG.  32   , the first substrate  110  and the second substrate  120  may be adhered through an adhesive layer  410 . That is, the first substrate  110  and the second substrate  120  may be adhered to each other so that the second substrate  120  is disposed on the first substrate  110 . 
     Subsequently, a plurality of holes may be formed on the second substrate  120 . In detail, a first hole H 1 , a second hole H 2 , and a third hole H 3  may be formed on the second substrate  120 . 
     The first hole H 1  may include a 1-1 hole H 1 - 1  and a 1-2 hole H 1 - 2  that are disposed to be spaced apart from each other and face each other. In addition, the second hole H 2  may include a 2-1 hole H 2 - 1  and a 2-2 hole H 2 - 2  that are disposed to be spaced apart from each other and face each other. 
     The 1-1 hole H 1 - 1 , the 1-2 hole H 1 - 2 , the 2-1 hole H 2 - 1 , and the 2-2 hole H 2 - 2  may extend in a length direction of the first direction. 
     The 1-1 hole H 1 - 1  and the 1-2 hole H 1 - 2  may be disposed far from an edge of the second substrate  120  than the  2 - 1  hole H 2 - 1  and the 2-2 hole H 2 - 2 . 
     The 1-1 hole H 1 - 1 , the 1-2 hole H 1 - 2 , the 2-1 hole H 2 - 1 , and the 2-2 hole H 2 - 2  may be formed by removing the second substrate  120 , the second electrode  220 , the buffer layer  420 , the light conversion part  300 , and the adhesive layer  410 . In this case, the adhesive layer  410  may be completely removed or partially removed. 
     The 1-1 hole H 1 - 1  may correspond to the first cutting region CA 1  described above, and the 1-2 hole H 1 - 2  may correspond to the second cutting region CA 2  described above. The second hole H 1 - 1  may correspond to the fifth cutting region CA 5  described above. 
     In addition, the third hole H 3  may be formed in the protrusion PA of the second substrate  120 . The third hole H 3  may be formed by removing at least one of the second substrate  120 , the second electrode  220 , the buffer layer  420 , the light conversion part  300 , and the adhesive layer  410 . 
     The conductive material  600  described above is disposed in the third hole H 3 , and accordingly, the third hole H 3  may form a second connection electrode CE 2  connected to the second electrode  220 . 
     Subsequently, referring to  FIG.  33   , a sealing material may be filled into the second hole H 2 . Accordingly, a third sealing part  530  may be disposed inside the second hole H 2 . The third sealing part  530  may serve as a dam blocking the movement of the light conversion material when the light conversion material  330  is injected into the reception part  320 . 
     The third sealing part  530  may be partially or entirely filled to a region between the first hole H 1  and the second hole H 2  along the reception part  320 . 
     The third sealing part  530  may include polyurethane acrylate, but the embodiment is not limited thereto. 
     Referring to  FIG.  34   , the light conversion material  330  including the light conversion particles  330   a  and the dispersion liquid  330   b  may be injected into the reception part  320  through the first hole H 1 . Accordingly, the light conversion material  330  may be filled in the reception part  320 , the first hole H 1 , and the second hole H 2 . 
     The reception part  320  may be disposed to be tilted at a constant inclination angle with respect to the second direction  2 A, and accordingly, the light conversion material  330  may also be tilted at a constant inclination angle to be filled. 
     For example, after designating the 1-1 hole H 1 - 1  of one of the first holes H 1  facing each other as an injection part and designating the 1-2 hole H 1 - 2  as a suction part, dispensing the light conversion material inside the injection part, and then the light conversion material may be filled into the reception part  320  by a capillary method for sucking the light conversion material from the suction part. 
     Subsequently, referring to  FIG.  35   , the first sealing part  510  may be formed by filling the sealing material into the 1-1 hole H 1 - 1  and the 1-2 hole H 1 - 2 . 
     The first sealing part  510  may include the same material as the third sealing part  530 , but the embodiment is not limited thereto. 
     Meanwhile, the inside of the first hole H 1  is cleaned before filling the sealing material in order to easily fill the sealing material into the first hole H 1 , and a process for forming an injection passage of the sealing material (for example, a cleaning process) may be additionally performed. 
     Meanwhile, the first sealing part  510  may be partially moved into the reception part  320  while being disposed inside the first hole H 1 . Accordingly, the light conversion material  330  and the sealing material may be disposed together in the reception part  320 . 
     Subsequently, a fourth hole H 4  and a fifth hole H 5  may be additionally formed. In detail, the fourth hole H 4  and the fifth hole H 5  extending in the second direction may be formed on the second substrate  120 . That is, the fourth hole H 4  and the fifth hole H 5  may be formed by irradiating the laser from the second substrate  120  toward the first substrate  110 . 
     The fourth hole H 4  may include a 4-1 hole H 4 - 1  and a 4-2 hole H 4 - 2  that are disposed to be spaced apart from each other and face each other. In addition, the fifth hole H 5  may include a 5-1 hole H 5 - 1  and a 5-2 hole H 5 - 2  that are disposed to be spaced apart from each other and face each other. 
     The 4-1 hole H 4 - 1 , the 4-2 hole H 4 - 2 , the 5-1 hole H 5 - 1 , and the 5-2 hole H 5 - 2  may extend in a length direction of the second direction. 
     The 4-1 hole H 4 - 1  and the 4-2 hole H 4 - 2  may be disposed far from the edge of the second substrate  120  than the 5-1 hole H 5 - 1  and the 5-2 hole H 5 - 2 .  2 . 
     The 4-1 hole H 4 - 1 , the 4-2 hole H 4 - 2 , the 5-1 hole H 5 - 1 , and the 5-2 hole H 5 - 2  may be formed by removing the second substrate  120 , the second electrode  220 , the buffer layer  420 , the light conversion part  300 , and the adhesive layer  410 . In this case, the adhesive layer  410  may be completely removed or partially removed. 
     At least one of the fourth hole H 4  and the fifth hole H 5  may be disposed to overlap the first hole H 1  and the second hole H 2 . 
     The 4-1 hole H 4 - 1  may correspond to the third cutting region CA 3  described above, and the 4-2 hole H 4 - 2  may correspond to the fourth cutting region CA 4  described above. 
     Meanwhile, the 4-1 hole H 4 - 1 , the 4-2 hole H 4 - 2 , the 5-1 hole H 5 - 1 , and the 5-2 hole H 5 - 2  may be formed simultaneously with the first hole H 1  and the second hole H 2  described above. 
     Subsequently, referring to  FIG.  36   , a second sealing part  520  may be formed by disposing a sealing material inside the fourth hole H 4  and the fifth hole H 5 . 
     The second sealing part  520  may include the same material as the first sealing part  510  and the third sealing part  530  described above, but the embodiment is not limited thereto. 
     Subsequently, referring to  FIG.  37   , the optical path control member of  FIG.  38    may be finally manufactured by cutting in a dotted line direction of  FIG.  36   . 
     Hereinafter, referring to  FIGS.  39  to  40   , a display device to which an optical path control member according to an embodiment is applied will be described. 
     Referring to  FIGS.  39  to  40   , an optical path control member  1000  according to an embodiment may be disposed on or under a display panel  2000 . 
     The display panel  2000  and the optical path control member  1000  may be disposed to be adhered to each other. For example, the display panel  2000  and the optical path control member  1000  may be adhered to each other via an adhesive layer  1500 . The adhesive layer  1500  may be transparent. For example, the adhesive layer  1500  may include an adhesive or an adhesive layer including an optical transparent adhesive material. 
     The adhesive layer  1500  may include a release film. In detail, when adhering the optical path control member and the display panel, the optical path control member and the display panel may be adhered after the release film is removed. 
     The display panel  2000  may include a first base substrate  2100  and a second base substrate  2200 . When the display panel  2000  is a liquid crystal display panel, the optical path control member may be formed under the liquid crystal panel. That is, when a surface viewed by the user in the liquid crystal panel is defined as an upper portion of the liquid crystal panel, the optical path control member may be disposed under the liquid crystal panel. The display panel  2000  may be formed in a structure in which the first base substrate  2100  including a thin film transistor (TFT) and a pixel electrode and the second base substrate  2200  including color filter layers are adhered to each other with a liquid crystal layer interposed therebetween. 
     In addition, the display panel  2000  may be a liquid crystal display panel of a color filter on transistor (COT) structure in which a thin film transistor, a color filter, and a black electrolyte are formed at the first base substrate  2100  and the second base substrate  2200  is adhered to the first base substrate  2100  with the liquid crystal layer interposed therebetween. That is, a thin film transistor may be formed on the first base substrate  2100 , a protective film may be formed on the thin film transistor, and a color filter layer may be formed on the protective film. In addition, a pixel electrode in contact with the thin film transistor may be formed on the first base substrate  2100 . At this point, in order to improve an aperture ratio and simplify a masking process, the black electrolyte may be omitted, and a common electrode may be formed to function as the black electrolyte. 
     In addition, when the display panel  2000  is the liquid crystal display panel, the display device may further include a backlight unit  3000  providing light from a rear surface of the display panel  2000 . 
     That is, as shown in  FIG.  39   , the optical path control member may be disposed under the liquid crystal panel and on the backlight unit  3000 , and the optical path control member may be disposed between the backlight unit  3000  and the display panel  2000 . 
     Alternatively, as shown in  FIG.  40   , when the display panel  2000  is an organic light emitting diode panel, the optical path control member may be formed on the organic light emitting diode panel. That is, when the surface viewed by the user in the organic light emitting diode panel is defined as an upper portion of the organic light emitting diode panel, the optical path control member may be disposed on the organic light emitting diode panel. The display panel  2000  may include a self-luminous element that does not require a separate light source. In the display panel  2000 , a thin film transistor may be formed on the first base substrate  2100 , and an organic light emitting element in contact with the thin film transistor may be formed. The organic light emitting element may include an anode, a cathode, and an organic light emitting layer formed between the anode and the cathode. In addition, the second base substrate  2200  configured to function as an encapsulation substrate for encapsulation may be further included on the organic light emitting element. 
     In addition, although not shown in drawings, a polarizing plate may be further disposed between the optical path control member  1000  and the display panel  2000 . The polarizing plate may be a linear polarizing plate or an external light reflection preventive polarizing plate. For example, when the display panel  2000  is a liquid crystal display panel, the polarizing plate may be the linear polarizing plate. Further, when the display panel  2000  is the organic light emitting diode panel, the polarizing plate may be the external light reflection inhibiting polarizing plate. 
     In addition, an additional functional layer  1300  such as an anti-reflection layer, an anti-glare, or the like may be further disposed on the optical path control member  1000 . 
     Further, a touch panel may be further disposed between the display panel and the optical path control member. 
     It is shown in the drawings that the light conversion part of the optical path control member according to the embodiment is in a direction parallel or perpendicular to an outer surface of the second substrate, but the light conversion part is formed to be inclined at a predetermined angle from the outer surface of the second substrate. Through this, a moire phenomenon occurring between the display panel and the optical path control member may be reduced. 
     Referring to  FIGS.  41  to  43   , an optical path control member according to an embodiment may be applied to various display devices. 
     Referring to  FIGS.  41  to  43   , the optical path control member according to the embodiment may be applied to a display device that displays a display. 
     For example, when power is applied to the optical path control member as shown in  FIG.  41   , the reception part functions as the light transmitting part, so that the display device may be driven in the share mode, and when power is not applied to the optical path control member as shown in  FIG.  42   , the reception part functions as the light blocking part, so that the display device may be driven in the privacy mode. 
     Accordingly, a user may easily drive the display device in a privacy mode or a normal mode according to application of power. 
     Light emitted from the backlight unit or the self-luminous element may move from the first substrate toward the second substrate. Alternatively, the light emitted from the backlight unit or the self-luminous element may also move from the second substrate toward the first substrate. 
     In addition, referring to  FIG.  43   , the display device to which the optical path control member according to the embodiment is applied may also be applied inside a vehicle. 
     For example, the display device including the optical path control member according to the embodiment may display a video confirming information of the vehicle and a movement route of the vehicle. The display device may be disposed between a driver seat and a passenger seat of the vehicle. 
     In addition, the optical path control member according to the embodiment may be applied to a dashboard that displays a speed, an engine, an alarm signal, and the like of the vehicle. 
     Further, the optical path control member according to the embodiment may be applied to a front glass (FG) of the vehicle or right and left window glasses. 
     The characteristics, structures, effects, and the like described in the above-described embodiments are included in at least one embodiment of the present invention, but are not limited to only one embodiment. Furthermore, the characteristic, structure, and effect illustrated in each embodiment may be combined or modified for other embodiments by a person skilled in the art. Accordingly, it is to be understood that such combination and modification are included in the scope of the present invention. 
     In addition, embodiments are mostly described above, but the embodiments are merely examples and do not limit the present invention, and a person skilled in the art may appreciate that several variations and applications not presented above may be made without departing from the essential characteristic of embodiments. For example, each component specifically represented in the embodiments may be varied. In addition, it should be construed that differences related to such a variation and such an application are included in the scope of the present invention defined in the following claims.