KR20210147612A - Light route control member and display having the same - Google Patents

Abstract

According to an embodiment of the present invention, an optical path control member includes: a first substrate; a first electrode arranged on the first substrate; a second substrate arranged on the first substrate; a second electrode arranged under the second substrate; and an optical conversion unit arranged between the first electrode and the second electrode, wherein the optical conversion unit includes a partitioning part and an accommodation part which are alternately arranged, an optical conversion material for changing the transmittance of light is filled inside the accommodation part, the optical conversion material includes a solvent, optical conversion particles, and a liquid crystal, and the liquid crystal is included in an amount of 1 wt% to 10 wt% based on the entire optical conversion material. The present invention provides the optical path control member having an improved front luminance.

Description

A light path control member and a display device including the same

Embodiments relate to a light path control member and a display device including the same.

The light-shielding film blocks the transmission of light from the light source. It is attached to the front of the display panel, which is a display device used for mobile phones, laptops, tablet PCs, vehicle navigation, and vehicle touch, and the angle of incidence of light when the display transmits the screen. Accordingly, it is used for the purpose of expressing clear image quality at the required viewing angle by adjusting the viewing angle of the light.

In addition, the light-shielding film is used for a window of a vehicle or a building to partially block external light to prevent glare or to prevent the inside from being seen from the outside.

That is, the light blocking film may be a light path control member that controls a movement path of light to block light in a specific direction and transmit light in a specific direction. Accordingly, by controlling the light transmission angle by the light-shielding film, it is possible to control the viewing angle of the user.

On the other hand, such a light-shielding film is a light-shielding film that can always control the viewing angle regardless of the surrounding environment or the user's environment, and a switchable light-shielding film that allows the user to turn on/off the viewing angle control according to the surrounding environment or the user's environment. can be distinguished.

Such a switchable light blocking film may be implemented by filling the inside of the pattern part with particles that can move according to the application of voltage and a dispersion liquid for dispersing them, and the pattern part is changed into a light transmitting part and a light blocking part by dispersion and aggregation of the particles.

On the other hand, particles in the dispersion liquid disposed inside the pattern part may move in the direction of one electrode or two electrodes according to the application of voltage.

Depending on the moving speed of these particles, the driving speed and driving characteristics of the light-shielding film may be changed. When the moving speed of the particles is reduced, a voltage applied to the light-shielding film may increase and the driving speed and driving characteristics may decrease.

Accordingly, there is a need for a new structure of an optical path control member capable of improving the driving speed and driving characteristics.

An embodiment is to provide a light path control member having an improved frontal luminance.

An optical path control member according to an embodiment includes: a first substrate; a first electrode disposed on the first substrate; a second substrate disposed on the first substrate; a second electrode disposed under the second substrate; and a light conversion unit disposed between the first electrode and the second electrode, wherein the light conversion unit includes a barrier rib portion and a receiving unit which are alternately disposed, and a light converting material for changing the transmittance of light is included in the receiving unit It is filled, and the light conversion material includes a solvent, light conversion particles, and liquid crystal, and the liquid crystal is included in an amount of 1 wt% to 10 wt% based on the total weight of the light conversion material.

The light path control member according to the embodiment may control the viscosity and volatility of the light conversion material disposed inside the accommodating part.

In detail, the light path control member may reduce the viscosity of the light conversion material to realize a low viscosity, thereby increasing the movement speed of the light conversion particles of the light conversion material.

In addition, the liquid crystal included in the light conversion material may have low volatility while having low viscosity by preventing volatility.

In addition, it is possible to facilitate movement of the light conversion particles moving according to the application of voltage by the liquid crystal included in the light conversion material.

In addition, by imparting a certain polarity to the solvent, liquid crystal dispersibility of the light conversion material can be improved by preventing aggregation of liquid crystals having the polarity in the solvent.

Accordingly, the light path control member according to the embodiment may improve the movement speed of the light conversion particle and reduce the volatility of the light conversion material, and thus may have an improved drive speed and drive characteristics.

1 and 2 are views illustrating a perspective view of a light path control member according to an embodiment.
3 and 4 are perspective views of a first substrate, a first electrode, a second substrate, and a second electrode of a light path control member according to an embodiment, respectively.
5 to 7 are perspective views illustrating the arrangement of the sealing part on the light path control member according to the embodiment.
8 and 9 are perspective views for explaining that a sealing part is disposed on a light path control member according to another embodiment.
10 and 11 are views illustrating cross-sectional views taken along area AA′ of FIG. 1 .
12 is an enlarged view illustrating an enlarged area B of FIG. 10 .
FIG. 13 is an enlarged view illustrating an enlarged area C of FIG. 11 .
14 to 17 are views illustrating other cross-sectional views taken along area AA′ of FIG. 1 .
18 to 25 are views illustrating a method of manufacturing a light path control member according to an embodiment.
26 is a cross-sectional view of a display device to which a light path control member according to an exemplary embodiment is applied.
27 to 29 are views for explaining an embodiment of a display device to which a light path control member according to an embodiment is applied.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. However, the technical spirit of the present invention is not limited to some of the described embodiments, but may be implemented in various different forms, and within the scope of the technical spirit of the present invention, one or more of the components may be selected between embodiments. It can be combined and substituted for use.

In addition, terms (including technical and scientific terms) used in the embodiments of the present invention may be generally understood by those of ordinary skill in the art to which the present invention belongs, unless specifically defined and described explicitly. It may be interpreted as a meaning, and generally used terms such as terms defined in advance may be interpreted in consideration of the contextual meaning of the related art.

In addition, the terminology used in the embodiments of the present invention is for describing the embodiments and is not intended to limit the present invention. In this specification, the singular form may also include the plural form unless otherwise specified in the phrase, and when it is described as "at least one (or one or more) of A and (and) B, C", it can be combined with A, B, and C. It may contain one or more of all possible combinations.

In addition, in describing the components of the embodiment of the present invention, terms such as first, second, A, B, (a), (b), etc. may be used. These terms are only for distinguishing the component from other components, and are not limited to the essence, order, or order of the component by the term.

And, when it is described that a component is 'connected', 'coupled' or 'connected' to another component, the component is not only directly connected, coupled or connected to the other component, but also with the component It may also include a case of 'connected', 'coupled' or 'connected' due to another element between the other elements.

In addition, when it is described as being formed or disposed on "above (above) or below (below)" of each component, the top (above) or bottom (below) is one as well as when two components are in direct contact with each other. Also includes a case in which another component as described above is formed or disposed between two components.

In addition, when expressed as “up (up) or down (down)”, it may include not only the upward direction but also the meaning of the downward direction based on one component.

Hereinafter, an optical path control member according to an embodiment will be described with reference to the drawings. The optical path control member described below relates to a switchable optical path control member that drives in various modes according to electrophoretic particles moving by application of a voltage.

1 to 4 , the light path control member according to the embodiment includes a first substrate 110 , a second substrate 120 , a first electrode 210 , a second electrode 220 , and a light conversion unit. (300) may be included.

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

Also, the first substrate 110 may be transparent. For example, the first substrate 110 may include a transparent substrate capable of transmitting light.

The first substrate 110 may include glass, plastic, or a flexible polymer film. For example, the flexible polymer film is polyethylene terephthalate (PET), polycarbonate (Polycabonate, PC), acrylonitrile-butadiene-styrene copolymer (ABS), polymethyl methacrylic Polymethyl Methacrylate (PMMA), Polyethylene Naphthalate (PEN), Polyether Sulfone (PES), Cyclic Olefin Copolymer (COC), TAC (Triacetylcellulose) film, Polyvinyl alcohol ( Polyvinyl alcohol, PVA) film, polyimide (Polyimide, PI) film, may be made of any one of polystyrene (Polystyrene, PS), this is only an example, but is not necessarily limited thereto.

In addition, the first substrate 110 may be a flexible substrate having a flexible characteristic.

Also, 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. For this reason, the light path control member according to the embodiment may be changed into various designs.

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

In detail, the first substrate 110 extends in a first direction 1A corresponding to the length or width direction of the first substrate 110 and in a direction different from the first direction 1A, and the first substrate A second direction 2A corresponding to the length or width direction of 110 , and a direction different from the first direction 1A and the second direction 2A, the thickness direction of the first substrate 110 . and a third direction 3A corresponding to .

For example, the first direction 1A may be defined as a longitudinal direction of the first substrate 110 , and the second direction 2A may be defined as a first substrate ( 2A) perpendicular to the first direction 1A. 110 , and the third direction 3A may be defined as a thickness direction of the first substrate 110 . Alternatively, the first direction 1A may be defined as the first substrate 110 . ), the second direction 2A may be defined as a longitudinal direction of the first substrate 110 perpendicular to the first direction 1A, and the third direction 3A may be defined in the thickness direction of the first substrate 110 .

Hereinafter, for convenience of explanation, the first direction 1A is the longitudinal direction of the first substrate 110 , the second direction 2A is the width direction of the first substrate 110 , and the second direction 1A is the width direction of the first substrate 110 . The three directions 3A will be described as the thickness direction of the first substrate 110 .

The first electrode 210 may be disposed on one surface of the first substrate 110 . In detail, 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 .

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 indium tin oxide, indium zinc oxide, copper oxide, tin oxide, zinc oxide, It may include a metal oxide such as titanium oxide.

The first electrode 210 may have a thickness of about 10 nm to about 50 nm.

Alternatively, the first electrode 210 may include various metals to realize low resistance. For example, the first electrode 210 may include chromium (Cr), nickel (Ni), copper (Cu), aluminum (Al), silver (Ag), or molybdenum (Mo). It may include at least one metal among gold (Au), titanium (Ti), and alloys thereof.

Referring to FIG. 3 , the first electrode 210 may be disposed on the entire surface of one surface of the first substrate 110 . In detail, the first electrode 210 may be disposed as a surface electrode on one surface of the first substrate 110 . However, the embodiment is not limited thereto, and the first electrode 210 may be formed of a plurality of pattern electrodes having a uniform pattern such as a mesh or stripe shape.

For example, the first electrode 210 may include a plurality of conductive patterns. In detail, the first electrode 210 may include a plurality of mesh lines crossing each other and a plurality of mesh openings formed by the mesh lines.

Accordingly, even if the first electrode 210 includes a metal, the first electrode is not visually recognized from the outside, so that visibility may be improved. In addition, the light transmittance is increased by the openings, so that the luminance of the light path control member according to the embodiment may be improved.

The second substrate 120 may be disposed on the first substrate 110 . In detail, the second substrate 120 may be disposed on the first electrode 210 on the first substrate 110 .

The second substrate 120 may include a material capable of transmitting light. The second substrate 120 may include a transparent material. The second substrate 120 may include the same or similar material to that of the first substrate 110 described above.

For example, the second substrate 120 may include glass, plastic, or a flexible polymer film. For example, the flexible polymer film is polyethylene terephthalate (PET), polycarbonate (Polycabonate, PC), acrylonitrile-butadiene-styrene copolymer (ABS), polymethyl methacrylic Polymethyl Methacrylate (PMMA), Polyethylene Naphthalate (PEN), Polyether Sulfone (PES), Cyclic Olefin Copolymer (COC), TAC (Triacetylcellulose) film, Polyvinyl alcohol ( Polyvinyl alcohol, PVA) film, polyimide (Polyimide, PI) film, may be made of any one of polystyrene (Polystyrene, PS), this is only an example, but is not necessarily limited thereto.

In addition, the second substrate 120 may be a flexible substrate having a flexible characteristic.

Also, 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. For this reason, the light path control member according to the embodiment may be changed into various designs.

The second substrate 120 may also extend in the first direction 1A, the second direction 2A, and the third direction 3A in the same manner as the first substrate 110 described above.

In detail, the second substrate 120 extends in a first direction 1A corresponding to the length or width direction of the second substrate 120 and in a direction different from the first direction 1A, and the second substrate A second direction 2A corresponding to the length or width direction of 120 , and a direction different from the first direction 1A and the second direction 2A, the thickness direction of the second substrate 120 . and a third direction 3A corresponding to .

For example, the first direction 1A may be defined as a longitudinal direction of the second substrate 120 , and the second direction 2A may be a second substrate ( 2A) perpendicular to the first direction 1A. 120 may be defined in a width direction, and the third direction 3A may be defined as a thickness direction of the second substrate 120 .

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

Hereinafter, for convenience of description, the first direction 1A is the longitudinal direction of the second substrate 120 , the second direction 2A is the width direction of the second substrate 120 , and the second direction 1A is the width direction of the second substrate 120 . The three directions 3A will be described as the thickness direction of the second substrate 120 .

The second electrode 220 may be disposed on one surface of the second substrate 120 . In detail, 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 and the first substrate 110 facing each other. That is, the second electrode 220 may be disposed to face 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 .

The second electrode 220 may include the same or similar material to the first electrode 210 described above.

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 second electrode 220 may include indium tin oxide, indium zinc oxide, copper oxide, tin oxide, zinc oxide, It may include a metal oxide such as titanium oxide.

The second electrode 220 may have a thickness of about 10 nm to about 50 nm.

Alternatively, the second electrode 220 may include various metals to realize low resistance. For example, the second electrode 220 may be chromium (Cr), nickel (Ni), copper (Cu), aluminum (Al), silver (Ag), or molybdenum (Mo). It may include at least one metal among gold (Au), titanium (Ti), and alloys thereof.

Referring to FIG. 4 , the second electrode 220 may be disposed on the entire surface of one surface of the second substrate 120 . In detail, the second electrode 220 may be disposed as a surface electrode on one surface of the second substrate 120 . However, the embodiment is not limited thereto, and the second electrode 220 may be formed of a plurality of pattern electrodes having a predetermined pattern such as a mesh or stripe shape.

For example, the second electrode 220 may include a plurality of conductive patterns. In detail, the second electrode 220 may include a plurality of mesh lines crossing each other and a plurality of mesh openings formed by the mesh lines.

Accordingly, even if the second electrode 220 includes a metal, the second electrode is not visually recognized from the outside, so that visibility may be improved. In addition, the light transmittance is increased by the openings, so that the luminance of the light path control member according to the embodiment may be improved.

The first substrate 110 and the second substrate 120 may have sizes corresponding to each other. The first substrate 110 and the second substrate 120 may have the same or similar size to each other.

In detail, the first length extending in the first direction 1A of the first substrate 110 is the same as the second length L2 extending in the first direction 1A of the second substrate 120 or They may have a similar size.

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

In addition, the first width extending in the second direction 2A of the first substrate 110 may have the same or similar size as the second width extending in the second direction of the second substrate 120 . .

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

In addition, a first thickness extending in the third direction 3A of the first substrate 110 may be the same as or similar to a second thickness extending in the third direction of the second substrate 120 . .

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

Referring to FIG. 1 , the first substrate 110 and the second substrate 120 may be alternately disposed.

In detail, the first substrate 110 and the second substrate 120 may be disposed at positions crossing each other in the first direction 1A. In detail, the first substrate 110 and the second substrate 120 may be disposed so that the side surfaces of each of the substrates cross each other.

Accordingly, the first substrate 110 may be disposed to protrude in one direction in the first direction 1A, and the second substrate 120 may protrude in the other direction in the first direction 1A. can be placed.

That is, the first substrate 110 may include a first protrusion protruding in one direction in the first direction 1A, and the second substrate 110 protruding in the other direction in the first direction 1A. It may include a second protrusion.

Accordingly, in the optical path control member 1000 , the region where the first electrode 210 is exposed on the first substrate 110 and the second electrode 220 are exposed under the second substrate 120 . It may include an area to be

That is, the first electrode 210 disposed on the first substrate 110 is exposed at the first protrusion, and the second electrode 220 disposed under the second substrate 120 is the The second protrusion may be exposed.

The first electrode 210 and the second electrode 220 exposed from the protrusions may be connected to an external printed circuit board through a pad part, which will be described below.

Alternatively, referring to FIG. 2 , the first substrate 110 and the second substrate 120 may be disposed at positions corresponding to each other. In detail, the first substrate 110 and the second substrate 120 may be arranged so that respective side surfaces correspond to each other.

Accordingly, the first substrate 110 may be disposed to protrude in one direction of the first direction 1A, and the second substrate 120 may also be disposed in one direction of the first direction 1A, that is, the It may be disposed to protrude in the same direction as the first substrate 110 .

That is, the first substrate 110 may include a first protrusion that protrudes in one direction in the first direction 1A, and the second substrate also protrudes in one direction in the first direction 1A. It may include a second protrusion.

That is, the first protrusion and the second protrusion may protrude in the same direction.

Accordingly, in the optical path control member 1000 , the region where the first electrode 210 is exposed on the first substrate 110 and the second electrode 220 are exposed under the second substrate 120 . It may include an area to be

That is, the first electrode 210 disposed on the first substrate 110 is exposed at the first protrusion, and the second electrode 220 disposed under the second substrate 120 is the The second protrusion may be exposed.

The first electrode 210 and the second electrode 220 exposed from the protrusions may be connected to an external printed circuit board through a connection part to be described below.

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

Functional layers may be disposed between at least one of the light conversion unit 300 and the first substrate 110 or between the light conversion unit 300 and the second substrate 120 .

In detail, a buffer layer 410 that facilitates adhesion between the light conversion unit 300 and the first substrate 110 may be disposed between the light conversion unit 300 and the first substrate 110 . Also, an adhesive layer 420 bonding the second electrode 220 and the light conversion unit 300 may be disposed between the light conversion unit 300 and the second substrate 120 .

The light conversion unit 300 may include a plurality of barrier ribs and a receiving unit. Light conversion particles that move according to the application of voltage may be disposed in the accommodating part, and light transmission characteristics of the light path control member may be changed by the light conversion particles.

The light path control member may include a sealing part.

5 to 7 , a sealing part may be disposed on the outer surface of the light path control member.

The sealing part 500 may be disposed while covering the outer surface of the light path control member. In detail, the sealing part 500 may be disposed while partially covering the outer surface of the light path control member. That is, the sealing part 500 may be disposed while extending from the first substrate 110 to the second substrate 120 and partially covering the outer surface of the optical path control member.

The light path control member 1000 may include a plurality of side surfaces. In detail, the light path control member 1000 may include side surfaces extending in the first direction 1A and facing each other and side surfaces extending in the second direction 2A and facing each other.

The sealing part 500 may be disposed while surrounding the side surfaces of the light path control member extending in the first direction 1A. For example, the sealing unit 500 may be disposed while surrounding the side surfaces of the light path control member to which the receiving unit 320 in which the light converting particles are disposed in the light converting unit 300 is exposed.

In detail, the sealing part 500 may be partially disposed on the side surface of the optical path control member while covering the receiving part 320 exposed from the side surface of the optical path control member as shown in FIG. 5 .

Alternatively, the sealing part 500 may be entirely disposed on the side surface of the optical path control member while covering the receiving part 320 exposed from the side surface of the optical path control member as shown in FIG. 6 .

In detail, the accommodating part 320 may be disposed to extend from the light conversion part 300 in the second direction 2A with respect to the first substrate 110 and the second substrate 120 . . That is, the plurality of accommodating parts 320 may be disposed to extend in the second direction 2A while being spaced apart from each other.

Accordingly, the receiving part 320 may be exposed in both side directions of the first direction 1A of the light converting part 300 . The sealing part 500 may be disposed while covering the accommodating part 320 exposed by the light converting part 300 to protect the light converting particles inside the exposed accommodating part.

That is, the sealing part 500 may be disposed on a part of a side surface of the light conversion part 300 , a part of a lower surface of the first substrate 110 , and a part of an upper surface of the second substrate 120 . have. In other words, the sealing part 500 surrounds the exposed accommodating part of the light conversion part, part of the side surface of the light conversion part 300, a part of the lower surface of the first substrate 110, and the second substrate ( 120) may be disposed on a portion of the upper surface.

The sealing part 500 may include a resin material having a viscosity of 300 cP or more.

Alternatively, referring to FIG. 7 , the sealing part 500 may be formed between side surfaces of the light path controlling member extending in the first direction 1A and the light path controlling member extending in the second direction 2A. It may be disposed while enclosing the sides.

Accordingly, at least one of the side surfaces of the light conversion unit 300 in the second direction may also be entirely covered by the sealing unit 500 .

Accordingly, in the light path control member according to the embodiment, the outer surface of the light conversion unit 300 may be entirely sealed by the sealing unit 500 . That is, it is possible to prevent the penetration of impurities, such as moisture and air, that may penetrate into the accommodating part from the side of the light conversion part 300 in the second direction.

That is, during the manufacturing process of the light path control member, the thickness of the side surfaces of the light conversion unit 300 in the second direction may be different from each other due to tolerance, and the width of one of the side surfaces in the second direction is small. is formed so that impurities that can permeate into the accommodating part may permeate into the accommodating part through the partition wall part.

In the light path control member according to the embodiment, by arranging the sealing part also on the side surface of the light conversion part in the second direction, it is possible to effectively prevent impurity penetration according to the size of the partition wall part.

Meanwhile, although it is illustrated that the sealing unit is disposed on the outer surface of the light path member in FIGS. 5 to 7 , the embodiment is not limited thereto, and may be disposed on the upper surface of the light conversion unit 300 .

8 and 9 , unlike FIGS. 1 and 2 , the first substrate 110 and the second substrate 120 may have different sizes.

In detail, the first length extending in the first direction 1A of the first substrate 110 is equal to the second length L2 extending in the first direction 1A of the second substrate 120 and 300 mm to It can have the same similar length within the size range of 400 mm.

In addition, a first width extending in the second direction 2A of the first substrate 110 may have a second width extending in the second direction of the second substrate 120 within a size range of 150 mm to 200 mm. may have different sizes.

For example, the second width extending in the second direction of the second substrate 120 may be smaller than the size of the first width extending in the second direction 2A of the first substrate 110 .

Accordingly, both ends of the light conversion unit 300 in the second direction may be disposed to be spaced apart from the second substrate 120 .

At both ends of the light conversion unit 300 in the second direction, a sealing unit 500 and a dam unit 600 which are respectively disposed on the light conversion unit may be disposed.

The dam part 600 may determine an injection part and an exit part when the light conversion material is injected into the accommodating part, and the sealing part 500 is formed between the injection part and the outlet after the light conversion material is injected. You can seal wealth.

That is, the sealing portion 500 is to be disposed on the partition wall portion 310 while filling the receiving portion 320 of the light conversion portion 300 at both ends of the light conversion portion 300 in the second direction. can

10 and 11 , the light conversion unit 300 may include a partition wall unit 310 and a receiving unit 320 .

The partition wall part 310 may be defined as a partition wall area dividing the accommodation part. That is, the barrier rib portion 310 may transmit light as a barrier rib region partitioning a plurality of accommodation units. In addition, the accommodating part 320 may be defined as a region that changes into a light blocking part and a light transmitting part according to the application of a voltage.

The partition wall part 310 and the accommodating part 320 may be alternately disposed with each other. The partition wall part 310 and the accommodating part 320 may be disposed to have different widths. For example, the width of the partition wall portion 310 may be greater than the width of the accommodation portion 320 .

The partition wall part 310 and the accommodating part 320 may be alternately disposed with each other. In detail, the partition wall part 310 and the accommodating part 320 may be alternately disposed with each other. That is, each of the partition wall portions 310 may be disposed between the accommodating portions 320 adjacent to each other, and each accommodating portion 320 may be disposed between the adjacent partition wall portions 310 .

The barrier rib part 310 may include a transparent material. The barrier rib part 310 may include a material that can transmit light.

The partition wall part 310 may include a resin material. For example, the barrier rib part 310 may include a photo-curable resin material. For example, the barrier rib part 310 may include a UV resin or a transparent photoresist resin. Alternatively, the partition wall portion 310 may include a urethane resin or an acrylic resin.

The barrier rib part 310 may transmit light incident on one of the first substrate 110 and the second substrate 120 in the direction of the other substrate.

For example, in FIGS. 10 and 11 , light is emitted from the first substrate 110 by a light source disposed under the first substrate 110 and the light is incident in the direction of the second substrate 120 . In this case, the barrier rib part 310 may transmit the light, and the transmitted light may move in the direction of the second substrate 120 .

12 and 13 , a light conversion material may be disposed in the receiving part 320 . In detail, a light conversion material having a constant viscosity may be disposed inside the accommodating part 320 .

The light conversion material may include a solvent 320a, light conversion particles 320b, and a liquid crystal 320c. The light conversion particles 320b and the liquid crystal 320c may be dispersed in the solvent 320a.

That is, the accommodating part 320 may be filled with the solvent 320a in which the light conversion particles 320b and the liquid crystal 320c are dispersed.

The solvent 320a may be a material that disperses the light conversion particles 320b and the liquid crystal 320c. The dispersion 320a may include a transparent material. The solvent 320a may include a material capable of transmitting light.

The solvent 320a may include a polar solvent or a non-polar solvent.

For example, the solvent 320a may include a material having an aromatic ring to have polarity. For example, the solvent 320a may include a polar hydrocarbon having an aromatic ring.

Alternatively, the solvent 320a may include at least one of non-polar halocarbon-based oil, paraffin-based oil, and isopropyl alcohol.

The light conversion particles 320b may be dispersed in the solvent 320a. In detail, the plurality of light conversion particles 320b may be disposed to be spaced apart from each other in the solvent 320a.

The light conversion particles 320b may include a material capable of absorbing light. That is, the light conversion particles 320b) may be light absorbing particles, and the light conversion particles 320b may have a color. For example, the light conversion particles 320b may have a black-based color. For example, the light conversion particles 320b may include carbon black particles.

The light conversion particle 320b may have a polarity due to its surface being charged. For example, the surface of the light conversion particle 320b may be negatively charged. Accordingly, according to the application of the voltage, the light conversion particles 320b may move in the direction of the first electrode 210 or the second electrode 220 .

The light transmittance of the receiving part 320 may be changed by the light conversion particles 320b. In detail, the accommodating part 320 may be changed into a light blocking part and a light transmitting part by changing the light transmittance by the light conversion particles 320b. That is, the accommodating part 320 may change the transmittance of the light passing through the accommodating part 320 by dispersion and aggregation of the light conversion particles 320b disposed therein in the dispersion 320a.

For example, the light path member according to the embodiment changes from the first mode to the second mode or from the second mode to the first mode by a voltage applied to the first electrode 210 and the second electrode 220 . can be

In detail, in the light path control member according to the embodiment, in the first mode, the accommodating part 320 may become a light blocking part, and light at a specific angle may be blocked by the accommodating part 320 . That is, the viewing angle of the user viewing from the outside is narrowed, so that the light path control member may be driven in the privacy mode.

In addition, in the light path control member according to the embodiment, in the second mode, the accommodating part 320 becomes a light transmitting part, and in the light path controlling member according to the embodiment, the partition wall part 310 and the accommodating part 320 are separated from each other. All light can be transmitted. That is, the viewing angle of the user viewing from the outside is widened, so that the light path control member may be driven in the open mode.

The conversion from the first mode to the second mode, that is, the conversion of the accommodating part 320 from the light blocking part to the light transmissive part, may be implemented by the movement of the light conversion particles 320b of the accommodating part 320 . can That is, the light conversion particle 320b has a charge on its surface, and may move in the direction of the first electrode or the second electrode according to the application of a voltage according to the characteristics of the charge. That is, the light conversion particle 320b may be an electrophoretic particle.

In detail, the accommodating part 320 may be electrically connected to the first electrode 210 and the second electrode 220 .

At this time, when no voltage is applied to the optical path control member from the outside, the light conversion particles 320b of the accommodating part 320 are uniformly dispersed in the solvent 320a, and accordingly, the accommodating part 320 . light may be blocked by the light conversion particles 320b. Accordingly, in the first mode, the receiving unit 320 may be driven as a light blocking unit.

Alternatively, when a voltage is applied to the light path control member from the outside, the light conversion particles 320b may move. For example, the light conversion particle 320b may be moved toward one end or the other end of the receiving unit 320 by a voltage transmitted through the first electrode 210 and the second electrode 220 . can That is, the light conversion particles 320b may move in the direction of the first electrode 210 or the second electrode 220 .

In detail, 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, The light conversion particles 320b in a negatively charged state may move toward the positive electrode of the first electrode 210 and the second electrode 220 using the solvent 320a as a medium.

That is, when a voltage is applied to the first electrode 210 and/or the second electrode 220 , as shown in FIG. 10 , the light conversion particle 320b is the first electrode in the solvent 320a. It may move in the (210) direction, that is, the light conversion particles 320b may be moved in one direction, and the receiving unit 320 may be driven as a light transmitting unit.

Alternatively, when no voltage is applied to the first electrode 210 and/or the second electrode 220 , as shown in FIG. 11 , the light conversion particles 320b are uniformly dispersed in the solvent 320a. Thus, the accommodating part 320 may be driven as a light blocking part.

Accordingly, the light path control member according to the embodiment may be driven in two modes according to the user's surrounding environment. That is, when the user wants to transmit light only at a specific viewing angle, the receiving unit is driven as a light blocking unit, or in an environment where the user requires a wide viewing angle and high luminance, voltage is applied to drive the receiving unit as a light transmitting unit. have.

Accordingly, since the light path control member according to the embodiment can be implemented in two modes according to the user's request, the light path member can be applied regardless of the user's environment.

The liquid crystal 320c may be dispersed in the solvent 320a.

As the light conversion material includes the liquid crystal 320c, the light conversion material may have a low viscosity. Accordingly, the moving speed of the light conversion particles 320b dispersed in the solvent 320a may be improved. That is, it is possible to improve the moving speed of the light conversion particles 320b in inverse proportion to the viscosity of the solvent.

Accordingly, the moving speed of the light conversion particle 320b may be increased, thereby improving the driving speed of the light path controlling member.

Also, since the liquid crystal 320c is included, the light conversion material may have low volatility.

That is, in the case of a general low-viscosity material, there is a problem in that the flash point decreases and the evaporation rate increases, thereby increasing the volatility. Accordingly, it can have low volatility while implementing low viscosity.

Also, the liquid crystal 320c may facilitate movement of the moving light conversion particles 320b when a voltage is applied to the light path control member.

12 , when no voltage is applied to the light path control member, the liquid crystal 320c may be arranged in an irregular direction in the solvent 320a.

However, referring to FIG. 13 , when a voltage is applied to the light path control member, the liquid crystal 320c may be arranged in a regular direction in the solvent 320a. That is, the longitudinal direction of the liquid crystal 320c may be arranged in a direction in which the first electrode 210 and the second electrode 220 face each other.

Accordingly, when the light conversion particles 320b move in the direction of the first electrode 210 or the second electrode 220, the liquid crystal 320c arranged in the movement direction of the light conversion particles 320b causes the The light conversion particles 320b may move easily, thereby improving the driving speed of the light conversion particles.

The liquid crystal 320c may be included in a constant weight % range with respect to the entire light conversion material. The liquid crystal 320c may be included in an amount of 10 wt % or less based on the total weight of the light conversion material. In detail, the liquid crystal 320c may be included in an amount of 1 wt% to 10 wt% based on the entire light conversion material. In more detail, the liquid crystal 320c may be included in an amount of 1 wt% to 5 wt% based on the total weight of the light conversion material.

When the liquid crystal 320c is included in an amount exceeding 10 wt% based on the total amount of the light conversion material, a phenomenon in which the liquid crystal 320c is aggregated with each other in the solvent 320a may occur.

In particular, when the solvent 320a includes a non-polar solvent, the liquid crystals 320c having polarity may not be dispersed and may aggregate with each other.

The light conversion particles 320b and the liquid crystal 320c may be included in different weight % ranges with respect to the entire light conversion material.

For example, the weight % of the light conversion particles 320b with respect to the entire light conversion material may be greater than or smaller than the weight % of the liquid crystal 320c with respect to the light conversion material as a whole.

In detail, a ratio of the weight % of the light conversion particles 320b with respect to the entire light conversion material and the weight % of the liquid crystal 320c with respect to the entire light conversion material may be 1:0.2 to 1:3.

When the ratio of the weight % of the light conversion particles 320b with respect to the entire light conversion material and the weight % of the liquid crystal 320c with respect to the light conversion material as a whole is less than 1:0.2, the content of the liquid crystal in the light conversion material is reduced, the viscosity of the light conversion material may be increased, and thereby the driving speed of the light path controlling member may be lowered.

In addition, when the ratio of the weight % of the light conversion particle 320b with respect to the entire light conversion material and the weight % of the liquid crystal 320c with respect to the entire light conversion material exceeds 1:3, the liquid crystal in the light conversion material The effect of improving the driving speed may be insignificant compared to the amount in which the content of is increased, and the liquid crystals may agglomerate with each other, so that the driving characteristics of the light path control member may be deteriorated.

Meanwhile, as described above, the solvent 320a may have a polarity. When the solvent 320a has a polarity, dispersibility of the liquid crystal 320c disposed in the solvent 320a may be improved.

That is, since both the solvent 320a and the liquid crystal 320c have polarities, aggregation of the liquid crystals 320c with each other in the solvent 320a can be minimized.

The polarity size of the solvent 320a and the polarity size of the liquid crystal 320c may be different from each other. In detail, the polarity of the solvent 320a may be smaller than the polarity of the liquid crystal 320c.

The difference between the polarity of the solvent 320a and the polarity of the liquid crystal 320c may be 0.08 to 0.8.

When the difference between the polarity size of the solvent 320a and the polarity size of the liquid crystal 320c is less than 0.08, the movement speed of the light conversion material in the solvent may be reduced due to the increase in the polarity of the solvent. In addition, when the difference between the polarity size of the solvent 320a and the polarity size of the liquid crystal 320c exceeds 0.8, the liquid crystal may aggregate with each other in the solvent due to the difference in polarity between the solvent and the liquid crystal.

Meanwhile, the accommodating part may be arranged in a different shape in consideration of driving characteristics and the like.

14 and 15 , in the light path control member according to another embodiment, both ends of the receiving part 320 are in contact with the buffer layer 410 and the adhesive layer 420 differently from FIGS. 10 and 11 , and may be disposed. have.

For example, the lower portion of the receiving portion 320 may be disposed in contact with the buffer layer 410 , and the upper portion of the receiving portion 320 may be disposed in contact with the adhesive layer 420 .

Accordingly, the distance between the accommodating part 320 and the first electrode 210 is reduced, so that the voltage applied from the first electrode 210 may be smoothly transmitted to the accommodating part 320 .

Accordingly, the moving speed of the light conversion particle 320b inside the receiving part 320 may be improved, and thus the driving characteristics of the light path control member may be improved.

Also, referring to FIGS. 16 and 17 , in the light path control member according to the embodiment, unlike FIGS. 10 and 11 , the receiving part 320 may be disposed while having a constant inclination angle θ.

In detail, referring to FIGS. 16 and 17 , the receiving part 320 may be disposed while having an inclination angle θ of greater than 0° to less than 90° with respect to the first substrate 110 . In detail, the accommodating part 320 may extend upwardly while having an inclination angle θ of greater than 0° to less than 90° with respect to one surface of the first substrate 110 .

Accordingly, when the light path member is used together with the display panel, moire caused by the overlapping phenomenon between the pattern of the display panel and the receiving portion 320 of the light path member may be alleviated, thereby improving user visibility.

The light path control member according to the embodiment may control the viscosity and volatility of the light conversion material disposed inside the accommodating part.

In detail, the light path control member may reduce the viscosity of the light conversion material to realize a low viscosity, thereby increasing the movement speed of the light conversion particles of the light conversion material.

In addition, the liquid crystal included in the light conversion material may have low volatility while having low viscosity by preventing volatility.

In addition, it is possible to facilitate movement of the light conversion particles moving according to the application of voltage by the liquid crystal included in the light conversion material.

In addition, by imparting a certain polarity to the solvent, liquid crystal dispersibility of the light conversion material can be improved by preventing aggregation of liquid crystals having the polarity in the solvent.

Accordingly, the light path control member according to the embodiment may improve the movement speed of the light conversion particle and reduce the volatility of the light conversion material, and thus may have an improved drive speed and drive characteristics.

Hereinafter, a method of manufacturing the light path control member according to the embodiment will be described with reference to FIGS. 18 to 25 . The method of manufacturing the light path control member described below will be mainly described with respect to the case in which the first substrate and the second substrate have the same size as in FIGS. 1 and 2 .

Referring to FIG. 18 , an electrode material for forming the first substrate 110 and the first electrode is prepared. Subsequently, the first electrode may be formed by coating or depositing the electrode material on one surface of the first substrate. In detail, the electrode material may be formed on the entire surface of the first substrate 110 . Accordingly, the first electrode 210 formed as a surface electrode may be formed on the first substrate 110 .

Then, referring to FIG. 19 , a resin layer 350 may be formed by coating a resin material on the first electrode 210 . In detail, the resin layer 350 may be formed by coating a urethane resin or an acrylic resin on the first electrode 210 .

In this case, before disposing the resin layer 350 , a buffer layer 410 may be additionally disposed on the first electrode 210 . In detail, by disposing the buffer layer 410 having good adhesion to the resin layer 350 on the first electrode 210 , and then disposing the resin layer 350 on the buffer layer 410 , the resin layer It is possible to improve the adhesion of (350).

For example, the buffer layer 410 includes a lipophilic group such as -CH- and an alkyl group having good adhesion to the electrode and a hydrophilic group such as -NH, -OH, -COOH, etc., having a good adhesion to the resin layer 410 It may contain organic matter.

The resin layer 350 may be disposed on a partial region of the first substrate 110 . That is, the resin layer 350 may be disposed in a smaller area than the first substrate 110 . Accordingly, a region in which the resin layer 350 is not disposed on the first substrate 110 and the first electrode 210 is exposed may be formed. In addition, when the buffer layer 410 is disposed on the first electrode 210 , a region in which the buffer layer 410 is exposed may be formed.

Then, referring to FIG. 20 , the resin layer 350 may be patterned to form a plurality of partition wall portions 310 and a plurality of accommodating portions 320 in the resin layer 350 . In detail, an intaglio portion may be formed in the resin layer 350 to form the intaglio-shaped accommodation part 320 and the embossed partition wall part 310 between the intaglio portions.

Accordingly, the light conversion part 300 including the partition wall part 310 and the accommodating part 320 may be formed on the first substrate 110 .

In addition, the buffer layer 410 exposed on the first electrode 210 may be removed to expose the first electrode 210 in a region where the first substrate 110 protrudes.

Next, referring to FIG. 21 , electrode materials for forming the second substrate 120 and the second electrode are prepared. Subsequently, the second electrode may be formed by coating or depositing the electrode material on one surface of the second substrate. In detail, the electrode material may be formed on the entire surface of the second substrate 120 . Accordingly, the second electrode 220 formed as a surface electrode may be formed on the second substrate 120 .

The second substrate 120 may be smaller than the size of the first substrate 110 . In addition, the second substrate 120 may be smaller than the size of the resin layer 350 .

In detail, the size of the second length extending in the first direction of the second substrate 120 is greater than the third length extending in the first direction of the resin layer 350 , and the second length of the second substrate 120 is The size of the second width extending in the second direction may be smaller than the size of the third width extending in the second direction of the resin layer 350 .

Subsequently, referring to FIG. 22 , an adhesive layer 420 may be formed by applying an adhesive material on the second electrode 220 . In detail, a light-transmitting adhesive layer capable of transmitting light may be formed on the second electrode 220 . For example, the adhesive layer 420 may include an optically transparent adhesive layer (OCA).

The adhesive layer 420 may be disposed on a partial region of the light conversion unit 300 . That is, the adhesive layer 420 may be disposed in a smaller area than the light conversion unit 300 . Accordingly, since the adhesive layer 410 is not disposed on the light conversion unit 300 , a region in which the light conversion unit 300 is exposed may be formed.

Then, referring to FIG. 23 , the first substrate 110 and the second substrate 120 may be adhered. In detail, the second substrate 120 is disposed on the light conversion unit 300 , and the second substrate 120 and the second substrate 120 and the adhesive layer 420 are disposed under the second substrate 120 . The light conversion unit 300 may be adhered.

The light conversion unit 300 and the second substrate 120 may be sequentially stacked in a thickness direction of the first substrate 110 , the light conversion unit 300 , and the second substrate 120 .

In this case, since the second substrate 120 is disposed smaller than the size of the resin layer 350 , the light conversion unit 300 includes a plurality of partition wall portions 310 in an area where the second substrate 120 is not disposed. ) and the accommodating part 320 may be exposed.

In detail, since the size of the second width extending in the second direction of the second substrate 120 is smaller than the size of the third width extending in the second direction of the resin layer 350 , the resin layer 350 . The plurality of partition walls 310 and accommodating portions 320 may be exposed in an end region of at least one of one end and the other end facing in the width direction.

Subsequently, the light conversion material 380 may be injected between the receiving portions 320 , that is, the barrier rib portions 310 . In detail, a light conversion material in which light absorbing particles such as carbon black are dispersed may be injected into the accommodating portion 320 , that is, an electrolyte solvent including a paraffinic solvent or the like between the partition walls. That is, the light conversion material 380 including the above-described dispersion may be injected into the accommodating part.

For example, after disposing a dam extending in the longitudinal direction of the light conversion unit 300 on the receiving portion and the partition wall portion of the light conversion unit 300 on which the second substrate 120 is not disposed, the dam An electrolyte solvent may be injected into the accommodating part 320 through a capillary injection method between the side surface of the light conversion part 300 and the light conversion part 300 .

Then, referring to FIG. 24 , one light path control member may be manufactured by cutting the light conversion unit 300 . In detail, the light conversion unit 300 may be cut in the longitudinal direction of the light conversion unit 300 . That is, along the dotted line shown in FIG. 22 , the light conversion unit 300 and the buffer layer 410 under the light conversion unit 300 , the first electrode 210 , and the first substrate 110 may be cut. . A plurality of light path controlling members A and B may be formed by the cutting process, and FIG. 24 is a view showing one of the plurality of light path controlling members.

In detail, so that side surfaces of the first substrate 110 , the second substrate 120 , and the light conversion unit 300 in the width direction may be disposed on the same plane, or in the second direction of the second substrate The light conversion unit 300 may be cut so that both ends of the light conversion unit are disposed on a cross-section perpendicular to both ends of the light conversion unit in the second direction.

Accordingly, both ends of the second substrate 120 , the second electrode 220 or the adhesive layer 420 in the second direction and both ends of the light conversion unit 300 in the second direction are on the same plane may be placed on the

In other words. Both ends of the adhesive layer 420 in the second direction and both ends of the light conversion unit 300 in the second direction may be disposed on the same plane.

Alternatively, both ends of the second substrate 120 , the second electrode 220 , or the adhesive layer 420 in the second direction are positive in the second direction according to an error during the process. It may be disposed more outside than the end.

Subsequently, the buffer layer 410 and/or the adhesive layer 420 disposed on the upper portion of the first substrate 110 and the lower portion of the second substrate 120 may be partially removed to form a connection portion in which the electrode is exposed. . In detail, when the buffer layer 410 is disposed on the first electrode where the light conversion unit 300 is not disposed on the upper surface of the first substrate 110 , the first buffer layer 410 is partially removed, By exposing the first electrode 210 or not disposing the buffer layer 410 on the first electrode on which the light conversion unit 300 is not disposed, the first connection part ( 211) can be formed. In addition, when the adhesive layer 420 is disposed on the second electrode where the light conversion unit 300 is not disposed on the lower surface of the second substrate 120 , a part of the adhesive layer 420 is removed or the bonding process is performed. By not disposing an adhesive layer on the second electrode on which the light conversion unit 300 is not disposed, the second connection unit 221 may be formed under the second substrate 120 .

A printed circuit board or a flexible printed circuit board may be connected to the connection parts through an anisotropic conductive film (ACF) or the like, and the printed circuit board may be connected to an external power source to apply a voltage to the optical path control member.

Subsequently, referring to FIG. 25 , the sealing part 500 may be disposed through the sealing material. In detail, the sealing part 500 may be disposed in contact with each side surface extending in the first direction, each side surface extending in the second direction, and upper and lower portions of the light path control member of the light path control member. can

Alternatively, the sealing part 500 may be disposed in contact with respective side surfaces extending in the first direction of the light path controlling member and upper and lower portions of the light path controlling member.

Accordingly, the housing part exposed to the outside by the sealing part 500, that is, the dispersion in which the light conversion particles are dispersed, is sealed from the outside, thereby preventing denaturation of the light conversion particles by external moisture, oxygen, or the like.

below. A display device and a display device to which the light path control member according to the embodiment is applied will be described with reference to FIGS. 26 to 29 .

Referring to FIG. 26 , the light path control member 1000 according to the embodiment may be disposed on the display panel 2000 .

The display panel 2000 and the light path control member 1000 may be disposed to adhere to each other. For example, the display panel 2000 and the light path control member 1000 may be bonded to each other through 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.

The adhesive member 1500 may include a release film. In detail, when the light path member and the display panel are adhered, the light path control member and the display panel may be adhered after the release film is removed.

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 display panel 2000 includes a first substrate 2100 including a thin film transistor (TFT) and a pixel electrode, and a second substrate including color filter layers. 2200 may be formed in a structure in which the liquid crystal layer is interposed therebetween.

In addition, in the display panel 2000 , a thin film transistor, a color filter, and a black electrolyte 320a are formed on a first substrate 2100 , and a second substrate 2200 has a liquid crystal layer interposed therebetween. ) and may be a liquid crystal display panel having a color filter on transistor (COT) structure. That is, a thin film transistor may be formed on the first substrate 2100 , a protective film may be formed on the thin film transistor, and a color filter layer may be formed on the protective film. In addition, a pixel electrode in contact with the thin film transistor is formed on the first substrate 2100 . In this case, in order to improve the aperture ratio and simplify the mask process, the black electrolyte may be omitted, and the common electrode may also serve as the black electrolyte.

Also, when the display panel 2000 is a liquid crystal display panel, the display device may further include a backlight unit that provides light from a rear surface of the display panel 2000 .

Alternatively, when the display panel 2000 is an organic light emitting display panel, the display panel 2000 may include a self-luminous device that does not require a separate light source. In the display panel 2000 , a thin film transistor may be formed on a first substrate 2100 , and an organic light emitting device in contact with the thin film transistor may be formed. The organic light emitting device may include an anode, a cathode, and an organic light emitting layer formed between the anode and the cathode. In addition, a second substrate 2200 serving as an encapsulation substrate for encapsulation on the organic light emitting device may be further included.

Also, although not shown in the drawings, a polarizing plate may be further disposed between the light path control member 1000 and the display panel 2000 . The polarizing plate may be a linear polarizing plate or an external light reflection preventing polarizing plate. For example, when the display panel 2000 is a liquid crystal display panel, the polarizing plate may be a linear polarizing plate. In addition, when the display panel 2000 is an organic light emitting display panel, the polarizing plate may be an external light reflection preventing polarizing plate.

In addition, an additional functional layer 1300 such as an anti-reflection layer or anti-glare may be further disposed on the light path control member 1000 . In detail, the functional layer 1300 may be adhered to one surface of the base substrate 100 of the light path control member. Although not shown in the drawings, the functional layer 1300 may be bonded to the base substrate 100 of the light path control member through an adhesive layer. In addition, a release film for protecting the functional layer may be further disposed on the functional layer 1300 .

Also, a touch panel may be further disposed between the display panel and the light path control member.

Although the drawing illustrates that the light path control member is disposed on the display panel, the embodiment is not limited thereto, and the light control member is positioned at a position where light can be controlled, that is, a lower portion of the display panel or the display panel. It may be disposed in various positions, such as between the second substrate and the first substrate.

27 and 28 , the light path control member according to the embodiment may be applied to various display devices.

27 and 28 , the light path control member according to the embodiment may be applied to a display device displaying a display.

For example, when power is not applied to the light path control member as shown in FIG. 26 , the accommodating unit functions as a light blocking unit, the display device is driven in the light blocking mode, and power is applied to the light path control member as shown in FIG. 27 . In this case, the accommodating part functions as a light transmitting part, so that the display device may be driven in the open mode.

Accordingly, the user can easily drive the display device in the privacy mode or the normal mode according to the application of power.

Also, referring to FIG. 29 , the display device to which the light path control member according to the embodiment is applied may also be applied to the interior of a vehicle.

For example, the display device including the light path control member according to the embodiment may display vehicle information and an image confirming the moving path of the vehicle. The display device may be disposed between a driver's seat and a passenger seat of the vehicle.

In addition, the light path control member according to the embodiment may be applied to an instrument panel that displays a vehicle speed, an engine, and a warning signal.

In addition, the light path control member according to the embodiment may be applied to the windshield FG or left and right window glass of a vehicle.

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, features, structures, effects, etc. illustrated in each embodiment can be combined or modified for other embodiments by those of ordinary skill in the art to which the embodiments belong. Accordingly, the contents related to such combinations and modifications should be interpreted as being included in the scope of the present invention.

In addition, although the embodiments have been described above, these are merely examples and do not limit the present invention, and those of ordinary skill in the art to which the present invention pertains are exemplified above in a range that does not depart from the essential characteristics of the present embodiment. It can be seen that various modifications and applications that have not been made are possible. For example, each component specifically shown in the embodiments may be implemented by modification. And the differences related to these modifications and applications should be construed as being included in the scope of the present invention defined in the appended claims.

Claims (10)

a first substrate;
a first electrode disposed on the first substrate;
a second substrate disposed on the first substrate;
a second electrode disposed under the second substrate; and
and a light conversion unit disposed between the first electrode and the second electrode,
The light conversion unit includes a barrier rib portion and a receiving portion that are alternately arranged,
A light conversion material that changes the transmittance of light is filled inside the accommodating part,
The light conversion material includes a solvent, light conversion particles and liquid crystal,
The liquid crystal is included in an amount of 1 wt% to 10 wt% based on the total weight of the light conversion material. The method of claim 1,
The solvent is an optical path control member having a non-polarity. The method of claim 1,
The solvent is an optical path control member having a polarity. 4. The method of claim 3,
The polarity of the solvent is smaller than the polarity of the liquid crystal. 5. The method of claim 4,
A difference between the polarity of the solvent and the polarity of the liquid crystal is 0.08 to 0.8. The method of claim 1,
A weight ratio of the light conversion particles to the liquid crystal is 1:0.2 to 1:3. display panel; and
a light path control member disposed on the display panel;
The light path control member,
a first substrate;
a first electrode disposed on the first substrate;
a second substrate disposed on the first substrate;
a second electrode disposed under the second substrate; and
and a light conversion unit disposed between the first electrode and the second electrode,
The light conversion unit includes a barrier rib portion and a receiving portion that are alternately arranged,
A light conversion material that changes the transmittance of light is filled inside the accommodating part,
The light conversion material includes a solvent, light conversion particles and liquid crystal,
The liquid crystal is contained in an amount of 1 wt% to 10 wt% with respect to the entire light conversion material. 8. The method of claim 7,
The solvent is a polar or non-polar display device. 9. The method of claim 8,
The solvent has a polarity,
The difference between the polarity of the solvent and the polarity of the liquid crystal is 0.08 to 0.8. The method of claim 1,
A weight ratio of the light conversion particles to the liquid crystal is 1:0.2 to 1:3.

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