Optical path control member and display device including the same

Abstract

An optical path control member according to an embodiment includes a first substrate having a first direction and a second direction defined therein, a first electrode disposed on the first substrate, a second substrate disposed on the first substrate and having the first and second directions defined therein, a second electrode disposed below the second substrate, and an optical conversion unit disposed between the first electrode and the second electrode, wherein the second substrate and the second electrode include cutting portions penetrating the second substrate and the second electrode, and the cutting portions include a 1-1 cutting portion and a 1-2 cutting portion disposed opposite each other in the second direction, and a 2-1 cutting portion and a 2-2 cutting portion disposed opposite each other in the first direction, and a first sealing portion is disposed on the 1-1 cutting portion and the 1-2 cutting portion, and a second sealing portion is disposed inside the 2-1 cutting portion and the 2-2 cutting portion.

Description

[Technical Field]

[0001] The embodiments relate to a light path control member and a display device including the same. [Background technology]

[0002] Light-blocking films block the transmission of light from a light source and are attached to the front of display panels, which are display devices used in mobile phones, laptops, tablet PCs, vehicle navigation systems, vehicle touchscreens, etc. When the display emits light, they adjust the viewing angle of light according to the angle of incidence of the light, allowing users to see clear image quality at the viewing angle they require.

[0003] Light-blocking films can also be used on windows of vehicles and buildings to block some of the external light to prevent glare or to prevent the interior from being seen from the outside.

[0004] That is, the light-blocking film can be a light path control component that controls the path of light by blocking light in a specific direction and transmitting light in a specific direction, thereby controlling the angle of light transmission and thereby controlling the user's viewing angle.

[0005] On the other hand, such light-blocking films can be divided into light-blocking films that can always control the viewing angle regardless of the surrounding environment or the user's environment, and switchable light-blocking films that allow the user to turn on and off viewing angle control depending on the surrounding environment or the user's environment.

[0006] Such a switchable light-blocking film can be realized by filling the inside of the container with particles that can move when a voltage is applied and a dispersion liquid that disperses the particles, and by dispersing and coagulating the particles, the container can be changed into a light-transmitting portion or a light-blocking portion.

[0007] That is, the switchable light-shielding film may include a plurality of containers filled with a dispersion liquid to change the path of light.

[0008] The inside of the container is filled with the viscous dispersion liquid as described above, which can lead to problems such as the dispersion liquid leaking out or impurities penetrating into the dispersion liquid during use of the switchable light-shielding film, thereby deteriorating the operating characteristics and reliability of the switchable light-shielding film.

[0009] Furthermore, when the switchable light-shielding film is combined with a display panel or the like to be used as a display device, a moire phenomenon may occur due to overlapping of a pattern of the switchable light-shielding film with a pattern of the display panel, resulting in a problem of reduced visibility due to the moire when a user uses the display device.

[0010] Therefore, there is a need for an optical path control element with a new structure that can solve the above problems. Summary of the Invention [Problem to be solved by the invention]

[0011] The embodiments relate to an optical path control member with improved visibility and reliability, and a display device including the same. [Means for solving the problem]

[0012] An optical path control member according to an embodiment includes a first substrate having a first direction and a second direction defined therein, a first electrode disposed on the first substrate, a second substrate disposed on the first substrate and having the first and second directions defined therein, a second electrode disposed below the second substrate, and an optical conversion unit disposed between the first electrode and the second electrode, wherein the second substrate and the second electrode include cutting portions penetrating the second substrate and the second electrode, and the cutting portions include a 1-1 cutting portion and a 1-2 cutting portion disposed opposite each other in the second direction, and a 2-1 cutting portion and a 2-2 cutting portion disposed opposite each other in the first direction, and a first sealing portion is disposed on the 1-1 cutting portion and the 1-2 cutting portion, and a second sealing portion is disposed inside the 2-1 cutting portion and the 2-2 cutting portion. [Effects of the Invention]

[0013] In the optical path controlling member according to the first embodiment, a cut portion may be formed on the second substrate, penetrating all or part of the second substrate, the second electrode, the buffer layer, and the optical conversion portion.

[0014] In addition, a first sealing portion and a second sealing portion may be disposed inside the cutting portion.

[0015] The first sealing portion and the second sealing portion are arranged to seal the inlet and outlet portions of the container that contains the light conversion material, and may be arranged to extend along the side area of the light conversion portion, i.e., the side area in the first direction.

[0016] As a result, the first sealing portion can prevent the light conversion material inside the accommodating portion from leaking out to the outside of the light conversion portion, and the first sealing portion and the second sealing portion can prevent impurities from penetrating into the inside of the light conversion portion from the outside, thereby improving the reliability of the light path control member.

[0017] Furthermore, since the first sealing portion and the second sealing portion are disposed inside the cut portion formed on the second substrate, the size of the optical path control member can be reduced compared to when the first sealing portion and the second sealing portion are formed outside the optical conversion portion, and the material of the sealing portion can be prevented from being altered by the external environment, thereby improving the sealing characteristics of the optical path control member.

[0018] In addition, in the light path controlling member according to the first embodiment, the first connecting electrode may be disposed on a first protrusion, and the second connecting electrode may be disposed on a second protrusion formed on the second substrate.

[0019] The first and second protrusions may protrude to an area sufficient to form the first and second connecting regions without protruding the entire surfaces of the first and second substrates.

[0020] In addition, since the optical path control member according to the first embodiment has the first connecting electrode and the second connecting electrode arranged on the same plane, the first connecting electrode and the second connecting electrode can be easily connected to a printed circuit board or the like.

[0021] This reduces the areas of the first and second protrusions, and therefore, when the light path control member is combined with a display panel or the like to be applied to a display device, other components of the display device can be disposed in areas not corresponding to the first and second protrusions, thereby reducing the bezel area of the display device.

[0022] That is, the light path control member according to the first embodiment reduces the size of the bezel area where the connecting electrodes are arranged, and thus the bezel area of the display device to which the light path control member is applied can also be reduced.

[0023] In the optical path control member according to the second embodiment, the receiving portion can be disposed so as to be inclined at an inclination angle of a certain size with respect to the second direction of the substrate.

[0024] This prevents the pattern of the accommodating portion of the optical path control member from overlapping with the pixel pattern of the display panel, thereby preventing the occurrence of moire, when the optical path control member and the display panel are combined to form a display device.

[0025] This makes it possible to prevent the pattern from being visible due to the moire phenomenon caused by the overlapping of the pattern of the housing portion of the light path control member and the pixel pattern of the display panel when a user views the display device from the outside.

[0026] Furthermore, in the light path controlling member according to the second embodiment, the container is disposed at an angle, thereby making it possible to prevent the light converting material from flowing out to the side surface of the light path controlling member.

[0027] That is, the first sealing portion and the second sealing portion are disposed at the ends of the light path control member in the first and second directions, thereby sealing the light conversion material inside the container, thereby minimizing the leakage of the light conversion material to the outside or the penetration of external impurities into the light conversion material.

[0028] Furthermore, by forming a region where the sealing part and the light conversion material are mixed, the adhesive property of the sealing part can be improved by an anchor effect, thereby improving the adhesion of the sealing part and preventing peeling, thereby improving the reliability and sealing property of the light path control member.

[0029] In the optical path control member according to the third embodiment, the first protrusion of the first substrate and the second protrusion of the second substrate can be arranged to be connected to each other.

[0030] This makes it possible to reduce alignment tolerances when bonding the first substrate and the second substrate together.

[0031] This makes it possible to prevent defects in the process of manufacturing the optical path control member, thereby improving process efficiency.

[0032] In addition, the electrode connecting portion disposed inside the third cutting portion, which is the second connecting region, is separated from the adhesive layer, and an insulating layer is disposed between the electrode connecting portion and the adhesive layer, thereby preventing the electrode connecting portion and the first electrode from being electrically connected due to the dielectric constant of the adhesive layer.

[0033] Therefore, the material of the adhesive layer can be freely selected, and electrical short circuits due to the dielectric constant of the adhesive layer can be prevented, thereby improving the driving characteristics and reliability of the optical path control member. [Brief explanation of the drawings]

[0034] [Figure 1] FIG. 1 is a diagram showing a perspective view of an optical path controlling member according to a first embodiment. [Figure 2] FIG. 2 is a top view of a first substrate of the optical path controlling member according to the first embodiment. [Figure 3] FIG. 2 is a diagram showing a top view of a second substrate of the optical path controlling member in accordance with the first embodiment. [Figure 4] FIG. 2 is a diagram showing a top view of a second substrate obtained by bonding together a first substrate and a second substrate of the optical path controlling member in the first embodiment. [Figure 5] FIG. 2 is a cross-sectional view taken along the line AA′ in FIG. 1. [Figure 6] FIG. 2 is a cross-sectional view taken along the line AA′ in FIG. 1. [Figure 7] FIG. 2 is a cross-sectional view taken along the line BB′ in FIG. 1. [Figure 8] FIG. 2 is a cross-sectional view taken along the CC' region of FIG. [Figure 9] FIG. 2 is a cross-sectional view taken along the line DD′ in FIG. 1. [Figure 10] FIG. 2 is a cross-sectional view taken along the line EE′ of FIG. 1. [Figure 11] FIG. 2 is a cross-sectional view taken along the line FF′ in FIG. 1. [Figure 12]FIG. 2 is a cross-sectional view taken along the line GG' in FIG. [Figure 13] FIG. 2 is a cross-sectional view taken along the line HH′ in FIG. 1. [Figure 14] FIG. 2 is a cross-sectional view taken along the line II' in FIG. [Figure 15] FIG. 10 is a perspective view of an optical path controlling member according to a second embodiment. [Figure 16] FIG. 10 is a top view of a first substrate of an optical path controlling component according to a second embodiment. [Figure 17] FIG. 10 is a diagram showing a top view of a second substrate of an optical path controlling member according to a second embodiment. [Figure 18] FIG. 10 is a diagram showing a top view of a second substrate obtained by bonding together a first substrate and a second substrate of an optical path controlling member according to a second embodiment. [Figure 19] FIG. 16 is a cross-sectional view taken along the line JJ′ in FIG. 15. [Figure 20] FIG. 16 is a cross-sectional view taken along the line KK' in FIG. [Figure 21] FIG. 16 is a cross-sectional view taken along the LL' region of FIG. [Figure 22] FIG. 19 is an enlarged view of region A in FIG. 18. [Figure 23] FIG. 19 is an enlarged view of region B in FIG. 18. [Figure 24] FIG. 19 is an enlarged view of region C in FIG. 18. [Figure 25] FIG. 19 is an enlarged view of region D in FIG. 18. [Figure 26] FIG. 10 is a perspective view of an optical path controlling member according to a third embodiment. [Figure 27] FIG. 11 is a top view of a first substrate of an optical path controlling member according to a third embodiment. [Figure 28] FIG. 11 is a diagram showing a top view of a second substrate of an optical path controlling member according to a third embodiment. [Figure 29] FIG. 11 is a diagram showing a top view of a second substrate obtained by bonding together a first substrate and a second substrate of an optical path controlling member according to a third embodiment. [Figure 30]FIG. 27 is a cross-sectional view taken along the line MM' in FIG. 26. [Figure 31] FIG. 10 is a diagram showing a perspective view of an optical path controlling member according to a fourth embodiment. [Figure 32] FIG. 10 is a top view of a second substrate of an optical path controlling member according to a fourth embodiment. [Figure 33] FIG. 11 is a diagram showing a top view of a second substrate obtained by bonding together a first substrate and a second substrate of an optical path controlling member according to a fourth embodiment. [Figure 34] FIG. 32 is a cross-sectional view taken along the OO′ region of FIG. 31. [Figure 35] FIG. 32 is a cross-sectional view taken along the OO′ region of FIG. 31. [Figure 36] FIG. 32 is a cross-sectional view taken along the PP′ region of FIG. 31. [Figure 37] FIG. 32 is a cross-sectional view taken along the QQ′ region of FIG. 31. [Figure 38] 32A-32C show various cross-sectional views taken along the R-R' region of FIG. 31. [Figure 39] 32A-32C show various cross-sectional views taken along the R-R' region of FIG. 31. [Figure 40] 32A-32C show various cross-sectional views taken along the R-R' region of FIG. 31. [Figure 41] 32A-32C show various cross-sectional views taken along the R-R' region of FIG. 31. [Figure 42] 32A-32C show various cross-sectional views taken along the R-R' region of FIG. 31. [Figure 43] FIG. 32 is a cross-sectional view taken along the line SS′ in FIG. 31. [Figure 44] FIG. 32 is a cross-sectional view taken along the line TT′ in FIG. 31. [Figure 45] 32 is a cross-sectional view taken along the UU' region of FIG. 31. FIG. [Figure 46] 1 is a diagram illustrating an optical path control module in which an optical path control member and a printed circuit board according to an embodiment are combined; [Figure 47]1A to 1C are diagrams for explaining a method for manufacturing an optical path controlling member according to an embodiment. [Figure 48] 1A to 1C are diagrams for explaining a method for manufacturing an optical path controlling member according to an embodiment. [Figure 49] 1A to 1C are diagrams for explaining a method for manufacturing an optical path controlling member according to an embodiment. [Figure 50] 1A to 1C are diagrams for explaining a method for manufacturing an optical path controlling member according to an embodiment. [Figure 51] 1A to 1C are diagrams for explaining a method for manufacturing an optical path controlling member according to an embodiment. [Figure 52] 1A to 1C are diagrams for explaining a method for manufacturing an optical path controlling member according to an embodiment. [Figure 53] 1A to 1C are diagrams for explaining a method for manufacturing an optical path controlling member according to an embodiment. [Figure 54] 1A to 1C are diagrams for explaining a method for manufacturing an optical path controlling member according to an embodiment. [Figure 55] 1A to 1C are diagrams for explaining a method for manufacturing an optical path controlling member according to an embodiment. [Figure 56] 1A to 1C are diagrams for explaining a method for manufacturing an optical path controlling member according to an embodiment. [Figure 57] 1A to 1C are diagrams for explaining a method for manufacturing an optical path controlling member according to an embodiment. [Figure 58] 1A to 1C are diagrams for explaining a method for manufacturing an optical path controlling member according to an embodiment. [Figure 59] 1A to 1C are diagrams for explaining a method for manufacturing an optical path controlling member according to an embodiment. [Figure 60] 1A to 1C are diagrams for explaining a method for manufacturing an optical path controlling member according to an embodiment. [Figure 61] 1A to 1C are diagrams for explaining a method for manufacturing an optical path controlling member according to an embodiment. [Figure 62] 1A to 1C are diagrams for explaining a method for manufacturing an optical path controlling member according to an embodiment. [Figure 63] 1A to 1C are diagrams for explaining a method for manufacturing an optical path controlling member according to an embodiment. [Figure 64] 1A to 1C are diagrams for explaining a method for manufacturing an optical path controlling member according to an embodiment. [Figure 65] FIG. 1 is a diagram showing a cross-sectional view of a display device to which an optical path controlling member according to an embodiment is applied. [Figure 66] FIG. 1 is a diagram showing a cross-sectional view of a display device to which an optical path controlling member according to an embodiment is applied. [Figure 67] 1 is a diagram illustrating an example of a display device to which a light path control member according to an embodiment is applied; [Figure 68] 1 is a diagram illustrating an example of a display device to which a light path control member according to an embodiment is applied; [Figure 69] 1 is a diagram illustrating an example of a display device to which a light path control member according to an embodiment is applied; DETAILED DESCRIPTION OF THE INVENTION

[0035] Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. However, the technical concept of the present invention is not limited to some of the described embodiments, and may be realized in various different forms. One or more of the components of the embodiments may be selectively combined or substituted within the scope of the technical concept of the present invention.

[0036] Furthermore, unless otherwise clearly defined and described, terms (including technical and scientific terms) used in the embodiments of the present invention may be interpreted in a way that would be commonly understood by a person of ordinary skill in the art to which the present invention belongs, and commonly used terms, such as dictionary-defined terms, may be interpreted in light of the contextual meaning of the relevant art.

[0037] Furthermore, terms used in the examples of the present invention are intended to explain the examples and are not intended to limit the present invention. In this specification, the singular can also include the plural unless otherwise specified in the context, and when it is described as "A and (and) at least one (or more) of B and C," it can include one or more of all possible combinations of A, B, and C.

[0038] Furthermore, in describing the components of the present invention, terms such as first, second, A, B, (a), (b), etc. are used only to distinguish the component from other components, and the terms do not limit the nature, order, or sequence of the corresponding components.

[0039] Furthermore, when a component is described as being "coupled," "coupled," or "connected" to another component, it can include not only cases where the component is directly coupled, coupled, or connected to the other component, but also cases where the component is "coupled," "coupled," or "connected" by another component between the component and the other component.

[0040] Furthermore, when it is described as being formed or disposed "above or below" each component, "above" or "below" includes not only the case where the two components are in direct contact with each other, but also the case where one or more other components are formed or disposed between the two components.

[0041] Furthermore, when it is expressed as "upper" or "lower," it can mean not only the upper direction but also the lower direction based on one component.

[0042] Hereinafter, an optical path control element according to an embodiment will be described with reference to the drawings. The optical path control element described below relates to a switchable optical path control element that is driven into various modes by electrophoretic particles that move when a voltage is applied.

[0043] An optical path controlling member according to a first embodiment will be described below with reference to FIGS.

[0044] 1 to 4, the optical path controlling member 1000 according to the first embodiment may include a first substrate 110, a second substrate 120, a first electrode 210, a second electrode 220, and an optical converting unit 300. In the example shown in FIG.

[0045] The first substrate 110 may support the first electrode 210. The first substrate 110 may be rigid or flexible.

[0046] The first substrate 110 may be transparent. For example, the first substrate 110 may include a transparent substrate that can transmit light.

[0047] The first substrate 110 may include glass, plastic, or a ductile polymer film. For example, the ductile 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), but these are merely examples and are not necessarily limited thereto.

[0048] In addition, the first substrate 110 may be a flexible substrate having flexibility.

[0049] In addition, the first substrate 110 may be a curved or bent substrate. That is, the optical path control member including the first substrate 110 may also be formed to have flexible, curved, or bent characteristics. As a result, the optical path control member according to the embodiment may be modified into various designs.

[0050] The first substrate 110 may extend in a first direction 1A, a second direction 2A, and a third direction 3A.

[0051] In detail, the first substrate 110 may include a first direction 1A corresponding to the longitudinal or width direction of the first substrate 110, a second direction 2A extending in a direction different from the first direction 1A and corresponding to the longitudinal or width direction of the first substrate 110, and a third direction 3A extending in a direction different from the first direction 1A and the second direction 2A and corresponding to the thickness direction of the first substrate 110.

[0052] For example, the first direction 1A may be defined as the length direction of the first substrate 110, the second direction 2A may be defined as the width direction of the first substrate 110 perpendicular to the first direction 1A, and the third direction 3A may be defined as the thickness direction of the first substrate 110. Alternatively, the first direction 1A may be defined as the width direction of the first substrate 110, the second direction 2A may be defined as the length direction of the first substrate 110 perpendicular to the first direction 1A, and the third direction 3A may be defined as the thickness direction of the first substrate 110.

[0053] In the following, for the sake of convenience, the first direction 1A will be referred to as the longitudinal direction of the first substrate 110, the second direction 2A as the width direction of the first substrate 110, and the third direction 3A as the thickness direction of the first substrate 110.

[0054] The first electrode 210 may be disposed on one surface of the first substrate 110. In particular, the first electrode 210 may be disposed on the upper surface of the first substrate 110. That is, the first electrode 210 may be disposed between the first substrate 110 and the second substrate 120.

[0055] The first electrode 210 may include a transparent conductive material. For example, the first electrode 210 may include a conductive material having a light transmittance of about 80% or more. For example, the first electrode 210 may include a metal oxide such as indium tin oxide, indium zinc oxide, copper oxide, tin oxide, zinc oxide, or titanium oxide.

[0056] The first electrode 210 may have a thickness of about 10 nm to about 300 nm.

[0057] Alternatively, the first electrode 210 may include various metals to achieve low resistance, such as at least one of chromium (Cr), nickel (Ni), copper (Cu), aluminum (Al), silver (Ag), molybdenum (Mo), gold (Au), titanium (Ti), and alloys thereof.

[0058] The first electrode 210 may be disposed on the entire surface of one surface of the first substrate 110. In particular, the first electrode 210 may be disposed as a surface electrode on one surface of the first substrate 110. However, embodiments are not limited thereto, and the first electrode 210 may be formed as a plurality of pattern electrodes having a certain pattern such as a mesh or stripe shape.

[0059] For example, the first electrode 210 may include a plurality of conductive patterns. Specifically, the first electrode 210 may include a plurality of mesh lines intersecting each other and a plurality of mesh openings formed by the mesh lines.

[0060] Therefore, even if the first electrode 210 includes a metal, the first electrode 210 is not visible from the outside, thereby improving visibility. In addition, the openings increase light transmittance, thereby improving brightness of the light path controlling member according to the embodiment.

[0061] The second substrate 120 may be disposed on the first substrate 110. In particular, the second substrate 120 may be disposed on the first electrode 210 on the first substrate 110.

[0062] The second substrate 120 may include a material that can transmit light, a transparent material, or the same or similar material as the first substrate 110 described above.

[0063] For example, the second substrate 120 may include glass, plastic, or a ductile polymer film. For example, the ductile 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). These are merely examples and are not necessarily limited thereto.

[0064] Also, the second substrate 120 may be a flexible substrate having flexibility.

[0065] In addition, the second substrate 120 may be a curved or bent substrate. That is, the optical path control member including the second substrate 120 may also be formed to have flexible, curved, or bent characteristics. As a result, the optical path control member according to the embodiment may be modified into various designs.

[0066] Similar to the first substrate 110, the second substrate 120 may extend in a first direction 1A, a second direction 2A, and a third direction 3A.

[0067] In detail, the second substrate 120 may include a first direction 1A corresponding to the longitudinal direction or width direction of the second substrate 120, a second direction 2A extending in a direction different from the first direction 1A and corresponding to the longitudinal direction or width direction of the second substrate 120, and a third direction 3A extending in a direction different from the first direction 1A and the second direction 2A and corresponding to the thickness direction of the second substrate 120.

[0068] For example, the first direction 1A can be defined as the longitudinal direction of the second substrate 120, the second direction 2A can be defined as the width direction of the second substrate 120 perpendicular to the first direction 1A, and the third direction 3A can be defined as the thickness direction of the second substrate 120.

[0069] Alternatively, the first direction 1A may be defined as the width direction of the second substrate 120, the second direction 2A may be defined as the length direction of the second substrate 120 perpendicular to the first direction 1A, and the third direction 3A may be defined as the thickness direction of the second substrate 120.

[0070] In the following, for convenience of explanation, the first direction 1A will be described as the longitudinal direction of the second substrate 120, the second direction 2A as the width direction of the second substrate 120, and the third direction 3A as the thickness direction of the second substrate 120.

[0071] The second electrode 220 may be disposed on one surface of the second substrate 120. In particular, the second electrode 220 may be disposed on the lower surface of the second substrate 120. That is, the second electrode 220 may be disposed on a surface of the second substrate 120 where the second substrate 120 faces the first substrate 110. That is, the second electrode 220 may be disposed opposite the first electrode 210 on the first substrate 110. That is, the second electrode 220 may be disposed between the first electrode 210 and the second substrate 120.

[0072] The second substrate 120 may include the same or similar material as the first substrate 110 described above.

[0073] The second electrode 220 may include a transparent conductive material. For example, the second electrode 220 may include a conductive material having a light transmittance of about 80% or more. For example, the first electrode 210 may include a metal oxide such as indium tin oxide, indium zinc oxide, copper oxide, tin oxide, zinc oxide, or titanium oxide.

[0074] The second electrode 220 may have a thickness of about 10 nm to about 300 nm.

[0075] Alternatively, the second electrode 220 may include various metals to achieve low resistance, such as at least one of chromium (Cr), nickel (Ni), copper (Cu), aluminum (Al), silver (Ag), molybdenum (Mo), gold (Au), titanium (Ti), and alloys thereof.

[0076] The second electrode 220 may be disposed on the entire surface of one side of the second substrate 120. However, the embodiment is not limited thereto, and the second electrode 220 may be formed as a plurality of pattern electrodes having a certain pattern such as a mesh or stripe shape.

[0077] For example, the second electrode 220 may include a plurality of conductive patterns. Specifically, the second electrode 220 may include a plurality of mesh lines intersecting each other and a plurality of mesh openings formed by the mesh lines.

[0078] Therefore, even if the second electrode 220 includes a metal, the second electrode 220 is not visible from the outside, thereby improving visibility. In addition, the openings increase light transmittance, thereby improving brightness of the light path controlling member according to the embodiment.

[0079] Cut portions may be formed in the second substrate 120. In particular, the second substrate 120 may include a plurality of cut portions.

[0080] Referring to FIG. 1, the second substrate 120 may include a 1-1 cut portion h1-1, a 1-2 cut portion h1-2, a 2-1 cut portion h2-1, and a 2-2 cut portion h2-2.

[0081] The 1-1 cut portion h1-1, the 1-2 cut portion h1-2, the 2-1 cut portion h2-1, and the 2-2 cut portion h2-2 may be formed in a hole shape or a groove shape.

[0082] For example, at least one of the 1-1 cut portion h1-1, the 1-2 cut portion h1-2, the 2-1 cut portion h2-1, and the 2-2 cut portion h2-2 may be formed in a groove shape with one end open, which is the upper surface of the second substrate, and the other end closed, which is the lower surface of the optical conversion unit. Also, at least one of the 1-1 cut portion h1-1, the 1-2 cut portion h1-2, the 2-1 cut portion h2-1, and the 2-2 cut portion h2-2 may be groove-shaped with one end open, which is the upper surface of the second substrate, and the other end open or closed, which is the lower surface of the optical conversion unit, and either one of both sides perpendicular to the longitudinal direction of the cut portion.

[0083] In detail, the 1-1 cut portion h1-1, the 2-1 cut portion h2-1, and the 2-2 cut portion h2-2 may be disposed inside the second substrate 120. As a result, the 1-1 cut portion h1-1, the 2-1 cut portion h2-1, and the 2-2 cut portion h2-2 may be formed in a groove shape with one end, which is the upper surface of the second substrate, being open and the other end, which is the lower surface of the optical conversion portion, being closed.

[0084] The first-second cut portion h1-2 may be disposed on the upper surface and one side surface of the second substrate, and may be formed in a groove shape with one end open at the upper surface of the second substrate, the other end closed at the lower surface of the optical conversion portion, and one side open in a direction perpendicular to the longitudinal direction of the cut portion.

[0085] At least one of the 1-1 cutting portion h1-1, the 1-2 cutting portion h1-2, the 2-1 cutting portion h2-1, and the 2-2 cutting portion h2-2 may be formed in a shape in which the long width and / or short width narrows as it extends from the second substrate 120 toward the first substrate 110.

[0086] The 1-1 cut portion h1-1 and the 1-2 cut portion h1-2 may be disposed opposite to each other. In particular, the 1-1 cut portion h1-1 and the 1-2 cut portion h1-2 may extend in the first direction 1A of the second substrate 120, and the 1-1 cut portion h1-1 and the 1-2 cut portion h1-2 may be disposed opposite to each other. That is, the 1-1 cut portion h1-1 and the 1-2 cut portion h1-2 may extend in the longitudinal direction of the second substrate 120, and the 1-1 cut portion h1-1 and the 1-2 cut portion h1-2 may be disposed opposite to each other.

[0087] The 1-1 cut portion h1-1 and the 1-2 cut portion h1-2 may have the same shape and area, or the 1-1 cut portion h1-1 and the 1-2 cut portion h1-2 may have different shapes and / or areas.

[0088] At least one of the first cut portion h1-1 and the first cut portion h1-2 may be spaced apart from or in contact with both ends of the second substrate 120.

[0089] The 2-1 cut portion h2-1 and the 2-2 cut portion h2-2 may be disposed opposite to each other. In particular, the 2-1 cut portion h2-1 and the 2-2 cut portion h2-2 may extend in the second direction 2A of the second substrate 120, and the 2-1 cut portion h2-1 and the 2-2 cut portion h2-2 may be disposed opposite to each other. That is, the 2-1 cut portion h2-1 and the 2-2 cut portion h2-2 may extend in the width direction of the second substrate 120, and the 2-1 cut portion h2-1 and the 2-2 cut portion h2-2 may be disposed opposite to each other.

[0090] The 2-1 cut portion h2-1 and the 2-2 cut portion h2-2 may have the same shape and area, or the 2-1 cut portion h2-1 and the 2-2 cut portion h2-2 may have different shapes and / or areas.

[0091] At least one of the 2-1 cut portion h2-1 and the 2-2 cut portion h2-2 may be disposed apart from or in contact with both ends of the second substrate 120.

[0092] Therefore, the 1-1 cut portion h1-1, the 1-2 cut portion h1-2, the 2-1 cut portion h2-1, and the 2-2 cut portion h2-2 may be disposed to extend along the edge of the second substrate 120.

[0093] At least two cut portions among the 1-1 cut portion h1-1, the 1-2 cut portion h1-2, the 2-1 cut portion h2-1, and the 2-2 cut portion h2-2 may be connected to each other. Also, at least two cut portions among the 1-1 cut portion h1-1, the 1-2 cut portion h1-2, the 2-1 cut portion h2-1, and the 2-2 cut portion h2-2 may be spaced apart from each other.

[0094] 1, the 1-1 cut portion h1-1 may be connected to the 2-1 cut portion h2-1 and the 2-2 cut portion h2-2, the 1-2 cut portion h1-2 may be connected to the 2-1 cut portion h2-1, the 2-1 cut portion h2-1 may be connected to the 1-1 cut portion h1-1 and the 1-2 cut portion h1-2, and the 2-2 cut portion h2-2 may be connected to the 1-1 cut portion h1-1. Thus, the 1-2 cut portion h1-2 and the 2-2 cut portion h2-2 may be spaced apart from each other.

[0095] As a result, an open area OA may be formed on the second substrate 120 between the first-2 cutting portion h1-2 and the second-2 cutting portion h2-2.

[0096] The current and voltage applied to the electrode connecting part 700 of the second connecting area CA2 by the open area OA can be transmitted to the receiving part 320 of the optical conversion part 300 via the second electrode 220.

[0097] Meanwhile, at least one of the 1-1 cut portion h1-1, the 1-2 cut portion h1-2, the 2-1 cut portion h2-1, and the 2-2 cut portion h2-2 may be formed on the second substrate 120. That is, the 1-1 cut portion h1-1, the 1-2 cut portion h1-2, the 2-1 cut portion h2-1, and the 2-2 cut portion h2-2 may all be formed on the second substrate 120, or some of the 1-1 cut portion h1-1, the 1-2 cut portion h1-2, the 2-1 cut portion h2-1, and the 2-2 cut portion h2-2 may be omitted and only at least one cut portion may be formed. The number of cut portions may vary depending on the manufacturing process of the light path controlling member.

[0098] The 1-1 cut portion h1-1, the 1-2 cut portion h1-2, the 2-1 cut portion h2-1, and the 2-2 cut portion h2-2 may be formed to penetrate the second substrate 120. In addition, the 1-1 cut portion h1-1, the 1-2 cut portion h1-2, the 2-1 cut portion h2-1, and the 2-2 cut portion h2-2 may be formed to penetrate at least one of the second substrate 120, the light conversion unit 300, and the second electrode 220.

[0099] The penetration depths of the 1-1 cut portion h1-1, the 1-2 cut portion h1-2, the 2-1 cut portion h2-1, and the 2-2 cut portion h2-2 may be the same, or at least one of the 1-1 cut portion h1-1, the 1-2 cut portion h1-2, the 2-1 cut portion h2-1, and the 2-2 cut portion h2-2 may have a different depth from the other cut portions.

[0100] The penetration depths of the 1-1 cut portion h1-1, the 1-2 cut portion h1-2, the 2-1 cut portion h2-1, and the 2-2 cut portion h2-2 will be described in detail below.

[0101] In addition, a sealing material may be disposed in the 1-1 cut portion h1-1, the 1-2 cut portion h1-2, the 2-1 cut portion h2-1, and the 2-2 cut portion h2-2, so that a sealing portion 500 may be formed inside the 1-1 cut portion h1-1, the 1-2 cut portion h1-2, the 2-1 cut portion h2-1, and the 2-2 cut portion h2-2.

[0102] That is, a first sealing portion 510 may be disposed at the 1-1 cut portion h1-1 and the 1-2 cut portion h1-2, and a second sealing portion 520 may be disposed at the 2-1 cut portion h2-1 and the 2-2 cut portion h2-2.

[0103] That is, the 1-1 sealing portion may be disposed at the 1-1 cutting portion h1-1, the 1-2 sealing portion may be disposed at the 1-2 cutting portion h1-2, the 2-1 sealing portion may be disposed at the 2-1 cutting portion h2-1, and the 2-2 sealing portion may be disposed at the 2-2 cutting portion h2-2.

[0104] Meanwhile, in order to minimize the bezel area of the optical path control member, at least one of the 1-1 cutting portion h1-1, the 1-2 cutting portion h1-2, the 2-1 cutting portion h2-1, and the 2-2 cutting portion h2-2 may have at least one outer surface of the cutting portion and all or part of the area from the outer surface of the cutting portion to the outer surface of the substrate removed, so that a part of the cutting portion becomes the outermost surface of the optical path control member.

[0105] For example, since an open area is formed by removing from the outer surface of the cut portion to the outer surface of the second substrate, the outermost part of the light path controlling member in the open area may be a part of the cut portion, i.e., a sealing portion, which may become the outermost surface of the light path controlling member. Thus, at least one of the first sealing portion 510 and the second sealing portion 520 may become the outermost surface of the light path controlling member.

[0106] The sealing portion 500 disposed within the cutting portion will be described in more detail below.

[0107] The first substrate 110 and the second substrate 120 may have the same or similar size.

[0108] In particular, a first length of the first substrate 110 extending in the first direction 1A may have the same or similar size as a second length of the second substrate 120 extending in the first direction 1A.

[0109] For example, the first length and the second length may have a size of 300 mm to 400 mm.

[0110] In addition, the first width of the first substrate 110 extending in the second direction 2A may be the same as or similar to the second width of the second substrate 120 extending in the second direction 2A.

[0111] For example, the first width and the second width may have a size of 150 mm to 200 mm.

[0112] In addition, the first thickness of the first substrate 110 extending in the third direction 3A may have the same or similar size as the second thickness of the second substrate 120 extending in the third direction 3A.

[0113] For example, the first thickness and the second thickness may have a size of 1 mm or less.

[0114] In addition, the first substrate 110 and the second substrate 120 may be formed to have different areas.

[0115] 2 and 3, the first substrate 110 may include a first protrusion PA1, and the second substrate 120 may include a second protrusion PA2. In particular, the first substrate 110 and the second substrate 120 may include the first protrusion PA1 and the second protrusion PA2, respectively, which are offset from each other.

[0116] That is, the first protrusion PA1 and the second protrusion PA2 may be arranged so as not to overlap in the third direction 3A.

[0117] Alternatively, the embodiment is not limited thereto, and the first protrusion PA1 and the second protrusion PA2 may include an overlapping region where they overlap each other and a non-overlapping region where they do not overlap each other, that is, the first protrusion PA1 and the second protrusion PA2 may include an overlapping region where they overlap each other in the third direction and a non-overlapping region where they do not overlap each other.

[0118] In this case, the first protrusion PA1 and the second protrusion PA2 may have different areas, that is, the first substrate 110 and the second substrate 120 may have different sizes corresponding to the difference in size of the protrusions.

[0119] The first protrusion portion PA1 of the first substrate 110 and the second protrusion portion PA2 of the second substrate 120 may each have a connection region formed thereon to be connected to an external printed circuit board or a flexible printed circuit board.

[0120] In detail, a first connecting region CA1 may be disposed on the first protruding portion PA1, and a second connecting region CA2 may be disposed on the second protruding portion PA2. When the first protruding portion PA1 and the second protruding portion PA2 are disposed at positions offset from each other, the first connecting region CA1 and the second connecting region CA2 may be disposed so as not to overlap in the third direction 3A.

[0121] Conductive material is exposed on the top surfaces of the first connecting region CA1 and the second connecting region CA2, respectively, and the optical path control member can be electrically connected to an external printed circuit board or flexible printed circuit board through the first connecting region CA1 and the second connecting region CA2.

[0122] For example, a pad portion may be disposed on the first connection region CA1 and the second connection region CA2, and a conductive adhesive including at least one of an anisotropic conductive film (ACF) and an anisotropic conductive paste (ACP) may be disposed between the pad portion and the printed circuit board or the flexible printed circuit board to connect the optical path control member.

[0123] Alternatively, a conductive adhesive including at least one of an anisotropic conductive film (ACF) and an anisotropic conductive paste (ACP) may be disposed between the first connecting region CA1 and the second connecting region CA2 and the printed circuit board or the flexible printed circuit board, thereby directly connecting the optical path control member without a pad portion.

[0124] The conductive material forming the first connecting region CA1 and the second connecting region CA2 will be described in detail below.

[0125] The light conversion unit 300 may be disposed between the first substrate 110 and the second substrate 120. In particular, the light conversion unit 300 may be disposed between the first electrode 210 and the second electrode 220.

[0126] An adhesive layer or a buffer layer may be disposed between at least one of the optical conversion unit 300 and the first substrate 110 or the optical conversion unit 300 and the second substrate 120, and the first substrate 110, the second substrate 120, and the optical conversion unit 300 may be bonded together by the adhesive layer and / or the buffer layer.

[0127] For example, an adhesive layer 410 may be disposed between the first electrode 210 and the light conversion unit 300, thereby adhering the first substrate 110 and the light conversion unit 300 to each other.

[0128] In addition, a buffer layer 420 is disposed between the second electrode 220 and the light conversion part 300, thereby improving the adhesion between the second electrode 220 and the light conversion part 300, which contain different materials.

[0129] The cut portion may be formed to penetrate all or part of the buffer layer 420 and the light conversion unit 300. That is, the cut portion may penetrate the second substrate 120, the second electrode 220, and the buffer layer 420 in the third direction, and may penetrate all or part of the light conversion unit 300.

[0130] The light conversion unit 300 may include a plurality of partitions 310 and a receiving unit 320. The receiving unit 320 may be provided with a light conversion material 330 including light conversion particles that move in response to an applied voltage and a dispersion liquid that disperses the light conversion particles, and the light transmission characteristics of the light path control member may be changed by the light conversion particles.

[0131] In addition, the receiving part 320 may be provided with a sealing part 500 for sealing the light conversion material 330 and a dam part 600 for easily injecting the light conversion material 330 .

[0132] 3 and 4, the receiving portion 320 may be disposed to extend in one direction. Specifically, the receiving portion 320 may extend in a direction corresponding to the second direction 2A of the first substrate 110 or the second substrate 120. That is, the receiving portion 320 may be disposed to extend in a direction corresponding to the width direction of the first substrate 110 or the second substrate 120.

[0133] As a result, both ends of the receiving portion 320 of the optical path control member according to the first embodiment may be disposed opposite both ends of the first substrate 110 or the second substrate 120. That is, one end of the receiving portion 320 may be disposed opposite one end of the first substrate 110 or the second substrate 120 in the second direction 2A, and the other end of the receiving portion 320 may be disposed opposite the other end of the first substrate 110 or the second substrate 120 in the second direction 2A.

[0134] Thus, both ends of the receiving portion 320 may be disposed in contact with the first sealing portion 510 disposed opposite to the receiving portion 320 in the second direction 2A, and may be disposed apart from the second sealing portion 520.

[0135] Meanwhile, although not shown in the drawing, the receiving portion 320 may be arranged to extend to the second protrusion, and the receiving portion 320 on the second protrusion may not contain a light conversion material or may contain less light conversion material than other receiving portion areas.

[0136] 5 and 6 are cross-sectional views taken along line AA' in FIG.

[0137] Referring to FIGS. 5 and 6, the light conversion unit 300 may include a partition unit 310 and a receiving unit 320.

[0138] The partitions 310 may be defined as partition regions that separate the receiving portions. That is, the partitions 310 can transmit light as partition regions that separate the receiving portions. That is, light emitted toward the first substrate 110 or the second substrate 120 can transmit through the partitions.

[0139] The partition members 310 and the receiving portions 320 may be disposed to extend in the second direction 2A of the first substrate 110 and the second substrate 120. That is, the partition members 310 and the receiving portions 320 may be disposed to extend in the width direction or the length direction of the first substrate 110 and the second substrate 120.

[0140] The partition wall portion 310 and the receiving portion 320 may have different widths. For example, the width of the partition wall portion 310 may be greater than the width of the receiving portion 320.

[0141] In addition, the receiving portion 320 may be formed to extend from the first electrode 210 toward the second electrode 220 and have a shape that narrows in width.

[0142] The partitions 310 and the receiving portions 320 may be arranged alternately. Specifically, the partitions 310 and the receiving portions 320 may be arranged alternately. That is, each partition 310 may be arranged between adjacent receiving portions 320, and each receiving portion 320 may be arranged between adjacent partitions 310.

[0143] The partitions 310 may include a transparent material or a material that can transmit light.

[0144] The partition 310 may include a resin material. For example, the partition 310 may include a photo-curable resin material. For example, the partition 310 may include a UV resin or a transparent photoresist resin. Alternatively, the partition 310 may include a urethane resin or an acrylic resin.

[0145] The receiving part 320 may be formed to partially penetrate the optical conversion part 300. Thus, the receiving part 320 may be disposed in contact with the adhesive layer 410 and spaced apart from the buffer layer 420. Thus, a base part 350 may be formed between the receiving part 320 and the buffer layer 420.

[0146] The receiving part 320 may accommodate the light conversion material 330, which includes light conversion particles 330a and a dispersion liquid 330b in which the light conversion particles 330a are dispersed.

[0147] The dispersion liquid 330b may be a material that disperses the light conversion particles 330a. The dispersion liquid 330b may include a transparent material. The dispersion liquid 330b may include a non-polar solvent. The dispersion liquid 330b may also include a material that can transmit light. For example, the dispersion liquid 330b may include at least one of halocarbon oil, paraffin oil, and isopropyl alcohol.

[0148] The light conversion particles 330a may be dispersed and disposed in the dispersion liquid 330b. Specifically, the light conversion particles 330a may be disposed spaced apart from one another in the dispersion liquid 330b.

[0149] The light-converting particles 330a may include a material capable of absorbing light. That is, the light-converting particles 330a may be light-absorbing particles. The light-converting particles 330a may have a color. For example, the light-converting particles 330a may have a black-based color. For example, the light-converting particles 330a may include carbon black particles.

[0150] The light conversion particles 330a may have a polarity due to a surface charge. For example, the light conversion particles 330a may have a negative (-) surface charge. Therefore, when a voltage is applied, the light conversion particles 330a may move toward the first electrode 210 or the second electrode 220.

[0151] The light transmittance of the receiving portion 320 may be changed by the light converting particles 330a. Specifically, the light transmittance of the receiving portion 320 may be changed into a light blocking portion or a light transmitting portion by the light converting particles 330a. That is, the light transmittance of the receiving portion 320 may be changed by the dispersion and aggregation of the light converting particles 330a disposed within the dispersion liquid 330b.

[0152] For example, the light path member according to the first embodiment can be converted from the first mode to the second mode or from the second mode to the first mode depending on the voltage applied to the first electrode 210 and the second electrode 220 .

[0153] In detail, in the first mode of the light path control member according to the first embodiment, the receiving portion 320 serves as a light blocking portion, and light at a specific angle can be blocked by the receiving portion 320. That is, the viewing angle of the user viewed from the outside becomes narrower, and the light path control member can be driven into the privacy mode.

[0154] In addition, in the second mode of the light path control member according to the first embodiment, the receiving portion 320 serves as a light transmission portion, and the light path control member according to the first embodiment may transmit light through both the partition portion 310 and the receiving portion 320. That is, the viewing angle of a user looking from the outside becomes wider, and the light path control member may be driven into the public mode.

[0155] The conversion from the first mode to the second mode, i.e., the conversion of the receiving portion 320 from a light-blocking portion to a light-transmitting portion, can be achieved by the movement of the light-converting particles 330a of the receiving portion 320. That is, the light-converting particles 330a have charges on their surfaces and can move toward the first electrode or the second electrode when a voltage is applied depending on the characteristics of the charges. That is, the light-converting particles 330a can be electrophoretic particles.

[0156] For example, when no voltage is applied to the light path control member from the outside, the light converting particles 330a of the receiving unit 320 are uniformly dispersed in the dispersion liquid 330b, and thus, the light converting particles 330a of the receiving unit 320 can block light. Thus, in the first mode, the receiving unit 320 can be operated as a light blocking unit.

[0157] Alternatively, the light converting particles 330a may move when a voltage is applied to the light path control member from the outside. For example, the light converting particles 330a may move toward one end or the other end of the receiving portion 320 due to the voltage transmitted through the first electrode 210 and the second electrode 220. That is, the light converting particles 330a may move toward the first electrode 210 or the second electrode 220.

[0158] For example, when a voltage is applied to the first electrode 210 and / or the second electrode 220, an electric field is formed between the first electrode 210 and the second electrode 220, and the negatively charged light conversion particles 330a can move toward the positive electrode of the first electrode 210 or the second electrode 220 using the dispersion liquid 330b as a medium.

[0159] As an example, in the initial mode or when no voltage is applied to the first electrode 210 and / or the second electrode 220, the light conversion particles 330a are uniformly dispersed in the dispersion liquid 330b, as shown in FIG. 5, and the receiving portion 320 can be operated as a light blocking portion.

[0160] 6, when a voltage is applied to the first electrode 210 and / or the second electrode 220, the light conversion particles 330a may move in the dispersion liquid 330b toward the second electrode 220. That is, the light conversion particles 330a may move in one direction, and the receiving part 320 may be operated as a light transmitting part.

[0161] As a result, the light path control member according to the first embodiment can be driven in two modes depending on the user's surrounding environment, etc. That is, when the user desires light transmission only at a specific viewing angle, the receiving unit can be driven as a light blocking unit, or when the user desires a wide viewing angle and high brightness, the receiving unit can be driven as a light transmitting unit by applying a voltage.

[0162] Therefore, the light path control member according to the first embodiment can be realized in two modes according to the user's request, and therefore the light path member can be applied without being restricted by the user's environment or the like.

[0163] The second sealing part 520 may be disposed at the outermost part of the light path control member. In particular, the second sealing part 520 may be disposed at the outermost part of the light path control member in the first direction 1A, extending in the second direction 2A and facing each other.

[0164] The second sealing portion 520 may be disposed inside the cutting portion. Specifically, the second sealing portion 520 may be disposed inside the 2-1 cutting portion h2-1 and the 2-2 cutting portion h2-2.

[0165] That is, the 2-1 cut portion h2-1 and the 2-2 cut portion h2-2 are formed by sequentially penetrating the second substrate 120, the second electrode 220, the buffer layer 420, and part or all of the optical conversion unit 300 including the base portion 350 and the partition portion 310, and the second sealing portion 520 can be formed by disposing a sealing material inside the 2-1 cut portion h2-1 and the 2-2 cut portion h2-2.

[0166] That is, one surface of the partition wall portion 310 or the adhesive layer 410 may be exposed through the 2-1 cut portion h2-1 and the 2-2 cut portion h2-2, and the second sealing portion 520 may be disposed in contact with the partition wall portion 310 or the adhesive layer 410.

[0167] The second sealing portion 520 may be disposed in contact with a side surface of the second substrate 120. The second sealing portion 520 may be disposed in contact with a side surface of the second electrode 220. The second sealing portion 520 may be disposed in contact with a side surface of the buffer layer 420. The second sealing portion 520 may be disposed in contact with a side surface of the base portion 350. The second sealing portion 520 may be disposed in contact with a side surface of the partition wall portion 310.

[0168] The second sealing part 520 is disposed on a side of the light path control member, i.e., a side in the second direction 2A, and can prevent impurities that can penetrate from the outside from penetrating into the light conversion part 300.

[0169] The second sealing portion 520 may be disposed so as to completely fill the 2-1 cutting portion h2-1 and the 2-2 cutting portion h2-2, or may be disposed at a height lower than the depth of the 2-1 cutting portion h2-1 and the 2-2 cutting portion h2-2. Thus, as shown in FIGS. 5 and 6, the upper surface of the second sealing portion 520 may be disposed at a height lower than the upper surface of the second substrate 120. That is, a step may be formed between the upper surface of the second sealing portion 520 and the upper surface of the second substrate 120. The upper surface of the second sealing portion 520 may also be formed in a concave shape.

[0170] Meanwhile, in Figures 5 and 6, the 2-1 cut portion h2-1 and the 2-2 cut portion h2-2 are shown to be formed to a depth that exposes one surface of the partition portion of the optical conversion portion 300, but the embodiment is not limited thereto.

[0171] That is, the depths of the 2-1 cut portion h2-1 and the 2-2 cut portion h2-2 may vary depending on the process method and process time for forming the 2-1 cut portion h2-1 and the 2-2 cut portion h2-2.

[0172] For example, at least one of the 2-1 cut portion h2-1 and the 2-2 cut portion h2-2 may be formed to a depth that partially penetrates the optical conversion portion 300, thereby exposing one side of the base portion, the partition portion 310, or the accommodating portion 320 through the 2-1 cut portion h2-1 and the 2-2 cut portion h2-2.

[0173] Therefore, the second sealing portion 520 may be spaced apart from the adhesive layer 410 .

[0174] Alternatively, at least one of the 2-1 cut portion h2-1 and the 2-2 cut portion h2-2 may be formed to a depth that partially penetrates the optical conversion portion 300, thereby exposing one side of the adhesive layer 410 through the 2-1 cut portion h2-1 and the 2-2 cut portion h2-2.

[0175] Alternatively, at least one of the 2-1 cut portion h2-1 and the 2-2 cut portion h2-2 may be formed to a depth that partially penetrates the adhesive layer 410, thereby exposing one side of the adhesive layer 410 through the 2-1 cut portion h2-1 and the 2-2 cut portion h2-2.

[0176] Alternatively, at least one of the 2-1 cut portion h2-1 and the 2-2 cut portion h2-2 may be formed to a depth that partially penetrates the first electrode 210, thereby exposing one side of the first electrode 210 through the 2-1 cut portion h2-1 and the 2-2 cut portion h2-2.

[0177] Alternatively, at least one of the 2-1 cut portion h2-1 and the 2-2 cut portion h2-2 may be formed to a depth that partially penetrates the first substrate 110, thereby exposing one side of the first substrate 110 through the 2-1 cut portion h2-1 and the 2-2 cut portion h2-2.

[0178] Fig. 7 is a cross-sectional view taken along the line BB' in Fig. 1. That is, Fig. 7 is a cross-sectional view taken along the line BB' in Fig. 1. One of the first sealing portions 510 is cut at both ends.

[0179] 7, the first sealing portion 510 may be disposed within the first-1 cutting portion h1-1. The first sealing portion 510 may be disposed in contact with a side surface of the second substrate 120. The first sealing portion 510 may be disposed in contact with a side surface of the second electrode 220. The first sealing portion 510 may be disposed in contact with a side surface of the buffer layer 420. The first sealing portion 510 may be disposed in contact with a side surface of the base portion 350. The first sealing portion 510 may be disposed in contact with a side surface of the partition wall portion 310.

[0180] In addition, in an area where the 1-1 cutting portion, the 2-1 cutting portion, and the 2-2 cutting portion overlap, the second sealing portion 520 may be disposed on the first sealing portion 510. That is, since the second sealing portion 520 is formed after the first sealing portion 510 is formed, the second sealing portion 520 may be disposed on the first sealing portion 510 in an area where the first sealing portion 510 and the second sealing portion 520 overlap.

[0181] For example, the 1-1 cutting portion h1-1 may be formed to penetrate through all of the second substrate 120, the second electrode 220, the buffer layer 420, and the light conversion unit 300, and the first sealing portion 510 may be disposed in contact with a side surface of the second substrate 120, a side surface of the second electrode 220, a side surface of the buffer layer 420, a side surface of the base portion 350, and a side surface of the partition wall portion 310. The 1-1 cutting portion h1-1 may be disposed in contact with one end of the second substrate 120 in the first direction 1A and both ends in the second direction 2A.

[0182] That is, the 1-1 cut portion h1-1 may be formed by removing one outer surface of the second substrate 120 in the first direction 1A and removing both outer surfaces of the second substrate 120 in the second direction 2A. As a result, a portion of the 1-1 cut portion h1-1 at one outer surface of the second substrate 120 in the first direction 1A may become the outermost surface of the second substrate 120, and at portions of both outer surfaces of the second substrate 120 in the second direction 2A where the 1-1 cut portion h1-1 is formed, may become the outermost surface of the second substrate 120.

[0183] The first-1 cut portion h1-1 may be formed by sequentially penetrating the second substrate 120, the second electrode 220, the buffer layer 420, and the light conversion unit 300 including the base portion 350 and the partition portion 310. Then, the first sealing portion 510 may be formed by disposing a sealing material inside the first-1 cut portion h1-1.

[0184] The sealing materials of the first sealing portion 510 and the second sealing portion 520 may include the same material, or may include different materials.

[0185] For example, at least one of the sealing material of the first sealing portion 510 and the second sealing portion 520 may include a photo-curable material. Also, at least one of the sealing material of the first sealing portion 510 and the second sealing portion 520 may include a material that is less reactive with the light conversion material. For example, at least one of the sealing material of the first sealing portion 510 and the second sealing portion 520 may include polyurethane acrylate.

[0186] The 1-1 cutting portion h1-1 is formed by sequentially penetrating the second substrate 120, the second electrode 220, the buffer layer 420, and the light conversion portion 300 including the base portion 350 and the partition portion 310, so that one side of the adhesive layer 410 may be exposed through the 1-1 cutting portion h1-1.

[0187] Accordingly, the first sealing portion 510 disposed inside the first-1 cutting portion h1-1 may be disposed in contact with the adhesive layer 410 inside the first-1 cutting portion h1-1.

[0188] The first sealing part 520 is disposed on a side of the light path control member, i.e., on a side in the first direction 1A, and can seal the receiving part 320 of the light conversion part 300. That is, the first sealing part 520 can prevent the light conversion material 330 received inside the receiving part 320 from leaking out to the outside and can prevent impurities that can penetrate from the outside from penetrating into the light conversion part 300.

[0189] The first sealing portion 510 may be disposed to completely fill the first-1 cutting portion h1-1 or may be disposed at a height lower than the depth of the first-1 cutting portion h1-1. Thus, the upper surface of the first sealing portion 510 may be disposed at a height lower than the upper surface of the second substrate 120. That is, a step may be formed between the upper surface of the first sealing portion 510 and the upper surface of the first substrate 110. In addition, the upper surface of the first sealing portion 510 may be formed in a concave shape.

[0190] Fig. 8 is a cross-sectional view taken along the CC' area of Fig. 1. That is, Fig. 8 is a cross-sectional view taken in the first direction of both ends of the sealing portion where the first sealing portion 510 and the second sealing portion 520 are connected.

[0191] Referring to FIG. 8, the 1-2 cut portion h1-2 and the 2-1 cut portion h2-1 may be connected to each other.

[0192] In addition, the 1-2 cut portion h1-2 may be separated from the 2-2 cut portion h2-2, that is, one end of the 1-2 cut portion h1-2 may be separated from the 2-2 cut portion h2-2.

[0193] The first-2 cut portion h1-2 and the second-2 cut portion h2-2 are spaced apart from each other, so that an open area OA may be formed in the second substrate 120 between the first-2 cut portion h1-2 and the second-2 cut portion h2-2.

[0194] The electrode connector 700 in the second connecting region CA2 disposed in the second protrusion portion PA2 of the second substrate 120 may be connected to the second electrode 220 without disconnection through the second electrode 220 disposed in the open area OA. That is, the current and voltage transmitted through the open area OA may be applied to the light conversion material 330 in the receiving portion 320 disposed between the first sealing portion 510 and the second sealing portion.

[0195] Since the 1-2 cutting portion h1-2 and the 2-1 cutting portion h2-1 are connected, the first sealing portion 510 disposed at the 1-2 cutting portion h1-2 and the second sealing portion 520 disposed at the 2-1 cutting portion h2-1 may be connected to each other. Also, since the 1-2 cutting portion h1-2 and the 2-2 cutting portion h2-2 are spaced apart, the first sealing portion 510 disposed at the 1-2 cutting portion h1-2 may be spaced apart from the second sealing portion 520 disposed at the 2-2 cutting portion h2-2.

[0196] Meanwhile, in the drawings, the 2-1 cut portion h2-1 is shown to be disposed apart from the end, i.e., outer surface, of the second substrate 120 in the first direction 1A, but the embodiment is not limited thereto, and may be formed by removing one outer surface of the second substrate 120 in the first direction 1A, like the 1-1 cut portion h1-1 described above. As a result, a portion of the 2-1 cut portion h2-1 may become the outermost surface of the second substrate 120 on one outer surface of the second substrate 120 in the first direction 1A.

[0197] Meanwhile, the 2-1 cut portion h2-1 and the 2-2 cut portion h2-2 may be disposed to have different lengths. Specifically, the length of the 2-2 cut portion h2-2 in the second direction 2A may be greater than the length of the 2-1 cut portion h2-1 in the second direction 2A.

[0198] The 2-2 cut portion h2-2 is disposed to extend to the second protrusion portion PA2 of the second substrate 120, so that the length of the 2-2 cut portion h2-2 can be longer than the length of the 2-1 cut portion h2-1.

[0199] Accordingly, the lengths of the second sealing portion 520 disposed inside the 2-1 cutting portion h2-1 and the 2-2 cutting portion h2-2 may also vary. That is, the length of the second sealing portion 520 disposed inside the 2-2 cutting portion h2-2 may be longer than the length of the second sealing portion 520 disposed in the 2-1 cutting portion h2-1.

[0200] A first sealing portion and a second sealing portion may be disposed inside the first cutting portion, the first cutting portion, the second cutting portion, and the second cutting portion, respectively.

[0201] Furthermore, in an area where the 1-2 cut portion and the 2-1 cut portion overlap, the second sealing portion 520 may be disposed on the first sealing portion 510. That is, since the second sealing portion 520 is formed after the first sealing portion 510 is formed, the second sealing portion 520 may be disposed on the first sealing portion 510 in an area where the first sealing portion 510 and the second sealing portion 520 overlap. The first sealing portion 510 and the second sealing portion 520 may be disposed to seal the inlet and outlet of a container that contains the light conversion material, and may be disposed to extend along a side region of the light conversion portion, i.e., a side region in the first direction.

[0202] As a result, the first sealing portion can prevent the light conversion material inside the accommodating portion from leaking out to the outside of the light conversion portion, and the first sealing portion and the second sealing portion can prevent impurities from penetrating into the inside of the light conversion portion from the outside, thereby improving the reliability of the light path control member.

[0203] Furthermore, since the first sealing portion and the second sealing portion are disposed inside the cut portion formed on the second substrate, the size of the optical path control member can be reduced compared to when the first sealing portion and the second sealing portion are formed outside the optical conversion portion, and the sealing portion material is prevented from being altered by the external environment, thereby improving the sealing characteristics of the optical path control member.

[0204] Fig. 9 is a diagram showing a cross-sectional view taken along the DD' region of Fig. 1. That is, Fig. 9 is a diagram showing a cross-sectional view taken along the protruding portion regions of the first substrate and the second substrate.

[0205] 9, the first protrusion portion PA1 of the first substrate 110 and the second protrusion portion PA2 of the second substrate 120 may be spaced apart from each other. That is, the first protrusion portion PA1 of the first substrate 110 and the second protrusion portion PA2 of the second substrate 120 may be spaced apart from each other in the first direction 1A.

[0206] Therefore, the first substrate 110, the first electrode 210, and the adhesive layer 410 may not be disposed under the second protrusion portion PA2.

[0207] This physically separates the first connecting region CA1 arranged on the first protrusion PA1 from the second connecting region CA2 arranged on the second protrusion PA2, thereby preventing the first connecting region CA1 and the second connecting region CA2 from being electrically connected to each other via the adhesive layer.

[0208] The first connection region CA1 may be disposed on the first protrusion portion PA1. The first electrode 210 may be exposed in the first connection region CA1. That is, the adhesive layer 410 on the first protrusion portion PA1 may be partially removed to expose the first electrode 210 on the first substrate 110, thereby exposing the top surface of the first electrode 210 in the first connection region CA1. That is, the first electrode 210 exposed in the first connection region CA1 may become a first connection electrode that is connected to an external printed circuit board or a flexible printed circuit board.

[0209] In addition, a second connecting region CA2 may be disposed on the second protrusion PA2. A third cut portion h3 may be formed in the second connecting region CA2. An electrode connector 700 including a conductive material may be disposed within the third cut portion h3.

[0210] The electrode connector 700 may include a different material from at least one of the first electrode 210 and the second electrode 220. In addition, the light transmittance of the electrode connector 700 may be lower than the light transmittance of at least one of the first electrode 210 and the second electrode 220.

[0211] For example, the electrode connector 700 may include a metal. In particular, the electrode connector 700 may include a metal paste in which metal particles are dispersed in a binder.

[0212] The electrode connecting unit 700 may be disposed in contact with a side surface of the second substrate 120. The electrode connecting unit 700 may be disposed in contact with a side surface of the second electrode 220. The electrode connecting unit 700 may be disposed in contact with a side surface of the buffer layer 420. The electrode connecting unit 700 may be disposed in contact with a side surface of the base portion 350. The electrode connecting unit 700 may be disposed in contact with a side surface of the partition wall portion 310.

[0213] That is, the electrode connector 700 may be disposed in contact with at least one side of the second substrate 120 , the second electrode 220 , the buffer layer 420 , the base 350 , and the partition 310 .

[0214] In addition, a protective layer may be further disposed on the lower surface of the electrode connecting portion, thereby preventing oxidation or deterioration of the electrode connecting portion exposed to the outside.

[0215] The upper surface of the electrode connector 700 may be flush with or lower than the upper surface of the second substrate 120. For example, the upper surface of the electrode connector 700 may be flush with the upper surface of the second substrate 120. Alternatively, the upper surface of the electrode connector 700 may be lower than the upper surface of the second substrate 120.

[0216] Accordingly, the upper surface of the electrode connector 700 and the upper surface of the second substrate 120 may be formed on the same plane without any step, or may be arranged with a step such that the upper surface of the electrode connector 700 is lower.

[0217] Therefore, the overall thickness of the light path controlling member can be reduced by preventing the overall thickness of the light path controlling member from increasing due to the height of the electrode connector 700 .

[0218] The electrode connecting part 700 may be electrically connected to the second electrode 220 and exposed to the outside of the second substrate 120. That is, the electrode connecting part 700 may be exposed to the second protrusion part PA2 of the second substrate 120. That is, the upper surface of the electrode connecting part 700 may be exposed to the second connection area CA2.

[0219] Therefore, the electrode connecting part 700 exposed in the second connecting area CA2 may become a second connecting electrode connected to an external printed circuit board or a flexible printed circuit board.

[0220] Thus, the first electrode 210 and the second electrode 220 may be electrically connected to the same printed circuit board or flexible printed circuit board via the first connecting electrode in the first connecting region and the second connecting electrode in the second connecting region, respectively.

[0221] At this time, since the first connecting electrode and the second connecting electrode are disposed on the same surface, the first connecting electrode and the second connecting electrode can be easily connected to one printed circuit board.

[0222] Alternatively, the first electrode 210 and the second electrode 220 may be electrically connected to another printed circuit board or a flexible printed circuit board via a first connecting electrode in a first connecting region and a second connecting electrode in a second connecting region, respectively. That is, the first connecting electrode may be connected to a first circuit board, and the second connecting electrode may be connected to a second circuit board different from the first circuit board.

[0223] In the optical path control member of the first embodiment, the first connecting electrode of the first connecting region and the second connecting electrode of the second connecting region can be arranged on first protrusions and second protrusions formed on the first substrate and the second substrate.

[0224] The first and second protrusions may protrude only to an area where the first connecting region and the second connecting electrode can be formed, without protruding from the entire surfaces of the first and second substrates.

[0225] This reduces the areas of the first and second protrusions, and therefore, when the light path control member is combined with a display panel or the like to be applied to a display device, other components of the display device can be disposed in areas not corresponding to the first and second protrusions, thereby reducing the bezel area of the display device.

[0226] That is, the light path control member according to the first embodiment reduces the size of the bezel area where the connecting electrodes are arranged, and thus the bezel area of the display device to which the light path control member is applied can also be reduced.

[0227] Fig. 10 is a cross-sectional view taken along the EE' region of Fig. 1. That is, Fig. 10 is a cross-sectional view taken along both ends of the 2-2 cut portion in the second direction.

[0228] Referring to FIG. 10, the 2-2 cut portion h2-2 may be disposed to extend from the second protrusion portion PA2 of the second substrate 120 in the second direction 2A.

[0229] Referring to FIG. 10, the 1-1 cut portion h1-1 and the 2-2 cut portion h2-2 may be connected to each other.

[0230] Since the 1-1 cutting portion h1-1 and the 2-2 cutting portion h2-2 are connected, the first sealing portion 510 arranged at the 1-1 cutting portion h1-1 and the second sealing portion 520 arranged at the 2-2 cutting portion h2-2 can be arranged to be connected to each other.

[0231] In addition, in an area where the 1-1 cut portion h1-1 and the 2-2 cut portion h2-2 overlap, the second sealing portion 520 may be disposed on the first sealing portion 510. That is, since the second sealing portion 520 is formed after the first sealing portion 510 is formed, the second sealing portion 520 may be disposed on the first sealing portion 510 in an area where the first sealing portion 510 and the second sealing portion 520 overlap.

[0232] Meanwhile, in the drawings, the 2-2 cut portion h2-2 is shown to be disposed apart from the end, i.e., outer surface, of the second substrate 120 in the first direction 1A, but the embodiment is not limited thereto and may be formed by removing one outer surface of the second substrate 120 in the first direction 1A, like the 1-1 cut portion h1-1 described above. As a result, a portion of the 2-2 cut portion h2-2 may become the outermost surface of the second substrate 120 on one outer surface of the second substrate 120 in the first direction 1A.

[0233] Figure 11 is a cross-sectional view taken along the F-F' region of Figure 1, and Figure 12 is a cross-sectional view taken along the G-G' region of Figure 1. That is, Figures 11 and 12 are cross-sectional views taken along the second direction of the second connecting region CA2 arranged in the second protrusion portion PA2.

[0234] 11 and 12, the second connecting region CA2 may include an overlapping region with the first sealing portion 510 and a non-overlapping region.

[0235] That is, since the 1-2 cutting portion h1-2 and the 2-2 cutting portion h2-2 are arranged spaced apart from each other, the second connecting area CA2 can be arranged in an area overlapping with the open area OA in the second direction and in an area overlapping with the first sealing portion 510 arranged inside the 1-2 cutting portion h1-2.

[0236] 12, a dam portion 600 may be disposed in the second connecting region CA2, i.e., between the electrode connecting portion 700 and the first sealing portion 510. That is, the dam portion 600 may be disposed on the second protrusion portion PA2 between the electrode connecting portion 700 and the first sealing portion 510.

[0237] The dam unit 600 may be formed by filling a cut portion that penetrates the second substrate 120, the second electrode 220, the buffer layer 410, and the light conversion unit 300 with a material that forms a dam.

[0238] The dam portion 600 is a material that controls the injection length of the light conversion material 330 when the light conversion material 330 is injected into the receiving portion 320, and the dam portion 600 can prevent the light conversion material 330 from overflowing toward the outside of the dam, i.e., toward the electrode connecting portion 700.

[0239] The dam portion 600 may be partially removed during the manufacturing process of the light path control member, and partially remain in the region adjacent to the second connection region CA2.

[0240] On the other hand, if the light conversion unit 300 between the electrode connecting unit 700 and the dam unit 600 is in the partition unit 310 region, the light conversion unit 300, the buffer layer 420, the second electrode 220, and the second substrate 120 may remain between the electrode connecting unit 700 and the dam unit 600, as shown in FIG. 12.

[0241] Alternatively, if the light conversion unit 300 between the electrode connector 700 and the dam unit 600 is in the receiving unit 320 region, the material of the dam unit 600 may move into the receiving unit 320, causing the dam unit 600 and the electrode connector 700 to come into contact with each other.

[0242] In addition, when the light conversion unit 300 between the dam unit 600 and the first sealing unit 510 is the partition unit 310 area, the light conversion unit 300, the buffer layer 420, the second electrode 220, and the second substrate 120 may remain between the dam unit 600 and the first sealing unit 510 as shown in FIG. 12.

[0243] Alternatively, if the optical conversion unit 300 between the dam unit 600 and the first sealing unit 510 is in the receiving unit 320 area, the material of the first sealing unit 510 and the dam unit 600 may move into the receiving unit 320, causing the first sealing unit 510 and the dam unit 600 to come into contact with each other.

[0244] Fig. 13 is a diagram showing a cross-sectional view taken along the HH' region in Fig. 1. That is, Fig. 13 is a diagram showing a cross-sectional view taken along the second direction of one accommodation section of the optical path controlling member.

[0245] 13, a light conversion material 330 may be disposed inside the receiving portion 320. In particular, the light conversion material 330 and a first sealing portion 510 may be disposed inside the receiving portion 320.

[0246] The first sealing parts 510 are disposed at one end and the other end of the receiving part 320 in the second direction 2A, and may seal the light conversion material 330 disposed inside the receiving part 320.

[0247] The light converting material 330 inside the receiving portion 320 is sealed by the first sealing portion 510, thereby preventing the light converting material 330 from leaking out of the light path control member.

[0248] The first sealing portion 510 disposed in the 1-1 cut portion h1-1 may be disposed in contact with the light conversion material 330. In addition, the first sealing portion 510 disposed in the 1-2 cut portion h1-2 may be disposed in contact with the light conversion material 300 and the first mixed region 810.

[0249] The first mixed region 810 may be a region where both the material of the dam portion 600 and the material of the first sealing portion 510 are disposed, and are removed during the manufacturing process of the light path controlling member.

[0250] That is, the first mixed region 810 may contain the same or different material as the first sealing portion 510 .

[0251] For example, if the first sealing portion 510 and the dam portion 600 contain the same material, the first mixing region 810 may be a region where the first sealing portion 510 extends.

[0252] Alternatively, when the first sealing portion 510 and the dam portion 600 contain different materials, the first mixing region 810 may be a region where the materials of the first sealing portion 510 and the dam portion 600 are mixed, or a region where the materials of the first sealing portion 510 and the dam portion 600 are not mixed with each other but are separated and arranged together with an interface therebetween.

[0253] The first mixing region 810 disposed inside the receiving part 320 can minimize the generation of air bubbles inside the receiving part 320 .

[0254] That is, in any one of the receiving portions, the size of the space between the first sealing portion 510 and the dam portion 600 may vary depending on the amount of material injected into the dam portion 600. By disposing an appropriate amount of the sealing material of the first sealing portion 510 inside such a space, the inside of the receiving portion can be filled with the first sealing portion 510 and the light conversion material 330.

[0255] This prevents the occurrence of bubbles due to voids inside the receiving portion 320 and the resulting light leakage.

[0256] Fig. 14 is a diagram showing a cross-sectional view taken along the II' region in Fig. 1. That is, Fig. 14 is a diagram showing a cross-sectional view taken along the second direction of one partition portion of the optical path controlling member.

[0257] Referring to FIG. 14, the partition wall 310 may be disposed in a region corresponding to the partition wall 310, and the partition wall 310 may be entirely removed from the second substrate 120 to form a first sealing portion 510.

[0258] That is, the first sealing part 510 may be disposed in the area where the partition is disposed, thereby increasing the area of the first sealing part 510 by the size where the partition is removed.

[0259] Therefore, the placement area of the first sealing part 510 can be increased without increasing the thickness of the first sealing part 510. Furthermore, since the contact area of the first sealing part 510 is increased, the adhesive properties of the first sealing part can be improved.

[0260] Therefore, the sealing property of the light conversion material by the first sealing part 510 can be improved.

[0261] The optical path control member of the first embodiment may have a 1-1 cut portion, a 1-2 cut portion, a 2-1 cut portion, and a 2-2 cut portion formed on the second substrate, penetrating the second substrate, the second electrode, and the buffer layer, and penetrating all or part of the optical conversion portion.

[0262] Also, a first sealing portion and a second sealing portion may be disposed inside the first cutting portion, the first cutting portion, the second cutting portion, and the second cutting portion, respectively.

[0263] The first sealing portion and the second sealing portion are arranged to seal the inlet and outlet portions of the container that contains the light conversion material, and may be arranged to extend along the side area of the light conversion portion, i.e., the side area in the first direction.

[0264] As a result, the first sealing portion can prevent the light conversion material inside the accommodating portion from leaking out to the outside of the light conversion portion, and the first sealing portion and the second sealing portion can prevent impurities from penetrating into the inside of the light conversion portion from the outside, thereby improving the reliability of the light path control member.

[0265] Furthermore, since the first sealing portion and the second sealing portion are disposed inside the cut portion formed on the second substrate, the size of the optical path control member can be reduced compared to when the first sealing portion and the second sealing portion are formed outside the optical conversion portion, and the sealing portion material is prevented from being altered by the external environment, thereby improving the sealing characteristics of the optical path control member.

[0266] Furthermore, in the optical path control member of the first embodiment, the first connecting electrode can be arranged on a first protrusion formed on the first substrate, and the second connecting electrode can be arranged on a second protrusion formed on the second substrate.

[0267] The first and second protrusions may protrude only to an area where the first and second connecting electrodes can be formed, without protruding the entire surfaces of the first and second substrates.

[0268] This reduces the areas of the first and second protrusions, and therefore, when the light path control member is combined with a display panel or the like to be applied to a display device, other components of the display device can be disposed in areas not corresponding to the first and second protrusions, thereby reducing the bezel area of the display device.

[0269] That is, the light path control member according to the first embodiment reduces the size of the bezel area where the connecting electrodes are arranged, and thus the bezel area of the display device to which the light path control member is applied can also be reduced.

[0270] The optical path controlling member according to the second embodiment will be described below with reference to FIGS.

[0271] In the description of the optical path control member according to the second embodiment, the description of the same or similar parts as those of the optical path control member according to the first embodiment will be omitted, and the same components will be given the same reference numerals.

[0272] 15 to 25, the optical path control member according to the second embodiment differs from the first embodiment in that the receiving portion 320 of the optical conversion unit may be tilted at a certain angle.

[0273] 15 to 18, the receiving portion 320 may extend in a direction different from the first direction 1A and the second direction 2A.

[0274] Accordingly, at least one of the accommodating portions 320 may have one end and the other end in contact with the first sealing portion 510, and at least one of the accommodating portions may have one end and the other end in contact with the first sealing portion 510 and the second sealing portion 520.

[0275] Since the receiving portion is inclined at a certain inclination angle, when the optical path control member is combined with a display panel or the like to form a display device, it is possible to prevent a moire phenomenon that occurs when the receiving portion of the optical path control member overlaps with the pattern portion of the display panel.

[0276] That is, the receiving portion 320 according to the second embodiment may have one end and the other end formed on both the outer surface in the first direction and the outer surface in the second direction of the light path control member.

[0277] Fig. 19 is a diagram showing a cross-sectional view taken along the J-J' region in Fig. 15 and Fig. 18. That is, Fig. 19 is a diagram showing a cross-sectional view taken along the tilt angle direction of one accommodation section of the optical path controlling member.

[0278] 19, the light conversion material 330 may be disposed inside the receiving portion 320. In particular, the light conversion material 330 and a first sealing portion 510 may be disposed inside the receiving portion 320.

[0279] The first sealing parts 510 are disposed at one end and the other end of the receiving part 320 in the second direction 2A, and may seal the light conversion material 330 disposed inside the receiving part 320.

[0280] That is, at least one of the plurality of receiving portions of the optical conversion unit may be disposed in contact with only the first sealing portion 510 .

[0281] The light converting material 330 inside the receiving portion 320 is sealed by the first sealing portion 510, thereby preventing the light converting material 330 from leaking out of the light path control member.

[0282] The first sealing portion 510 disposed in the 1-1 cut portion h1-1 may be disposed in contact with the light conversion material 330. In addition, the first sealing portion 510 disposed in the 1-2 cut portion h1-2 may be disposed in contact with the light conversion material 330 and the first mixed region 810.

[0283] The first mixed region 810 may be a region where the material of the dam portion 600 and the material of the first sealing portion 510, which are removed during the manufacturing process of the light path controlling member, are mixed or separated.

[0284] That is, the first mixed region 810 may contain the same or different material as the first sealing portion 510 .

[0285] For example, if the first sealing portion 510 and the dam portion 600 contain the same material, the first mixing region 810 may be a region where the first sealing portion 510 extends.

[0286] Alternatively, when the first sealing portion 510 and the dam portion 600 contain different materials, the first mixing region 810 may be a region where the materials of the first sealing portion 510 and the dam portion 600 are mixed, or a region where the materials of the first sealing portion 510 and the dam portion 600 are not mixed with each other and are separated while having an interface.

[0287] The first mixing region 810 disposed inside the receiving part 320 can minimize the generation of air bubbles inside the receiving part 320 .

[0288] That is, in any one of the receiving portions, the size of the space between the first sealing portion 510 and the dam portion 600 may vary depending on the amount of material injected into the dam portion 600. By disposing an appropriate amount of the sealing material of the first sealing portion 510 inside such a space, the inside of the receiving portion can be filled with the first sealing portion 510 and the light conversion material 330.

[0289] This prevents the occurrence of bubbles due to voids inside the receiving portion 320 and the resulting light leakage.

[0290] Fig. 20 is a diagram showing a cross-sectional view taken along the K-K' region in Fig. 15 and Fig. 18. That is, Fig. 20 is a diagram showing a cross-sectional view taken along the tilt angle direction of the outermost housing portion of the optical path controlling member.

[0291] 20, the light conversion material 330 may be disposed inside the receiving portion 320. In particular, the light conversion material 330, a first sealing portion 510, and the second sealing portion 520 may be disposed inside the receiving portion 320.

[0292] The first sealing part 510 and the second sealing part 520 may seal the light conversion material 330 disposed inside the receiving part 320 .

[0293] That is, the first sealing part 510 may seal the end of the receiving part 320 in the outer side direction in the second direction, and the second sealing part 520 may seal the end of the receiving part 320 in the outer side direction in the first direction.

[0294] That is, at least one of the receiving portions of the optical conversion unit may be disposed in contact with the first sealing portion 510 and the second sealing portion 520 .

[0295] The light conversion material 330 inside the receiving part 320 is sealed by the first sealing part 510 and the second sealing part 520, thereby preventing the light conversion material from leaking out.

[0296] The first sealing portion 510 disposed at the 1-1 cut portion h1-1 may be disposed in contact with the light conversion material 330. Alternatively, the first sealing portion 510 disposed at the 1-1 cut portion h1-1 may be disposed in contact with the light conversion material 330 and the second mixed region 820.

[0297] The second mixed region 820 may be a region including both the first sealing portion 510 and the light conversion material 330 .

[0298] That is, the first sealing portion 510 disposed in the 1-1 cutting portion h1-1 may have some sealing material permeating into the inside of the receiving portion 320 in the area overlapping with the receiving portion 320, or the light conversion material 330 may permeate into the inside of the 1-1 cutting portion h1-1.

[0299] In the second mixed region 820, the light conversion material 330 and the sealing material may be arranged in a phase-separated manner or in a mixed manner.

[0300] In addition, the first sealing part 510 disposed at the 1-1 cutting portion h1-1 has a portion of the sealing material permeate into the receiving part 320 in the area overlapping with the receiving part 320, and the first sealing part 510 can improve the adhesive properties of the second sealing part through an anchoring effect, thereby preventing the second sealing part from peeling off.

[0301] In addition, the second sealing part 520 disposed in the 2-1 cut portion h2-1 may be disposed in contact with the light conversion material 330. In particular, one surface of the second sealing part 520 facing the first sealing part may be in contact with the light conversion material 330. In addition, the light conversion material 330 may be present on the other surface opposite to the one surface and may be in contact with the light conversion material 330. In addition, the other surface opposite to the one surface may be a second mixed region containing both the light conversion material 330 and the sealing material.

[0302] Fig. 21 is a diagram showing a cross-sectional view taken along the L-L' region of Fig. 15 and Fig. 18. That is, Fig. 21 is a diagram showing a cross-sectional view taken along the extension direction of the second sealing portion of the light path controlling member.

[0303] 21, the second sealing portion 520 may be formed by penetrating the second substrate 120, the second electrode 220, and the buffer layer 410 and by removing a portion of the receiving portion 320 and the partition portion 310. The second sealing portion 520 may also be formed across the receiving portion 320 and the partition portion 310. That is, the partition portion 310 and the receiving portion 320 may be alternately arranged below the second sealing portion 520.

[0304] A light conversion material 330 may be disposed inside the remaining receiving portion 320. Specifically, when the light conversion material 330 is filled inside the receiving portion 320, one end of the light conversion material 330 inside the receiving portion 320 is sealed by the first sealing portion 510, thereby minimizing movement of the light conversion material. Subsequently, the 2-1 cut portion h2-1 is formed, and the second sealing portion 520 is formed, thereby sealing the light conversion material remaining in the receiving portion below the second sealing portion. That is, the second sealing portion 520 may seal the light conversion material 330 while contacting the side and top surfaces of the light conversion material 330.

[0305] Preferably, when the second sealing part is formed, both the receiving part and the partition part are removed, thereby preventing the light conversion material from leaking out.

[0306] Meanwhile, a third mixed region may be formed in a region where the second sealing portion 520 and the receiving portion 320 overlap, ie, contact each other.

[0307] The third mixed region may be a region where the second sealing portion 520 and the light conversion material 330 are mixed.

[0308] That is, the second sealing portion 520 disposed in the 2-1 cutting portion h2-1 may have some sealing material permeating into the inside of the receiving portion 320 in the area overlapping with the receiving portion 320, or the light conversion material may permeate into the inside of the 2-1 cutting portion h2-1 and mix with the light conversion material 330.

[0309] Therefore, the second sealing part 520 can improve the adhesive property of the second sealing part due to the anchor effect, and thus can prevent the second sealing part from being peeled off.

[0310] Meanwhile, Figure 22 is an enlarged view of region A of Figure 18. Referring to Figure 22, one end in the first direction of at least one of the dam portion 600 and the first sealing portion 510 arranged in the 1-2 cutting portion h1-2 may be positioned to protrude further in the end direction of the second substrate than one end in the first direction of the second connecting region CA2.

[0311] For example, the distance between the end of the first sealing portion 510 and the end of the second substrate 120 in the first direction may be smaller than the distance between the end of the second connecting region CA2 and the end of the second substrate 120 in the first direction.

[0312] That is, the first width W1 between the end of the first sealing portion 510 defined as the open area OA and the end of the second substrate 120 in the first direction may be smaller than the second width W2 between the end of the electrode connecting portion 700 of the second connecting area CA2 and the end of the second substrate 120 in the first direction.

[0313] In this case, when the second substrate 120 includes a plurality of electrode connectors 700, the second width W2 may be defined as the width between the outermost electrode connector and the end of the second substrate 120 in the first direction.

[0314] In addition, a third width W3 between the first sealing portion 510 and the electrode connecting portion 710 disposed at the 1-2 cut portion h1-2 may be greater than the second width W2. This ensures a space for forming a dam portion between the first sealing portion 510 and the electrode connecting portion 700. As shown in FIG. 25 below, this prevents the light conversion material from flowing out to the third cut portion h3 for forming the electrode connecting portion and interfering with the movement of current between the second electrode 220 and the electrode connecting portion 700.

[0315] Meanwhile, FIG. 23 is an enlarged view of area B in FIG. 18. Referring to FIG. 23, a plurality of containers can be arranged in the open area OA.

[0316] In detail, the open area OA may have three or more, five or more, ten or more, fifteen or more, or twenty or more of the storage sections arranged therein.

[0317] The width W4 of the open area OA may be 100 μm or more, 300 μm or more, 600 μm or more, 800 μm or more, or 1,000 μm or more.

[0318] If the number of receiving portions in the open area OA is less than three or the width of the receiving portion is less than 100 μm, sufficient current and voltage may not be applied from the electrode connector to the light conversion material 330 inside the receiving portion 320 disposed between the first sealing portion 510 and the second sealing portion 520, resulting in reduced light conversion efficiency. Also, if the width of the open area OA is too small, disconnection may occur during manufacturing, resulting in reduced process efficiency.

[0319] In addition, one or more, two or more, three or more, four or more, or five or more receiving portions may contact the side of the first sealing portion 510 facing the open area. This is achieved by tilting the receiving portion 320, and since more light conversion material can be formed in the receiving portion closest to the open area among the plurality of receiving portions, the light conversion area can be further expanded. In the following FIG. 23, one receiving portion is illustrated as contacting the side of the first sealing portion 510 facing the open area, but as mentioned above, the number of contacting receiving portions is not limited to this.

[0320] Meanwhile, FIG. 24 is an enlarged view of region C in FIG. 18. Referring to FIG. 24, the receiving portion 320 may be inclined at a certain angle.

[0321] In detail, if the inclination angle θ1 of the accommodating portion is defined as the acute angle between the accommodating portion and an extension line of the first sealing portion 510 positioned at the 1-2 cutting portion h1-2, the inclination angle θ1 of the accommodating portion may be smaller than the acute angle θ2 between an imaginary line connecting the end of one side of the first direction of the 1-1 cutting portion h1-1 to the end of one side of the first direction of the 1-2 cutting portion h1-2 and the first sealing portion 510 positioned at the 1-2 cutting portion h1-2.

[0322] Therefore, the area of the receiving portions, which are not injected with the light conversion material due to the open regions, can be minimized. That is, the light conversion region of the light path controlling member can be increased only when the angle between the width of the open region in the first direction of the light path controlling member and the receiving portion is formed at an acute angle. That is, if the width of the open region in the first direction of the light path controlling member is formed at a right angle to the angle between the receiving portion and the receiving portion, the light conversion material may not be formed on the entire side of the substrate corresponding to the open region, and the light conversion region of the light path controlling member will be reduced.

[0323] For example, the inclination angle of the container can be 60° to 89°, 65° to 87°, or 75° to 85°.

[0324] Meanwhile, referring to FIG. 25, the receiving portion 320 may include a region where the light conversion material 330 is not included.

[0325] 25 is an enlarged view of region D in FIG. 18, and the light conversion material may not be disposed in the receiving portion, may be disposed in only a portion of the receiving portion, or may be disposed in only some of the receiving portions. That is, the receiving portion may also be formed outside the sealing portion, and by forming an area without the light conversion material in the receiving portion outside the sealing portion, an area that prevents the penetration of external impurities outside the sealing portion can be formed. This minimizes the penetration of external impurities into the light conversion material.

[0326] In the optical path control member according to the second embodiment, the receiving portion can be disposed so as to be inclined at an inclination angle of a certain size with respect to the second direction of the substrate.

[0327] This prevents the occurrence of moire when the light path control member and the display panel are combined to form a display device, due to the overlap of the receiving portion pattern of the light path control member and the pixel pattern of the display panel.

[0328] This makes it possible to prevent the pattern from being visible due to the moire phenomenon caused by the overlapping of the housing pattern of the light path control member and the pixel pattern of the display panel when a user views the display device from the outside.

[0329] Furthermore, in the light path controlling member according to the second embodiment, the container is disposed at an angle, thereby making it possible to prevent the light converting material from flowing out to the side surface of the light path controlling member.

[0330] That is, the first sealing portion and the second sealing portion are disposed at the ends of the light path control member in the first and second directions, thereby sealing the light conversion material inside the accommodating portion, thereby minimizing the leakage of the light conversion material to the outside or the penetration of external impurities into the light conversion material.

[0331] Furthermore, by forming a region where the sealing part and the light conversion material are mixed, the adhesive property of the sealing part can be improved by an anchor effect, thereby improving the adhesion of the sealing part and preventing peeling, thereby improving the reliability and sealing property of the light path control member.

[0332] Hereinafter, an optical path controlling member according to the third embodiment will be described with reference to FIGS.

[0333] In the description of the optical path control member according to the third embodiment, the description of the same or similar parts as those of the optical path control member according to the first embodiment will be omitted, and the same components will be given the same reference numerals.

[0334] 26 to 29, in the light path controlling member according to the third embodiment, the first protrusion portion PA1 and the second protrusion portion PA2 may be arranged to overlap each other. That is, unlike the first and second embodiments, the first protrusion portion PA1 and the second protrusion portion PA2 may be arranged to fully or partially overlap each other, rather than being arranged to be offset from each other.

[0335] Therefore, when manufacturing the optical path control member, alignment of the first substrate 110 and the second substrate 120 can be easily performed, thereby preventing defects due to tolerances that may occur during the process of bonding the first substrate and the second substrate, thereby improving process efficiency.

[0336] Fig. 30 is a diagram showing a cross-sectional view taken along the MM' region in Fig. 26. That is, Fig. 30 is a diagram showing a cross-sectional view taken along the second direction of the second connecting region CA2 arranged in the second protrusion portion PA2.

[0337] 30, a second connecting region CA2 may be disposed on the second protrusion PA2, and the third cut portion h3 may be formed in the second connecting region CA2. An electrode connector 700 including a conductive material may be disposed within the third cut portion h3.

[0338] The third cut portion h3 may penetrate the second substrate 120, the second electrode 220, and the buffer layer 420. In addition, the third cut portion h3 may partially penetrate the light conversion portion 300.

[0339] Therefore, the third cut portion h3 may be formed to expose the optical conversion unit 300. Therefore, the electrode connector 700 disposed within the third cut portion h3 may be spaced apart from the adhesive layer 410.

[0340] In addition, an insulating layer 750 may be disposed between the electrode connector 700 and the adhesive layer 410 inside the third cut portion h3.

[0341] When the electrode connector 700 and the adhesive layer 410 are spaced apart and an insulating layer 750 is disposed between the electrode connector 700 and the adhesive layer 410, the dielectric constant of the adhesive layer 410 can prevent the electrode connector 700 and the first electrode 210 from being electrically connected.

[0342] Therefore, restrictions on the selection of materials for the adhesive layer 410 can be reduced, and electrical shorts due to the dielectric constant of the adhesive layer 410 can be prevented, thereby improving the driving characteristics and reliability of the optical path controlling member.

[0343] In the optical path controlling member according to the third embodiment, the first protrusion of the first substrate and the second protrusion of the second substrate may be disposed to overlap each other.

[0344] This makes it possible to prevent defects due to the joining process in the process of manufacturing the optical path control member, thereby improving process efficiency.

[0345] In addition, the electrode connecting portion disposed inside the third cutting portion, which is the second connecting region, is separated from the adhesive layer, and an insulating layer is disposed between the electrode connecting portion and the adhesive layer, thereby preventing the electrode connecting portion and the first electrode from being electrically connected due to the dielectric constant of the adhesive layer.

[0346] Therefore, the material of the adhesive layer can be freely selected, and electrical short circuits due to the dielectric constant of the adhesive layer can be prevented, thereby improving the driving characteristics and reliability of the optical path control member.

[0347] An optical path controlling member according to the fourth embodiment will be described below with reference to FIGS.

[0348] In the description of the optical path control member according to the fourth embodiment, the description of the same or similar components as those of the optical path control members according to the first, second, and third embodiments will be omitted, and the same reference numerals will be used for the same components. In addition, the optical path control member according to the fourth embodiment can be applied in combination with the optical path control members according to the first, second, and third embodiments.

[0349] 31 to 39, the optical path control member according to the fourth embodiment may include a first substrate 110, a second substrate 120, a first electrode 210, a second electrode 220, and an optical conversion part 300. In the optical path control member according to the fourth embodiment, as shown in FIG.

[0350] Cut portions may be formed in the second substrate 120. In particular, the second substrate 120 may include a plurality of cut portions.

[0351] Referring to FIG. 31, the second substrate 120 may include a 1-1 cut portion h1-1, a 1-2 cut portion h1-2, a 2-1 cut portion h2-1, and a 2-2 cut portion h2-2.

[0352] The optical path control element of the fourth embodiment differs from the optical path control elements of the first to third embodiments described above in that the 2-1 cut portion h2-1 and the 2-2 cut portion h2-2 can be formed to a depth that exposes one surface of the insulating layer 410.

[0353] The light path control member may have a second sealing portion 520 disposed at an outermost portion thereof in the first direction 1A. Specifically, the second sealing portions 520 may be disposed at an outermost portion of the light path control member in the first direction 1A, extending in the second direction 2A and facing each other.

[0354] The second sealing portion 520 may be disposed inside the cutting portion. Specifically, the second sealing portion 520 may be disposed inside the 2-1 cutting portion h2-1 and the 2-2 cutting portion h2-2.

[0355] That is, the 2-1 cut portion h2-1 and the 2-2 cut portion h2-2 are formed by sequentially penetrating the second substrate 120, the second electrode 220, the buffer layer 420, and the light conversion unit 300 including the base portion 350 and the partition portion 310, and the second sealing portion 520 can be formed by disposing a sealing material inside the 2-1 cut portion h2-1 and the 2-2 cut portion h2-2.

[0356] That is, one side of the adhesive layer 410 is exposed through the 2-1 cutting portion h2-1 and the 2-2 cutting portion h2-2, and the second sealing portion 520 can be positioned in contact with the adhesive layer 410.

[0357] The second sealing portion 520 may be disposed in contact with a side surface of the second substrate 120. The second sealing portion 520 may be disposed in contact with a side surface of the second electrode 220. The second sealing portion 520 may be disposed in contact with a side surface of the buffer layer 420. The second sealing portion 520 may be disposed in contact with a side surface of the base portion 350. The second sealing portion 520 may be disposed in contact with a side surface of the partition wall portion 310.

[0358] The second sealing part 520 is disposed on a side of the light path control member, i.e., a side in the second direction 2A, and can prevent impurities that can penetrate from the outside from penetrating into the light conversion part 300.

[0359] The second sealing portion 520 may be disposed so as to completely fill the 2-1 cutting portion h2-1 and the 2-2 cutting portion h2-2, or may be disposed at a height lower than the depth of the 2-1 cutting portion h2-1 and the 2-2 cutting portion h2-2. Thus, as shown in FIGS. 5 and 6, the upper surface of the second sealing portion 520 may be disposed at a height lower than the upper surface of the second substrate 120. That is, a step may be formed between the upper surface of the second sealing portion 520 and the upper surface of the second substrate 120. The upper surface of the second sealing portion 520 may also be formed in a concave shape.

[0360] The 2-1 cut portion h2-1 and the 2-2 cut portion h2-2 may be disposed to have different lengths. Specifically, the length of the 2-2 cut portion h2-2 in the second direction 2A may be greater than the length of the 2-1 cut portion h2-1 in the second direction 2A.

[0361] The 2-2 cut portion h2-2 is disposed to extend to the second protrusion portion PA2 of the second substrate 120, so that the length of the 2-2 cut portion h2-2 can be longer than the length of the 2-1 cut portion h2-1.

[0362] Accordingly, the lengths of the second sealing portion 520 disposed inside the 2-1 cutting portion h2-1 and the 2-2 cutting portion h2-2 may also vary. That is, the length of the second sealing portion 520 disposed inside the 2-2 cutting portion h2-2 may be longer than the length of the second sealing portion 520 disposed in the 2-1 cutting portion h2-1.

[0363] A first sealing portion and a second sealing portion may be disposed inside the first cutting portion, the first cutting portion, the second cutting portion, and the second cutting portion, respectively.

[0364] The first sealing portion and the second sealing portion are arranged to seal the inlet and outlet portions of the container that contains the light conversion material, and may be arranged to extend along the side area of the light conversion portion, i.e., the side area in the first direction.

[0365] As a result, the first sealing portion can prevent the light conversion material inside the accommodating portion from leaking out to the outside of the light conversion portion, and the first sealing portion and the second sealing portion can prevent impurities from penetrating into the inside of the light conversion portion from the outside, thereby improving the reliability of the light path control member.

[0366] Furthermore, since the first sealing portion and the second sealing portion are disposed inside the cut portion formed on the second substrate, the size of the optical path control member can be reduced compared to when the first sealing portion and the second sealing portion are formed outside the optical conversion portion, and the material of the sealing portion can be prevented from being altered by the external environment, thereby improving the sealing characteristics of the optical path control member.

[0367] Figures 38 to 42 are diagrams showing various cross-sectional views taken along the R-R' region of Figure 31. That is, Figures 38 to 42 are diagrams showing cross-sectional views taken along the protruding portion regions of the first and second substrates.

[0368] 38 to 42, the first protrusion portion PA1 of the first substrate 110 and the second protrusion portion PA2 of the second substrate 120 may be spaced apart from each other. That is, the first protrusion portion PA1 of the first substrate 110 and the second protrusion portion PA2 of the second substrate 120 may be spaced apart from each other in the first direction 1A.

[0369] This physically separates the first connecting region CA1 arranged on the first protrusion PA1 from the second connecting region CA2 arranged on the second protrusion PA2, thereby preventing the first connecting region CA1 and the second connecting region CA2 from being electrically connected.

[0370] The first connection region CA1 may be disposed on the first protrusion portion PA1. The first electrode 210 may be exposed in the first connection region CA1. That is, the adhesive layer 410 on the first protrusion portion PA1 may be partially removed to expose the first electrode 210 on the first substrate 110, thereby exposing the top surface of the first electrode 210 in the first connection region CA1. That is, the first electrode 210 exposed in the first connection region CA1 may become a first connection electrode that is connected to an external printed circuit board or a flexible printed circuit board.

[0371] In addition, a second connecting region CA2 may be disposed on the second protrusion PA2. A third cut portion h3 may be formed in the second connecting region CA2. Specifically, a plurality of third cut portions h3 may be formed in the second connecting region CA2. More specifically, a plurality of the third cut portions h3 may be formed in the second connecting region CA2 and spaced apart from each other.

[0372] The first connection region CA1 and the second connection region CA2 may be arranged on the same plane, so that when the same printed circuit board is connected to the first connection region CA1 and the second connection region CA2, the first connection region CA1, the second connection region CA2, and the printed circuit board can be easily connected because the first connection region CA1 and the second connection region CA2 are arranged on the same plane.

[0373] Although Figures 38 to 41 show only six third cut portions h3 spaced apart from one another, the embodiment is not limited thereto, and the third cut portions h3 may be formed in less than six or more than six.

[0374] An electrode connector 700 including a conductive material may be disposed inside the third cut portion h3.

[0375] The electrode connector 700 may include a different material from at least one of the first electrode 210 and the second electrode 220. In addition, the light transmittance of the electrode connector 700 may be lower than the light transmittance of at least one of the first electrode 210 and the second electrode 220.

[0376] For example, the electrode connector 700 may include a metal. In particular, the electrode connector 700 may include a metal paste in which metal particles are dispersed in a binder.

[0377] The electrode connecting unit 700 may be disposed in contact with a side surface of the second substrate 120 within the third cut portion h3. The electrode connecting unit 700 may be disposed in contact with a side surface of the second electrode 220 within the third cut portion h3. The electrode connecting unit 700 may be disposed in contact with a side surface of the buffer layer 420 within the third cut portion h3. The electrode connecting unit 700 may be disposed in contact with a side surface of the base portion 350 within the third cut portion h3. The electrode connecting unit 700 may be disposed in contact with a side surface of the partition wall unit 310 within the third cut portion h3.

[0378] That is, the electrode connector 700 may be disposed in contact with at least one side of the second substrate 120 , the second electrode 220 , the buffer layer 420 , the base 350 , and the partition 310 .

[0379] For example, referring to FIG. 38, the third cut portion h3 may be formed to penetrate through the second substrate 120, the second electrode 220, the buffer layer 420, the base portion 350, and the partition portion 310.

[0380] As a result, the electrode connector 700 may be positioned within the third cut portion h3 in contact with the side of the second substrate 120, the side of the second electrode 220, the side of the buffer layer 420, the side of the base portion 350, and the side of the partition portion 310.

[0381] 39, the third cut portion h3 may be formed through the second substrate 120, the second electrode 220, the buffer layer 420, and the base portion 350. That is, the third cut portion h3 may not be formed in the partition portion 310, or may be formed by removing only a portion of the partition portion 310.

[0382] As a result, the electrode connector 700 may be positioned within the third cut portion h3 in contact with the side of the second substrate 120, the side of the second electrode 220, the side of the buffer layer 420, and the side of the base portion 350.

[0383] The upper surface of the electrode connector 700 may be flush with or lower than the upper surface of the second substrate 120. For example, the upper surface of the electrode connector 700 may be flush with the upper surface of the second substrate 120. Alternatively, as shown in FIG. 8, the upper surface of the electrode connector 700 may be lower than the upper surface of the second substrate 120.

[0384] Accordingly, the upper surface of the electrode connector 700 and the upper surface of the second substrate 120 may be formed on the same plane without any step, or may be arranged with a step such that the upper surface of the electrode connector 700 is lower.

[0385] Therefore, the overall thickness of the light path controlling member can be reduced by preventing the overall thickness of the light path controlling member from increasing due to the height of the electrode connector 700 .

[0386] The electrode connecting part 700 may be electrically connected to the second electrode 220 and exposed to the outside of the second substrate 120. That is, the electrode connecting part 700 may be exposed to the second protrusion part PA2 of the second substrate 120. That is, the upper surface of the electrode connecting part 700 may be exposed to the second connection area CA2.

[0387] Therefore, the electrode connecting part 700 exposed in the second connecting area CA2 may become a second connecting electrode connected to an external printed circuit board or a flexible printed circuit board.

[0388] Thus, the first electrode 210 and the second electrode 220 may be electrically connected to the same printed circuit board or flexible printed circuit board via the first connecting electrode in the first connecting region and the second connecting electrode in the second connecting region, respectively.

[0389] Alternatively, the first electrode 210 and the second electrode 220 may be electrically connected to another printed circuit board or a flexible printed circuit board via a first connecting electrode in a first connecting region and a second connecting electrode in a second connecting region, respectively. That is, the first connecting electrode may be connected to a first circuit board, and the second connecting electrode may be connected to a second circuit board different from the first circuit board.

[0390] Since the electrode connecting part 700 is disposed within a plurality of third cut parts rather than one cut part, it is possible to increase the contact area between the electrode connecting part 700 and the second electrode 220. As a result, the increased contact area between the electrode connecting part and the second electrode can improve the electrical connection characteristics of the second electrode, the electrode connecting part, and the printed circuit board.

[0391] Meanwhile, referring to FIG. 40, the third cut portion h3 may include a 3-1 cut portion h3-1 and a 3-2 cut portion h3-2 depending on whether the conductive material is disposed.

[0392] In detail, the third cut portion h3 may include a 3-1 cut portion h3-1 where the conductive material is disposed and a 3-2 cut portion h3-2 where the conductive material is not disposed.

[0393] The 3-1 cut portion h3-1 where the conductive material is disposed may become the electrode connector 700. The 3-2 cut portion h3-2 where the conductive material is not disposed may become the dummy portion 710. In FIG. 40, the 3-2 cut portion h3-2 is defined as a region where the conductive material is not disposed, but an embodiment is not limited thereto, and the 3-2 cut portion h3-2 may be defined as a region where the conductive material is partially disposed.

[0394] That is, at least one of the third cut portions h3 may not have a conductive material disposed therein, and the second connection region CA may include a dummy portion 710 that does not have conductivity.

[0395] Since the second connection region CA2 includes the dummy portion 710, the printed circuit board may not be connected to the area of the plurality of third cut portions that is not filled with the conductive material or is filled with a small amount of conductive material, thereby improving the electrical connection characteristics between the second connection region CA2 and the printed circuit board.

[0396] Furthermore, when the dummy portions 710 are disposed at both ends of the second connection region CA2, the position of the second connection region CA2 can be easily identified from the outside, and connection defects due to alignment tolerances can be minimized when connecting the second connection region CA2 to a printed circuit board.

[0397] 41, a merging portion 720 may be disposed on the electrode connecting portion 700. In particular, the merging portion 720 may be disposed on the electrode connecting portion 700, and may be connected to the electrode connecting portions 700 disposed at the plurality of third cut portions h3.

[0398] The merging part 720 may include the same or similar conductive material as the electrode connecting part 700 .

[0399] The merging portion 720 facilitates connection between the electrode connecting portion 700 and the printed circuit board. That is, when connecting the electrode connecting portions disposed inside the plurality of third cut portions to the printed circuit board, connection failures due to alignment tolerances can be prevented. That is, it is possible to prevent the electrode connecting portions disposed inside some of the plurality of third cut portions from being disconnected from the printed circuit board due to misalignment between the electrode connecting portions and the printed circuit board.

[0400] Therefore, the merging portion can facilitate the connection between the electrode connector 700 and the printed circuit board, thereby improving the electrical connection characteristics.

[0401] 42, the merging portion 720 may be disposed inside the second substrate 120. That is, the merging portion 720 may be disposed embedded inside the second substrate 120.

[0402] That is, the groove g in which the joining portion 720 is to be disposed may be formed first in the second substrate 120, and the third cutting portion h3 may be disposed below the groove g.

[0403] The merging portion 720 may be disposed to be completely embedded within the second substrate 120 or may be disposed to be partially protruded from the upper surface of the second substrate 120 .

[0404] As a result, the increase in thickness of the optical path control member due to the merging portion 720 can be minimized, and the merging portion 720 is safely supported inside the second substrate 120, thereby improving the reliability of the optical path control member.

[0405] In the optical path control member of the fourth embodiment, the first connecting electrode of the first connecting region and the second connecting electrode of the second connecting region can be arranged on first protrusions and second protrusions formed on the first substrate and the second substrate.

[0406] The first and second protrusions may protrude only to an area where the first connecting region and the second connecting electrode can be formed, without protruding from the entire surfaces of the first and second substrates.

[0407] This reduces the areas of the first and second protrusions, and therefore, when the light path control member is combined with a display panel or the like to be applied to a display device, other components of the display device can be disposed in areas not corresponding to the first and second protrusions, thereby reducing the bezel area of the display device.

[0408] That is, the light path control member according to the fourth embodiment reduces the size of the bezel area where the connecting electrodes are arranged, and thus the bezel area of the display device to which the light path control member is applied can also be reduced.

[0409] Fig. 43 is a diagram showing a cross-sectional view taken along the S-S' region in Fig. 31. That is, Fig. 43 is a diagram showing a cross-sectional view taken along both ends of the 2-2 cut portion in the second direction.

[0410] Referring to FIG. 43, the 2-2 cut portion h2-2 may be disposed to extend from the second protrusion portion PA2 of the second substrate 120 in the second direction 2A.

[0411] Referring to FIG. 43, the 1-1 cut portion h1-1 and the 2-2 cut portion h2-2 may be connected to each other.

[0412] Since the 1-1 cutting portion h1-1 and the 2-2 cutting portion h2-2 are connected, the first sealing portion 510 arranged in the 1-1 cutting portion h1-1 and the second sealing portion 520 arranged in the 2-2 cutting portion h2-2 can be arranged to be connected to each other.

[0413] Meanwhile, in the drawings, the 2-2 cut portion h2-2 is shown to be disposed apart from the end, i.e., outer surface, of the second substrate 120 in the first direction 1A, but the embodiment is not limited thereto and may be formed by removing one outer surface of the second substrate 120 in the first direction 1A, like the 1-1 cut portion h1-1 described above. As a result, one outer surface of the second substrate 120 in the first direction 1A may be the outermost surface of the second substrate 120, with a portion of the 2-2 cut portion h2-2.

[0414] Figure 44 is a diagram showing a cross-sectional view cut along the T-T' region of Figure 31, and Figure 45 is a diagram showing a cross-sectional view cut along the U-U' region of Figure 31, i.e., Figures 44 and 45 are diagrams showing cross-sectional views of the second connecting region CA2 arranged in the second protrusion portion PA2 cut in the second direction.

[0415] 44 and 45, the second connecting region CA2 may include an overlapping region with the first sealing portion 510 and a non-overlapping region.

[0416] That is, since the 1-2 cutting portion h1-2 and the 2-2 cutting portion h2-2 are arranged spaced apart from each other, the second connecting area CA2 can be arranged in an area overlapping with the open area OA in the second direction and in an area overlapping with the first sealing portion 510 arranged inside the 1-2 cutting portion h1-2.

[0417] 45, a dam portion 600 may be disposed in the second connecting region CA2, i.e., between the electrode connecting portion 700 and the first sealing portion 510. That is, the dam portion 600 may be disposed on the second protrusion portion PA2 between the electrode connecting portion 700 and the first sealing portion 510.

[0418] The dam unit 600 may be formed by filling a cut portion that penetrates the second substrate 120, the second electrode 220, the buffer layer 410, and the light conversion unit 300 with a material that forms a dam.

[0419] The dam portion 600 is a material that controls the injection length of the light conversion material 330 when the light conversion material 330 is injected into the receiving portion 320, and the dam portion 600 can prevent the light conversion material 330 from overflowing toward the outside of the dam, i.e., toward the electrode connecting portion 700.

[0420] The dam portion 600 may be partially removed during the manufacturing process of the light path control member, and partially remain in the region adjacent to the second connection region CA2.

[0421] Meanwhile, referring to FIG. 45, although the light conversion unit 300 is shown to remain between the electrode connector 700 and the dam unit 600, the embodiment is not limited thereto.

[0422] That is, when the light conversion unit 300 between the electrode connecting unit 700 and the dam unit 600 is in the partition unit 310 region, the light conversion unit 300, the buffer layer 420, the second electrode 220, and the second substrate 120 may remain between the electrode connecting unit 700 and the dam unit 600, as shown in FIG. 35.

[0423] However, if the light conversion unit 300 between the electrode connector 700 and the dam unit 600 is in the receiving unit 320 area, the material of the dam unit 600 may move into the receiving unit 320, causing the dam unit 600 and the electrode connector 700 to come into contact with each other.

[0424] Furthermore, referring to FIG. 45, although the light converting unit 300 is shown to remain between the dam unit 600 and the first sealing unit 510, the embodiment is not limited thereto.

[0425] That is, when the light conversion unit 300 between the dam unit 600 and the first sealing unit 510 is the partition unit 310 area, the light conversion unit 300, the buffer layer 420, the second electrode 220, and the second substrate 120 may remain between the dam unit 600 and the first sealing unit 510 as shown in FIG. 12.

[0426] However, if the light conversion unit 300 between the dam unit 600 and the first sealing unit 510 is in the receiving unit 320 area, the material of the first sealing unit 510 and the dam unit 600 may move into the receiving unit 320, causing the first sealing unit 510 and the dam unit 600 to come into contact with each other.

[0427] Hereinafter, an optical path control module according to an embodiment will be described with reference to FIG.

[0428] Referring to FIG. 46, an optical path control module according to an embodiment includes the optical path control member described above and a flexible printed circuit board (FPCB) electrically connected to the optical path control member.

[0429] Referring to FIG. 46, the flexible printed circuit board 900 may include a substrate 910 and a wiring electrode 920 disposed on the substrate 910 .

[0430] The wiring electrode 920 may include a first wiring electrode 921 and a second wiring electrode 922 .

[0431] The first wiring electrode 921 and the second wiring electrode 922 may be disposed on the same substrate 910. For example, the first wiring electrode 921 and the second wiring electrode 922 may be disposed on the same surface of the substrate 910.

[0432] The first wiring electrode 921 may be connected to the first electrode 210 of the light path controlling member, and the second wiring electrode 922 may be connected to the second electrode 220 of the light path controlling member, thereby electrically connecting the light path controlling member and the flexible printed circuit board.

[0433] The first electrode 210 and the second electrode 220 of the light path control member may be disposed on the same plane.

[0434] That is, the first electrode 210 is disposed on the upper surface of the first substrate 110, and a plurality of cut portions are formed on the second substrate 120, and the second electrode 220 is disposed on the upper surface of the second substrate 120 via an electrode connecting portion connected to the second electrode 220, so that the first electrode 210 and the second electrode 220 can be disposed on the same surface of the light path control member.

[0435] Thus, the optical path control member and the flexible printed circuit board may be electrically connected on one surface via the flexible printed circuit board.

[0436] Conventionally, the first electrode and the second electrode are arranged in different directions and connected via two printed circuit boards, which increases the bezel area of the optical path control module, or the first electrode and the second electrode are arranged on different surfaces, which makes it difficult to connect the electrodes to a flexible printed circuit board.

[0437] However, in the optical path control module according to the embodiment, the first electrode and the second electrode are arranged on the same surface of the optical path control member, and are thereby connected to each other on the same surface using a single flexible printed circuit board, thereby facilitating connection between the optical path control member and the flexible printed circuit board while reducing the bezel area of the optical path control module.

[0438] Hereinafter, a method for manufacturing an optical path controlling member according to an embodiment will be described with reference to Figures 47 to 64. In the description of the method for manufacturing an optical path controlling member according to an embodiment, descriptions that are the same as or similar to those of the optical path controlling member according to the above-described embodiment will be omitted, and the same components will be given the same reference numerals.

[0439] 47 and 48, the first substrate 110 and the second substrate 120 may be bonded to each other via the adhesive layer 410. That is, the first substrate 110 and the second substrate 120 may be bonded to each other such that the second substrate 120 is disposed on the first substrate 110.

[0440] Accordingly, one surface of the adhesive layer 410 may be exposed to the first hole H1, the second hole H2, the third cut portion h3, and the first protrusion PA1 formed in the second substrate 120.

[0441] 49 and 50, the dam portion 600 may be formed by filling the second hole H2 with a material for forming the dam portion 600.

[0442] The dam portion 600 may be partially or entirely filled along the receiving portion 320 up to the region between the first hole H1 and the second hole H2.

[0443] The dam portion 600 may include polyurethane acrylate, but the embodiment is not limited thereto.

[0444] 51 and 52, a light converting material 330 including light converting particles 330a and a dispersion liquid 330b may be injected into the receiving portion 320 through the first hole H1, thereby filling the receiving portion 320, the first hole H1, and the second hole H2 with the light converting material 330.

[0445] The receiving portion 320 is disposed at a certain inclination angle with respect to the second direction 2A, so that the light conversion material 330 can also be filled at a certain inclination angle.

[0446] For example, one of the opposing first holes H1 may be designated as an injection port and the other as an outlet port, and then the light conversion material may be dispensed into the injection port, and then the light conversion material may be sucked into the outlet port using a capillary method to fill the inside of the receiving portion 320.

[0447] 53 and 54, a first sealing portion 510 may be formed by filling the first hole H1 and the second hole H2 with a sealing material.

[0448] The first sealing portion 510 may include the same material as the dam portion 600, but the embodiment is not limited thereto.

[0449] Meanwhile, in order to easily fill the inside of the first hole H1 with the sealing material, a process (e.g., a cleaning process) may be additionally performed to clean the inside of the first hole H1 to form an injection path for the sealing material before filling the first hole H1 with the sealing material.

[0450] Meanwhile, the first sealing part 510 may be disposed inside the first hole H1 and the second hole H2 and may partially move into the receiving part 320. Thus, the light conversion material 510 and the sealing material may be disposed together inside the receiving part 320.

[0451] Next, referring to FIG. 55, the third cut portion h3 may be filled with a conductive material to form the electrode connector 700 of the second substrate 120.

[0452] The electrode connector 700 may be disposed in contact with the second electrode 220 within the third cut portion h3, and may serve as a second connecting electrode connected to a printed circuit board.

[0453] 56 to 59, a fourth hole H4 and a fifth hole H5 may be further formed. Specifically, the fourth hole H4 and the fifth hole H5 may be formed extending in the second direction on the second substrate 120. That is, at least one of the fourth hole H4 and the fifth hole H5 may be formed by irradiating a laser from the second substrate 120 toward the first substrate 110.

[0454] At least one of the fourth hole H4 and the fifth hole H5 may be disposed to overlap the first hole H1 and the second hole H2.

[0455] As shown in Figure 62 below, when a cutting process is performed to minimize the bezel of the display or the optical path control unit, only one of the fourth hole H4 and the fifth hole H5 can be formed to prevent ink from leaking out of the accommodating portion exposed to the side.

[0456] Alternatively, the fourth hole or the fifth hole may not be formed. After the cutting process, the ink in the container, whose side is exposed, may not flow out of the light path control member due to the pressure difference between the air pressure inside the container and the air pressure outside the light path control member, while the other side is sealed by the first sealing part.

[0457] However, since reliability may decrease when multiple modes are converted, the mode conversion reliability of the overall optical path control member can be improved by forming the fourth or fifth hole and sealing the side surface of the optical path control member as well.

[0458] Referring to FIGS. 57 to 60, the fourth hole H4 and the fifth hole H5 may be formed to various depths.

[0459] For example, referring to FIG. 57, the fourth hole H4 and the fifth hole H5 may be formed by passing through the second substrate 120, the second electrode 220, and the buffer layer 420 and removing a portion of the light conversion part 300.

[0460] Alternatively, referring to FIG. 58, the fourth hole H4 and the fifth hole H5 may be formed through the second substrate 120, the second electrode 220, the buffer layer 420, and the light conversion part 300.

[0461] Alternatively, referring to FIG. 59, the fourth hole H4 and the fifth hole H5 may be formed by penetrating 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 and removing a portion of the first substrate 110.

[0462] Although the fourth hole H4 and the fifth hole H5 are shown to be formed to the same depth in the drawings, the embodiment is not limited thereto, and the fourth hole H4 and the fifth hole H5 may be formed to different depths.

[0463] 60 and 61, the second sealing portion 520 may be formed by disposing a sealing material inside the fourth hole H4 and the fifth hole H5.

[0464] The second sealing portion 520 may include the same material as the dam portion 600 and the first sealing portion 510 described above, but embodiments are not limited thereto.

[0465] Next, referring to FIGS. 62 and 63, by cutting along the dashed line direction in FIG. 62, the light path controlling component of FIG. 63 can finally be manufactured.

[0466] Meanwhile, referring to FIG. 64, by arranging the cutting lines at various positions, the outer surface of the light path control member can be formed into various shapes.

[0467] As a result, the area of the receiving portion in the light path control member where the light conversion material is formed can be freely set to 10% or more, 20% or more, 25% or more, 30% or more, 40% or more, or 50% or more of the area of the second substrate. Furthermore, the area of the receiving portion in which the light conversion material is formed can be adjusted to 10% to 60%, 20% to 50%, or 20% to 40%. This allows the front transmittance and side transmittance of the light path control member to be adjusted within a desired range. Furthermore, the bezel area of a display panel equipped with the light path control member can be reduced, thereby ensuring an area for mounting other components required for the display panel.

[0468] Hereinafter, a display device and a display apparatus to which an optical path controlling member according to an embodiment is applied will be described with reference to FIGS.

[0469] 65 and 66, the light path control member 1000 according to the embodiment can be disposed above or below the display panel 2000.

[0470] The display panel 2000 and the light path controlling member 1000 may be disposed by adhering to each other. For example, the display panel 2000 and the light path controlling member 1000 may be adhered to each other via an adhesive member 1500. The adhesive member 1500 may be transparent. For example, the adhesive member 1500 may include an adhesive or an adhesive layer including an optically transparent adhesive material.

[0471] The adhesive member 1500 may include a release film. In particular, when adhering the light path member and the display panel, the release film may be removed before adhering the light path control member and the display panel.

[0472] The display panel 2000 may include a first' substrate 2100 and a second' substrate 2200. When the display panel 2000 is a liquid crystal display panel, the light path control member may be formed under the liquid crystal panel. That is, when the surface of the liquid crystal panel that a user views is defined as the top of the liquid crystal panel, the light path control member may be disposed under the liquid crystal panel. The display panel 2000 may have a structure in which a first' substrate 2100 including thin film transistors (TFTs) and pixel electrodes and a second' substrate 2200 including a color filter layer are bonded together with a liquid crystal layer sandwiched therebetween.

[0473] The display panel 2000 may be a liquid crystal display panel having a color filter on transistor (COT) structure in which thin film transistors, color filters, and a black electrolyte are formed on a first substrate 2100, and a second substrate 2200 is bonded to the first substrate 2100 with a liquid crystal layer sandwiched therebetween. That is, thin film transistors may be formed on the first substrate 2100, a protective layer may be formed on the thin film transistors, and a color filter layer may be formed on the protective layer. Also, pixel electrodes in contact with the thin film transistors may be formed on the first substrate 2100. In this case, the black electrolyte may be omitted to improve the aperture ratio and simplify the mask process, and the common electrode may be formed to serve as the black electrolyte.

[0474] In addition, when the display panel 2000 is a liquid crystal display panel, the display device may further include a backlight unit 3000 that provides light to the rear surface of the display panel 2000 .

[0475] That is, as shown in FIG. 65, the light path control member may be disposed below the liquid crystal panel and above the backlight unit 3000, and the light path control member may be disposed between the backlight unit 3000 and the display panel 2000.

[0476] Alternatively, as shown in FIG. 66, when the display panel 2000 is an organic light emitting diode (OLED) panel, the light path control member may be formed on the top of the OLED panel. That is, when the surface of the OLED panel that a user views is defined as the top of the OLED panel, the light path control member may be disposed on the top of the OLED panel. The display panel 2000 may include a self-emitting element that does not require a separate light source. The display panel 2000 may include a first substrate 2100 on which a thin film transistor is formed, and an organic light emitting element in contact with the thin film transistor is formed. The organic light emitting element may include a positive electrode, a negative electrode, and an organic light emitting layer formed between the positive electrode and the negative electrode. The display panel 2000 may further include a second substrate 2200 on the organic light emitting element, serving as an encapsulation substrate for encapsulation.

[0477] Although not shown in the drawings, a polarizer may be further disposed between the light path control member 1000 and the display panel 2000. The polarizer may be a linear polarizer or an external light reflection preventing polarizer. For example, when the display panel 2000 is a liquid crystal display panel, the polarizer may be a linear polarizer. Also, when the display panel 2000 is an organic light emitting diode panel, the polarizer may be an external light reflection preventing polarizer.

[0478] An additional functional layer 1300, such as an anti-reflection layer or an anti-glare layer, may be further disposed on the light path controlling member 1000. In particular, the functional layer 1300 may be bonded to one surface of the first substrate 110 of the light path controlling member. Although not shown in the drawings, the functional layer 1300 may be bonded to the first substrate 110 of the light path controlling member via an adhesive layer. A release film for protecting the functional layer 1300 may also be disposed on the functional layer 1300.

[0479] A touch panel may be further disposed between the display panel and the light path control member.

[0480] Although the drawings show the light path control member being disposed on the top of the display panel, the embodiment is not limited thereto, and the light control member may be disposed in various positions where light can be adjusted, such as the bottom of the display panel or between the second substrate and the first substrate of the display panel.

[0481] In addition, although the optical conversion parts of the optical path control member according to the embodiment are shown parallel or perpendicular to the outer surface of the second substrate in the drawings, the optical conversion parts may be formed at an angle to the outer surface of the second substrate, thereby reducing the moire phenomenon occurring between the display panel and the optical path control member.

[0482] 67 to 69, the light path controlling member according to the embodiment can be applied to various display devices.

[0483] 67 to 69, the light path controlling member according to the embodiment can be applied to a display device that displays a display.

[0484] For example, when power is applied to the optical path control element as shown in FIG. 67, the receiving portion functions as a light-transmitting portion and the display device can be driven in a light-blocking mode, and when power is not applied to the optical path control element as shown in FIG. 68, the receiving portion functions as a light-blocking portion and the display device can be driven in a light-blocking mode.

[0485] This allows the user to easily drive the display device into the privacy mode or the general mode by applying power.

[0486] Light emitted from the backlight unit or the self-luminous elements may travel from the first substrate toward the second substrate, or from the second substrate toward the first substrate.

[0487] Furthermore, referring to FIG. 69, a display device to which the light path control member according to the embodiment is applied can also be applied to the interior of a vehicle.

[0488] For example, a display device including an optical path control member according to an embodiment may display vehicle information and an image for checking a vehicle's travel route. The display device may be disposed between a driver's seat and a passenger seat of a vehicle.

[0489] Furthermore, the optical path control member according to the embodiment may be applied to an instrument panel that displays vehicle speed, engine speed, warning signals, and the like.

[0490] Furthermore, the light path controlling member according to the embodiment can be applied to the front glass (FG) or the left and right window glasses of a vehicle.

[0491] The features, structures, effects, etc. described in the above-described embodiments are included in at least one embodiment of the present invention and are not necessarily limited to only one embodiment. Furthermore, the features, structures, effects, etc. exemplified in each embodiment can be combined or modified in other embodiments by a person skilled in the art to which the embodiment belongs. Therefore, content related to such combinations and modifications should be interpreted as being included within the scope of the present invention.

[0492] Furthermore, although the above description has focused on the embodiments, these are merely examples and are not intended to limit the present invention. Those skilled in the art will recognize that various modifications and applications not exemplified above are possible within the scope of the essential characteristics of the present invention. For example, each component specifically illustrated in the embodiments can be modified and implemented. Differences related to such modifications and applications should be construed as being included within the scope of the present invention as defined by the appended claims.

Claims

1. a first substrate having a first direction and a second direction defined thereon; a first electrode disposed on the first substrate; a second substrate disposed on the first substrate, the second substrate defining the first direction and the second direction; a second electrode disposed below the second substrate; a light conversion unit disposed between the first electrode and the second electrode, the second substrate and the second electrode include a cut portion penetrating the second substrate and the second electrode, The cutting portion is a first-1 cutting portion and a first-2 cutting portion disposed opposite to each other in the second direction; a second-1 cutting portion and a second-2 cutting portion disposed opposite to each other in the first direction, an open region formed by separating the first-2 cut portion and the second-2 cut portion, the open region being a region where no sealing material is disposed, a first sealing portion disposed in the first-1 cut portion and the first-2 cut portion, a second sealing portion disposed inside the second-1 cut portion and the second-2 cut portion, and the light conversion portion including a plurality of partition portions, a plurality of receiving portions, and a base portion; a light conversion material including electrophoretic particles and a dispersion liquid is disposed inside the container; The light path control member, wherein the light conversion material is in contact with at least one of the first sealing portion and the second sealing portion.

2. further including a buffer layer disposed between the second electrode and the light conversion unit; 2. The optical path control element according to claim 1, wherein at least one of the first-1 cut portion, the first-2 cut portion, the second-1 cut portion, and the second-2 cut portion penetrates the buffer layer and the base portion.

3. further including an adhesive layer disposed between the first electrode and the light conversion unit; The optical path control member of claim 2 , wherein at least one of the first sealing portion and the second sealing portion is disposed in direct contact with the adhesive layer.

4. 2. The optical path control member of claim 1, wherein at least one of the plurality of accommodating portions is in contact with the first sealing portion, and at least one of the plurality of accommodating portions is in contact with the first sealing portion and the second sealing portion.

5. The optical path control member according to claim 1 , wherein the housing portion extends in a direction different from the second direction.

6. the first substrate includes a first protrusion; the second substrate includes a second protrusion, The optical path control member according to claim 1 , further comprising a dam portion disposed on the first protrusion.

7. the first electrode is exposed to the first protrusion; 7. The optical path control member of claim 6, wherein the second protrusion has a third cut portion formed therein that penetrates the second substrate and the second electrode, and an electrode connecting portion that connects to a side surface of the second electrode is disposed inside the third cut portion.

8. The optical path control member of claim 7 , wherein the dam portion is disposed between the electrode connecting portion and the first sealing portion.

9. The light path control member of claim 7 , wherein the electrode connector includes a material different from that of at least one of the first electrode and the second electrode.

10. The optical path control member according to claim 8 , further comprising an adhesive layer disposed between the first electrode and the optical conversion portion.

11. The optical path controlling member of claim 10 , further comprising an insulating layer disposed between the electrode connector and the adhesive layer.

12. The optical path control member of claim 6 , wherein a first mixed region containing both the material of the first sealing portion and the material of the dam portion is disposed between the first sealing portion and the dam portion.

13. The light path control member of claim 1 , wherein at least one of the plurality of receiving portions includes a second mixed region containing both the light conversion material and the material of the second sealing portion.

14. The light path control member of claim 1 , further comprising a third mixed region between the second sealing portion and the light conversion material, the third mixed region including both the light conversion material and the material of the second sealing portion.

15. 2. The optical path control member according to claim 1, wherein the depths of the first-1 cutting region and the first-2 cutting region are different from the depths of the second-1 cutting region and the second-2 cutting region.

16. 2. The optical path control member according to claim 1, wherein the lengths of the second-1 cutting region and the second-2 cutting region in the second direction are different from each other.

17. the first-first cutting unit is connected to the second-first cutting unit and the second-second cutting unit; The first-second cutting section is connected to the second-first cutting section, the 2-1 cutting unit is connected to the 1-1 cutting unit and the 1-2 cutting unit; The optical path control member of claim 1 , wherein the second-2 cutting portion is connected to the first-1 cutting portion.

18. A display device comprising: a panel including at least one of a display panel and a touch panel; and the light path control member according to any one of claims 1 to 9, arranged above or below the panel.

19. the panel includes a backlight unit and a liquid crystal display panel; the light path control member is disposed between the backlight unit and the liquid crystal display panel, The display device of claim 18, wherein light emitted from the backlight unit travels from the first substrate toward the second substrate.

20. the panel includes an organic light emitting diode panel; the light path control member is disposed on the organic light emitting diode panel; The display device of claim 18 , wherein light emitted from the panel travels from the first substrate toward the second substrate.

Images