KR20210136603A - Light route control member and display having the same - Google Patents

Abstract

According to an embodiment, an optical path control member includes: a first substrate in which first and second directions are defined; a first electrode placed in an upper part of the first substrate; a second substrate which is placed in the upper part of the first substrate, and in which the first and second directions are defined; a second electrode placed in a lower part of the second substrate; an optical conversion part placed between the first and second electrodes; and a dam part placed on the optical conversion part. The optical conversion part includes a plurality of partition parts and a plurality of housing parts placed alternately. The dam part is placed on the partition parts while filling the housing parts at both ends of the second direction of the optical conversion part, which are opposed to each other. The dam part includes a resin composition including a resin substance and nanoparticles. Therefore, the present invention is capable of improving process reliability and reducing the whole size of an optical path control member.

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 windows of vehicles or buildings to partially shield 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, it is possible to control the viewing angle of the user by controlling the transmission angle of light by the light-shielding film.

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 can be implemented by filling the inside of the pattern part with particles that can move according to the application of a voltage and a dispersion liquid 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.

Such a dispersion liquid may be disposed by being injected in a capillary manner inside the intaglio-shaped pattern part. At this time, in order to block both ends of the intaglio-shaped pattern part passing through each other, a dam part for controlling the movement of the dispersion may be disposed at both ends of the pattern part.

At this time, when the width of the dam portion is widened, the distance between the dam portion and the pattern portion is reduced, so it may be difficult to inject the dispersion, and the ineffective area of the optical path control member in which the dispersion is not disposed increases due to the increase in the width of the dam portion. There is a problem being

Accordingly, a light path control member having a new structure capable of solving the above problems is required.

An embodiment is to provide an optical path control member that can be easily manufactured by controlling the height and width of the dam and can reduce the size of the non-effective area.

An optical path control member according to an embodiment includes: a first substrate on which a first direction and a second direction are defined; a first electrode disposed on the first substrate; a second substrate disposed on the first substrate and defining the first direction and the second direction; a second electrode disposed under the second substrate; a light conversion unit disposed between the first electrode and the second electrode; and a dam portion disposed on the light conversion unit, wherein the light conversion unit includes a plurality of barrier rib portions and a plurality of accommodating portions arranged alternately, and the dam portion is an amount of the light conversion portion facing each other in the second direction. The end portion is disposed on the partition wall while filling the receiving portion, and the dam portion includes a resin composition including a resin material and nanoparticles.

The light path control member according to the embodiment may control the width and height of the dam portion disposed to inject the dispersion. In detail, as the dam part is formed of a resin composition containing nanoparticles, the dam part may have thixotropic properties.

Accordingly, when disposing the dam portion with the resin composition, it is possible to minimize a phenomenon in which the resin composition spreads in one direction, thereby reducing the width of the dam portion. In addition, since it is not necessary to reduce the amount of the resin composition in order to reduce the width of the dam portion, the height of the dam portion may be maintained at a predetermined height.

Accordingly, by reducing the width of the dam portion, it is possible to sufficiently secure an injection space for the dispersion liquid, thereby improving the dispersion liquid injection process efficiency, and reducing the width of the dam portion irrelevant to the optical path control, thereby reducing the size of the ineffective region By reducing , it is possible to reduce the overall size of the light path control member.

In addition, by maintaining the height of the dam portion at a constant height, when the dispersion liquid is injected, the dispersion liquid is prevented from overflowing to the outside of the dam portion, thereby improving process reliability.

Also, in the light path control member according to the embodiment, an adhesive layer having a color or an adhesive layer including a reflective material may be disposed at at least one end of the light conversion unit.

Accordingly, the light leakage phenomenon in the lateral direction of the light path control member may be minimized, and thus the front transmittance of the light path control member may be improved.

Accordingly, the light path control member according to the embodiment can be easily manufactured, and reliability and luminance of the light path control member can be improved.

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 8 are views illustrating cross-sectional views taken along area AA′ of FIG. 1 .
9 and 10 are views illustrating cross-sectional views taken along region BB′ of FIG. 1 .
FIG. 11 is a view showing the shape of a dam portion of the light path control member in the direction AA′ or BB′ of FIG. 1 .
12 to 14 are views illustrating cross-sectional views taken along the CC′ region of FIG. 1 .
15 to 17 are cross-sectional views taken along a region DD′ of FIG. 1 .
18 to 20 are views illustrating cross-sectional views taken along region EE′ of FIG. 1 .
21 and 22 are views illustrating other cross-sectional views taken along the region EE′ of FIG. 1 .
23 to 30 are views illustrating a method of manufacturing a light path control member according to an embodiment.
31 is a cross-sectional view of a display device to which a light path control member according to an exemplary embodiment is applied.
32 to 34 are diagrams 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 pertains, 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 terms used in the embodiments of the present invention are for describing the embodiments and are not intended to limit the present invention. In this specification, the singular form may also include the plural form unless otherwise specified in the phrase, and when it is described as "at least one (or more than one) 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 used to distinguish 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 the meaning of not only the upward direction but also 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 one 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 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 description, 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). At least one of gold (Au), titanium (Ti), and alloys thereof may be included.

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 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 one 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 in 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). At least one of gold (Au), titanium (Ti), and alloys thereof may be included.

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 uniform 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 different sizes. In detail, the first substrate 110 and the second substrate 120 may have different size lengths in at least one of a length in the first direction 1A and a length in the second direction 2A. have.

For example, referring to FIGS. 1 and 2 , the first substrate 110 and the second substrate 120 may have different widths in the second direction 2A. In detail, the second width of the second substrate 120 in the second direction 2A may be smaller than the first width of the first substrate 110 in the second direction 2A.

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

That is, both ends of the second substrate 120 in the second direction 2A may be different from both ends of the first substrate 110 in the second direction 2A. Accordingly, one end of the second substrate 120 in the second direction 2A and one end of the first substrate 110 in the second direction 2a may be spaced apart from each other, and the The other end of the second substrate 120 in the second direction 2A and the other end of the first substrate 110 in the second direction 2a may be spaced apart from each other.

Between one end of the second substrate 120 in the second direction 2A and one end of the first substrate 110 in the second direction 2a and the second substrate 120 A dam part 500 and a sealing part 600 to be described below may be disposed between the other end in the second direction 2A and the other end in the second direction 2a of the first substrate 110 . have.

The dam part 500 and the sealing part 600 will be described in detail below.

Meanwhile, the first length extending in the first direction 1A of the first substrate 110 is the same as or similar to the second length extending in the first direction 1A of the second substrate 120 . can have

For example, the length extending in the first direction 1A of the first substrate 110 and the length extending in the first direction 1A of the second substrate 120 have a size of 300 mm to 400 mm. can have

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 the substrates are staggered from 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 protrude in the other direction of 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 and the second electrode exposed from the first protrusion and the second protrusion may include an electrode connection region connected to an external power source.

For example, the first electrode 210 and the second electrode 220 exposed from the protrusions may be connected to the external printed circuit board 620 through the anisotropic conductive material 610 and the pad part 620 . can

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 each side surface corresponds 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 and the second electrode exposed from the first protrusion and the second protrusion may include an electrode connection region connected to an external power source.

The first electrode 210 and the second electrode 220 exposed from the protrusions may be connected to the printed circuit board 650 through the anisotropic conductive material 610 and the pad part 620 .

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 for facilitating adhesion and adhesion are 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 . can be For example, a buffer layer 410 is disposed between the first substrate 110 and the light conversion unit 300 , and an adhesive layer 420 is disposed between the second substrate 120 and the light conversion unit 300 . This can be placed

The light conversion unit 300 may include a plurality of partition walls 310 and a receiving unit 320 extending in one direction. The barrier rib part 310 may be defined as a light transmitting area, and the receiving part 320 may be defined as a light conversion area. In detail, light conversion particles that move according to the application of a voltage may be disposed in the receiving unit, and a path and transmittance of light passing through the receiving unit may be changed by the light converting particles.

A specific driving method of the light conversion unit 300 will be described in detail below.

Hereinafter, the dam portion 500 and the sealing portion 600 of the light path control member according to the embodiment will be described with reference to FIGS. 5 to 11 .

5 to 8 are cross-sectional views illustrating a partition wall portion of the light path control member cut in the second direction.

5 to 8 , a dam part 500 and a sealing part 600 may be disposed on the partition wall part 310 of the light conversion part 300 . In detail, a dam part 500 and a sealing part 600 may be respectively disposed at both ends of the partition wall part 310 in the second direction 2A. That is, at least two or more dam parts 500 and at least two or more sealing parts 600 may be disposed on the partition wall part 310 .

In addition, a second electrode 220 and a second substrate 120 may be disposed on the barrier rib portion 310 of the light conversion unit 300 . In detail, the second electrode 220 is disposed under the second substrate 120 , and an adhesive layer 420 is disposed between the second electrode 220 and the partition wall portion 310 , The electrode 220 and the partition wall part 310 may be adhered.

The second substrate 120 , the second electrode 220 , and the adhesive layer 420 may be disposed between the dam parts 500 facing each other. In addition, the second substrate 120 , the second electrode 220 , and the adhesive layer 420 may be disposed between the sealing parts 600 facing each other. That is, the second substrate 120 , the second electrode 220 , and the adhesive layer 420 may be disposed between the sealing parts 600 disposed between the dam parts 500 .

The dam part 500 and the sealing part 600 may include the same or similar material. For example, the dam part 500 and the sealing part 600 may include a resin material. For example, the dam part 500 and the sealing part 600 may include a material such as urethane acrylate or epoxy.

An area in which the second electrode 220 is disposed may be defined as an effective area, and an area in which the dam part 500 and the sealing part 600 are disposed may be defined as an ineffective area. In detail, the region in which the second electrode 220 is disposed may be defined as an effective region in which the path and transmittance of light change according to the application of voltage, and the region in which the dam part 500 and the sealing part 600 are disposed It can be defined as an ineffective region where the path and transmittance of light are not affected.

That is, an effective region may be formed on the partition wall part 310 between ineffective regions at both ends of the partition wall part 310 . That is, the partition wall part 310 may change from the effective area to the ineffective area direction while extending in the second direction. The second electrode 220 , the sealing part 600 , and the dam part 500 may be sequentially disposed while extending from the effective area to the ineffective area.

The dam part 500 and the sealing part 600 may be disposed at the same or similar height to each other.

Also, the upper surface of the dam part 500 and the upper surface of the sealing part 600 may be disposed on the same or similar plane as the upper surface of the second substrate 120 .

That is, the height of the dam part 500 and the sealing part 600 may be the same as or similar to the total height of the adhesive layer 420 , the second electrode 220 , and the second substrate 120 . In detail, the height of the dam part 500 and the sealing part 600 may be formed to be less than or equal to the total height of the adhesive layer 420 , the second electrode 220 , and the second substrate 120 .

Referring to FIG. 5 , the height of the dam part 500 and the sealing part 600 may be the same as or similar to the total height of the adhesive layer 420 , the second electrode 220 , and the second substrate 120 . have.

Alternatively, referring to FIG. 6 , the height of the dam part 500 and the sealing part 600 may be smaller than the total height of the adhesive layer 420 , the second electrode 220 , and the second substrate 120 . . In detail, the height of the dam part 500 and the sealing part 600 may be smaller than the total height of the adhesive layer 420 , the second electrode 220 , and the second substrate 120 by a first height h1 . have.

For example, the height of the dam part 500 and the sealing part 600 is 80% or more of the total height of the adhesive layer 420 , the second electrode 220 , and the second substrate 120 . can be In more detail, the height of the dam part 500 and the sealing part 600 is 80% to 100% of the total height of the adhesive layer 420 , the second electrode 220 , and the second substrate 120 . can be placed as In more detail, the height of the dam part 500 and the sealing part 600 is 90% to 99% of the total height of the adhesive layer 420 , the second electrode 220 , and the second substrate 120 . can be placed as

When the height of the dam part 500 and the sealing part 600 is less than 80% of the total height of the adhesive layer 420 , the second electrode 220 , and the second substrate 120 , the Due to the decrease in the height of the dam unit 500 , the dispersion may overflow to the outside of the dam during the process, and the sealing characteristics may be deteriorated due to the decrease in the height of the sealing unit 600 . In addition, when the height of the dam part 500 and the sealing part 600 exceeds 100% of the total height of the adhesive layer 420 , the second electrode 220 , and the second substrate 120 . , a light leakage phenomenon may occur on the upper surface of the light path control member due to a step difference between the dam part 500 and the sealing part 600 and the second substrate 120 , thereby reducing luminance.

Meanwhile, referring to FIG. 7 , the dam part 500 may be disposed to be spaced apart from the end of the partition wall part 310 . That is, the dam parts 500 may be disposed to be spaced apart from both ends of the partition wall part 310 , respectively.

For example, the dam parts 500 may be disposed to be spaced apart from both ends of the partition wall part 310 by a predetermined distance s.

Accordingly, on the partition wall part 310, the dam part 500, the sealing part 600, and the adhesive layer 420 are not disposed by the distance s, and an exposed area in which the upper surface of the partition wall part is exposed is formed. can

Such an exposed region may be formed by tolerance in a cutting process when the light path control member is manufactured, and the size of the gap s may be formed to be 3 μm or less.

Referring to FIG. 8 , the sealing part 600 may include a first sealing part 610 and a second sealing part 620 . The first sealing part 610 may be disposed between the dam part 500 and the dispersion liquid 320b. Also, the second sealing part 620 may be disposed at an end of the partition wall part 310 .

Accordingly, the dam part 500 may be disposed between the first sealing part 610 and the second sealing part 620 . The second sealing part 620 may be disposed closer to the end of the partition wall part 310 than the first sealing part 610 . That is, while extending from the effective area to the ineffective area on the partition wall part 310 , that is, extending from the central area of the partition wall part 310 to the end area of the partition wall part 310 , the adhesive layer 420 . , the first sealing part 610 , the dam part 500 , and the second sealing part 620 may be sequentially disposed.

The second sealing part 620 may be disposed between the end of the partition wall part 310 and the dam part 500 to additionally fill an exposed area of the partition wall part 310 according to a tolerance of a manufacturing process.

Accordingly, the formation of the exposed region on the barrier rib portion 310 through the second sealing portion 620 may be prevented, thereby preventing the inflow of external impurities that may penetrate through the exposed region.

9 and 10 are views illustrating cross-sectional views of the receiving part of the light path control member cut in the second direction.

9 and 10 , a light conversion material may be disposed on the receiving unit 320 of the light conversion unit 300 . In detail, the dispersion 320a and the light conversion particles 320b dispersed in the dispersion 320a may be disposed on the receiving part 320 . That is, the accommodating part 320 may include a base layer 321 supporting the accommodating part and an accommodating region 322 in which the dispersion 320a is disposed, and the dispersion 320a and the light conversion particles 320b. ) may be disposed in the receiving area 332 on the base layer 321 .

The light conversion particles 320b may be moved according to the application of voltage to change the transmittance of the light path control member.

The accommodating part 320 may include an area in which the dispersion liquid 320a and the light conversion particles 320b are disposed, and an area in which the dam part 500 and the sealing part 600 are disposed.

In detail, a dam part 500 and a sealing part 600 may be respectively disposed at both ends of the accommodating part 320 based on the second direction 2A. That is, at least two or more dam parts 500 and at least two or more sealing parts 600 may be disposed on the receiving part 320 .

In addition, a second electrode 220 and a second substrate 120 may be disposed on the barrier rib portion 310 of the light conversion unit 300 . The second electrode 220 and the second substrate 120 may be disposed in a region corresponding to the region where the dispersion liquid 320a and the light conversion particle 320b are disposed.

In detail, the second electrode 220 is disposed under the second substrate 120 , and an adhesive layer 420 is disposed between the second electrode 220 and the partition wall portion 310 , The electrode 220 and the partition wall part 310 may be adhered.

The second substrate 120 , the second electrode 220 , the adhesive layer 420 , and the dispersion liquid 320a may be disposed between the dam parts 500 . In addition, the second substrate 120 , the second electrode 220 , the adhesive layer 420 , and the dispersion liquid 320a may be disposed between the sealing parts 600 . That is, the second substrate 120 , the second electrode 220 , the adhesive layer 420 , and the dispersion liquid 320a are disposed between the sealing parts 600 disposed between the dam parts 500 . can be

An area in which the second electrode 220 is disposed may be defined as an effective area, and an area in which the dam part 500 and the sealing part 600 are disposed may be defined as an ineffective area. In detail, the region in which the second electrode 220 is disposed may be defined as an effective region in which the path and transmittance of light change according to the application of voltage, and the region in which the dam part 500 and the sealing part 600 are disposed It can be defined as an ineffective region where the path and transmittance of light are not affected.

That is, an effective region may be formed on the accommodating part 320 between ineffective regions at both ends of the accommodating part 320 . That is, the accommodating part 320 may change from the effective area to the ineffective area while extending in the second direction. The dispersion 320a in which the light conversion particles 320b are dispersed, the sealing part 600 and the dam part 500 may be sequentially arranged while extending from the effective area to the ineffective area.

The dam part 500 and the sealing part 600 may be disposed at the same or similar height to each other.

Also, the upper surface of the dam part 500 and the upper surface of the sealing part 600 may be disposed on the same or similar plane as the upper surface of the second substrate 120 .

That is, the height of the dam part 500 and the sealing part 600 is the same as or similar to the total height of the dispersion liquid 320a, the adhesive layer 420, the second electrode 220, and the second substrate 120. can do. In detail, the height of the dam part 500 and the sealing part 600 is to be formed to be less than the total height of the dispersion liquid 320a, the adhesive layer 420, the second electrode 220, and the second substrate 120. can

Referring to FIG. 9 , the height of the dam part 500 and the sealing part 600 is the total height of the dispersion liquid 320a, the adhesive layer 420 , the second electrode 220 , and the second substrate 120 . may be the same as or similar to

Alternatively, referring to FIG. 6 , the heights of the dam part 500 and the sealing part 600 are the dispersion liquid 320a , the adhesive layer 420 , the second electrode 220 , and the second substrate 120 . It may be less than the total height. In detail, the height of the dam part 500 and the sealing part 600 is a second height than the total height of the dispersion liquid 320a, the adhesive layer 420, the second electrode 220, and the second substrate 120. It can be as small as (h2).

For example, the heights of the dam part 500 and the sealing part 600 are relative to the total height of the dispersion liquid 320a, the adhesive layer 420, the second electrode 220, and the second substrate 120. It can be placed at a height of 80% or more. In more detail, the height of the dam part 500 and the sealing part 600 is 80 with respect to the total height of the dispersion liquid 320a, the adhesive layer 420 , the second electrode 220 , and the second substrate 120 . It can be arranged at a height of % to 100%. In more detail, the height of the dam part 500 and the sealing part 600 is 90 with respect to the total height of the dispersion liquid 320a, the adhesive layer 420 , the second electrode 220 , and the second substrate 120 . It can be placed at a height of % to 99%.

The height of the dam part 500 and the sealing part 600 is less than 80% of the total height of the dispersion liquid 320a, the adhesive layer 420, the second electrode 220, and the second substrate 120. , the dispersion may overflow to the outside of the dam during the process due to a decrease in the height of the dam unit 500 , and sealing characteristics may be deteriorated due to a decrease in the height of the sealing unit 600 . In addition, the height of the dam part 500 and the sealing part 600 is 100 with respect to the total height of the dispersion liquid 320a, the adhesive layer 420 , the second electrode 220 , and the second substrate 120 . %, a light leakage phenomenon may occur due to a step difference between the dam part 500 and the sealing part 600 and the second substrate 120 on the upper surface of the light path control member, thereby reducing luminance. .

Meanwhile, although not shown in the drawings, the dam part 500 may be disposed to be spaced apart from the end of the accommodating part 320 . That is, the above-described FIGS. 7 and 8 and the dam parts 500 may be disposed to be spaced apart from both ends of the accommodating part 320 , respectively.

Accordingly, an exposed region in which the dam part 500 , the sealing part 600 , and the adhesive layer 420 are not disposed may be formed on the receiving part 320 .

In addition, an additional sealing part may be further disposed in the exposed area.

Accordingly, it is possible to prevent an exposed region from being formed on the accommodating portion 320 through the arrangement of the additional sealing portion, thereby preventing the inflow of external impurities that may permeate through the exposed region.

The dam parts 500 disposed at both ends of the partition wall part 310 and the accommodating part 320 described above are formed when the dispersion is injected into the accommodating part 320 .

In detail, when the dispersion 320a is injected into the accommodating part 320, both ends of the accommodating part 320 in the second direction are exposed, so after injecting the dispersion 320a, the The movement of the dispersion liquid 320a may be restricted by disposing the dam unit 500 in the inlet region and the outlet portion of the receiving unit 320 , respectively.

That is, after bonding and disposing the second electrode 220 and the second substrate 120 through the adhesive layer 420 on the partition wall portion 310 and the receiving portion 320 , the second substrate After disposing the dam at positions spaced apart from both ends in the second direction of 120 by a predetermined distance, the dispersion may be injected between the dam and one end of the second substrate 120 in the second direction.

As described above, since the dam part 500 includes a resin material having fluidity, it spreads in the second direction while being disposed on the partition wall part 310 and the receiving part 320 . , the width of the dam part 500 in the second direction may be increased by this characteristic.

At this time, when the width of the dam part 500 increases, the distance between one end of the second substrate 120 in the second direction and the dam part 500 decreases proportionally, resulting in insufficient space to inject the dispersion. Process efficiency may be reduced. In addition, due to the increase in the width of the dam portion, an ineffective area that is not related to the optical path control is increased, so that the overall size of the optical path control member may be increased.

In addition, when a small amount of a material forming the dam unit 500 is disposed in order to alleviate the fluidity of the resin material forming the dam unit 500 , the width of the dam unit 500 may be reduced, but the dam unit 500 ) is reduced together, and accordingly, when injecting the dispersion, there is a problem that the dispersion overflows out of the dam part.

Accordingly, the optical path control member according to the embodiment may increase the width of the dam unit 500 while decreasing the width of the dam unit 500 by imparting thixotrophy to the dam unit.

In detail, in order for the dam unit 500 to have thixotropy, nanoparticles may be added to the resin material constituting the dam unit 500 . In detail, the dam unit 500 may include a resin composition in which a resin material and nanoparticles are mixed. The nanoparticles may include a metal or a non-metal oxide. For example, the nanoparticles may include an oxide such as aluminum oxide (Al ₂ O ₃ ), titanium dioxide (TiO ₂ ), or silicon dioxide (SiO ₂ ).

The nanoparticles may be included in a certain weight % with respect to the entire resin composition. In detail, the nanoparticles may be included in an amount of less than 6% by weight based on the entire resin composition. In more detail, the nanoparticles may be included in an amount of more than 2 wt% to less than 6 wt% with respect to the entire resin composition. In more detail, the nanoparticles may be included in an amount of 3 wt% to 5 wt% with respect to the entire resin composition.

When the nanoparticles are included in an amount of 6 wt % or more based on the total amount of the resin composition, due to a decrease in the aspect ratio (height of the dam part / the width of the dam part) of the dam part 500, the supporting force of the dam part may be reduced. In addition, when the nanoparticles are included in an amount of 2% by weight or less with respect to the total weight of the resin composition, the thixotropy of the dam portion is small and the width of the dam portion is increased, the space for injecting the dispersion is reduced, and the ineffective area is increased. can be

The dam portion 500 of the light path control member according to the embodiment may have thixotropy due to the resin composition including the nanoparticles, and accordingly, the width of the dam portion is 500 μm to 600 μm, and the height of the dam portion is 100 It may have a range from μm to 150 μm. Here, the height of the dam portion may be defined as the highest height of the dam portion.

In addition, the dam portion may have an aspect ratio (height of the dam/width of the dam) of the dam portion 500 in the range of 0.16 to 0.30 in the width and height range.

11 is a view for explaining the shape and size of a dam disposed in the partition wall part 310 and the receiving part 320 of the light conversion part 300 .

11(a) is a view for explaining the height of the dam part 500 disposed in the partition wall part 310 and the receiving part 320, and FIG. 11(b) is the partition wall part 310 and the accommodating part 320. It is a view for explaining the width in the second direction of the dam unit 500 disposed in the receiving unit 320 .

Referring to FIG. 11A , the dam part 500 may have a curved upper surface. In detail, the dam part 500 may be formed in a semicircular shape having a curved surface. That is, the dam part 500 may have a constant maximum height H, and may be formed in a shape in which the height decreases as the distance from the center increases.

Also, referring to FIG. 11B , the dam part 500 may have a first width w1 and a second width w2. The maximum width of the dam portion disposed in each partition wall portion and the receiving portion may be different depending on the viscosity of the resin composition forming the dam portion 500 . In this case, the first width w1 may be defined as a width of the dam unit 500 disposed on all the barrier rib portions and the accommodating portion of the light conversion unit, and the second width w2 is the entire barrier rib of the light conversion unit. It may be defined as the maximum width of the dam portion 500 formed in a portion of the portion and the entire accommodation portion.

The above-described width of the dam unit 500 may be defined as the first width w1 , and the above-described sealing unit 600 may be disposed in an area defined by the second width w2 . That is, at least one of the entire regions of the partition wall part 310 and the accommodating part 320 may include a region where the sealing part 600 is disposed on the dam part 500 .

Hereinafter, the dam unit 500 , the sealing unit 600 , and the light conversion unit 300 of the light path control member according to the embodiment will be described with reference to FIGS. 12 to 22 .

12 to 14 are cross-sectional views illustrating a dam portion of the light path control member cut in the first direction.

12 to 14 , the dam part 500 may be disposed on the partition wall part 310 of the light conversion part 300 . In detail, the dam part 500 may be disposed on the partition wall part 310 while filling the receiving part 320 of the light conversion part 300 .

A sealing part 600 and a dispersion liquid 320a, which will be described below, may be disposed together in each receiving part 320 in which the dam part 500 is disposed. That is, the dispersion liquid 320a, the sealing part 600, and the dam part 500 may be sequentially disposed in each receiving part 320 in a direction away from the central region of the light path control member.

Referring to FIG. 12 , a length of the dam unit 500 in the first direction may be the same as a length of the light conversion unit 300 in the first direction.

Alternatively, referring to FIGS. 13 and 14 , the length of the dam unit 500 in the first direction may be different from the length of the light conversion unit 300 in the first direction.

In detail, referring to FIGS. 13 and 14 , the length of the dam unit 500 in the first direction may be smaller than the length of the light conversion unit 300 in the first direction.

For example, referring to FIG. 13 , a length of the dam unit 500 in the first direction may be smaller than a length of the light conversion unit 300 in the first direction. That is, the length of the dam unit 500 in the first direction may be the same as the distance from the receiving unit at one end of the light conversion unit 300 in the first direction to the receiving unit at the other end of the light conversion unit 300 . Accordingly, the light conversion unit 300 may include a partition wall unit 320 in which the dam unit 500 is not disposed. That is, the barrier rib portions at one end and the other end of the light conversion unit 300 in the first direction may include an exposed area EA in which the dam unit 500 is not disposed.

Alternatively, referring to FIG. 14 , a length of the dam unit 500 in the first direction may be smaller than a distance from one end of the light conversion unit 300 in the first direction to the other end. That is, the dam part 500 may be partially disposed on the partition wall part 310 at one end and the partition wall part 310 at the other end in the first direction of the light conversion part 300 .

Accordingly, the light conversion unit 300 may include a partition wall unit 320 in which the dam unit 500 is not disposed. That is, the partition wall portions at one end and the other end of the light conversion unit 300 in the first direction include an area in which the dam unit 500 is disposed and an area in which the light conversion unit is disposed. The partition wall portions at one end and the other end of 300 in the first direction may include an exposed area EA in which the dam unit 500 is not disposed.

15 to 17 are cross-sectional views illustrating a sealing part of the light path control member cut in the first direction.

15 to 17 , the sealing part 600 may be disposed on the partition wall part 310 of the light conversion part 300 . In detail, the sealing part 600 may be disposed on the partition wall part 310 while filling the receiving part 320 of the light conversion part 300 .

In each receiving part 320 in which the sealing part 600 is disposed, it may be disposed between the dispersion liquid 320a and the dam part 500 . The sealing part 600 is disposed in contact with the dispersion liquid 320a, and may prevent the inflow of external impurities that may permeate into the dispersion liquid 320a.

Referring to FIG. 15 , the length of the sealing part 600 in the first direction may be the same as the length of the light conversion part 300 in the first direction.

Alternatively, referring to FIGS. 16 and 17 , the length of the sealing part 600 in the first direction may be different from the length of the light conversion part 300 in the first direction.

In detail, referring to FIGS. 16 and 17 , a length of the dam unit 500 in the first direction may be smaller than a length of the light conversion unit 300 in the first direction.

For example, referring to FIG. 16 , the length of the sealing part 600 in the first direction is the distance from the receiving part at one end of the light conversion part 300 in the first direction to the receiving part at the other end of the light conversion part 300 . can have size. Accordingly, the light conversion unit 300 may include a partition wall portion 320 in which the sealing portion 600 is not disposed. That is, the barrier rib portions at one end and the other end of the light conversion unit 300 in the first direction may include an exposed area EA in which the sealing unit 600 is not disposed.

Alternatively, referring to FIG. 17 , a length of the sealing unit 600 in the first direction may be smaller than a distance from one end of the light conversion unit 300 in the first direction to the other end. That is, the sealing part 600 may be partially disposed on the partition wall part 310 at one end and the partition wall part 310 at the other end in the first direction of the light conversion part 300 .

Accordingly, the light conversion unit 300 may include a partition wall portion 320 in which the sealing portion 600 is not disposed. That is, the partition wall portions at one end and the other end of the light conversion unit 300 in the first direction include a region where the sealing unit 600 is disposed and a region where it is disposed. The partition wall portions at one end and the other end of the portion 300 in the first direction may include an exposed area EA in which the sealing portion 600 is not disposed.

18 to 20 are views illustrating cross-sectional views of the receiving part in which the dispersion liquid is disposed in the light path control member cut in the first direction.

18 to 20 , 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 dividing the 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 receiving 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 of the accommodating portions 320 may be disposed between the adjacent partition wall portions 310 .

The partition wall part 310 may include a transparent material. The barrier rib part 310 may include a material capable of transmitting 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. 18 to 20 , 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 .

The accommodating part 320 may include a dispersion 320a and light conversion particles 320b. Specifically, the accommodating part 320 is filled by injecting the dispersion 320a into the dispersion 320a. A plurality of light conversion particles 320b may be dispersed.

The dispersion liquid 320a may be a material for dispersing the light conversion particles 320b. The dispersion 320a may include a transparent material. The dispersion 320a may include a non-polar solvent. In addition, the dispersion 320a may include a material capable of transmitting light. For example, the dispersion liquid 320a may include at least one of a halocarbon-based oil, a paraffin-based oil, and isopropyl alcohol.

The light conversion particles 320b may be dispersed in the dispersion 320a. In detail, the plurality of light conversion particles 320b may be disposed to be spaced apart from each other in the dispersion 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 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 be 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 310 and the accommodating part 320 . 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 transmitting part, is 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 receiving 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 10 of the accommodating part 320 are uniformly dispersed in the dispersion 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 10 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 negatively charged light conversion particles 320b may move toward the positive electrode of the first electrode 210 and the second electrode 220 using the dispersion 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. 18 , the light conversion particle 10 is the first electrode in the dispersion 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. 19 , the light conversion particles 320b are uniformly dispersed in the dispersion liquid 320a. Thus, the accommodating part 320 may be driven as a light blocking part.

Meanwhile, a printed circuit board 750 connected to an external power source may be connected to the first electrode 210 and the second electrode 220 . In detail, an electrode connection portion is disposed on the first electrode 210 and the second electrode 220 disposed in the protrusion direction of the first substrate 110 and the second substrate 120 , and on the electrode connection portion By disposing a conductive material on the surface, the electrode connection part and the pad part 720 of the printed circuit board 750 may be connected. For example, by disposing an anisotropic conductive material 710 on the electrode connection part, and connecting the anisotropic conductive material 710 and the pad part 720 of the printed circuit board 750, the first electrode 210 and the second electrode 220 and the printed circuit board 750 may be electrically connected.

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 in which the user requires a wide viewing angle and high luminance, a 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.

Meanwhile, referring to FIG. 21 , the light path control member may include a first adhesive layer 421 and a second adhesive layer 422 . Specifically, the plurality of accommodating parts 320 extending in the second direction and spaced apart from each other in the first direction include a first accommodating part in which the dispersion is disposed and a second accommodating part in which the dispersion is not disposed, and The first adhesive layer 421 may be disposed on the first accommodating part, and the second adhesive layer 422 may be disposed on the partition wall part while filling the second accommodating part.

In detail, the first adhesive layer 421 may be disposed on the partition wall part 310 and the first accommodation part. In detail, the first adhesive layer 421 may be disposed on the first accommodating parts in which the dispersion 320a in which the light conversion particles 320b are dispersed among the plurality of accommodating parts is disposed. Accordingly, the first adhesive layer 421 may be disposed in contact with the dispersion 320a.

In addition, the second adhesive layer 421 may be disposed on the partition wall part 310 and the second accommodation part. In detail, the first adhesive layer 421 may be disposed on the second accommodating parts in which the dispersion 320a in which the light conversion particles 320b are dispersed among the plurality of accommodating parts is not disposed. Accordingly, the second adhesive layer 422 may be disposed while filling the inside of the second accommodating part.

The second adhesive layer 422 may be disposed while filling an accommodation portion in which the dispersion is not disposed among the plurality of accommodation portions. That is, the second adhesive layer 422 may be disposed while filling the accommodating parts disposed at at least one of both ends of the first direction among the plurality of accommodating parts. Accordingly, the adhesion area between the light conversion unit 300 and the second electrode 220 may be increased, thereby improving adhesion between the light conversion unit 300 and the second electrode 220 .

The first adhesive layer 421 and the second adhesive layer 422 may include different colors. For example, the first adhesive layer 421 may include a transparent color. Accordingly, the light may be emitted toward the second substrate while maintaining the transmittance of the light converted through the accommodating part and the barrier rib part.

The second adhesive layer 422 may include a colored material. In detail, the second adhesive layer 422 may include a black-based color. Accordingly, it is possible to prevent light from being transmitted in the lateral direction of the light path control member by the second adhesive layer 422 . Accordingly, it is possible to prevent light leakage in the lateral direction of the optical path control member, thereby improving the front luminance of the optical path control member.

In addition, the second adhesive layer 422 may include a reflective material. For example, the second adhesive layer 422 may include metal particles, or a reflective layer may be disposed on the surface of the second adhesive layer 422 .

Accordingly, the light transmitted in the lateral direction of the light path control member by the second adhesive layer 422 may be reflected. Accordingly, it is possible to prevent light leakage in the lateral direction of the optical path control member, thereby improving the front luminance of the optical path control member.

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

Referring to FIG. 21 , in the light path control member according to another embodiment, both ends of the receiving part 320 may be disposed in contact with the buffer layer 410 and the adhesive layer 420 differently from FIGS. 18 and 19 .

For example, a lower portion of the receiving portion 320 may be disposed in contact with the buffer layer 410 , and an 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 may be 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 FIG. 22 , in the light path control member according to the embodiment, unlike FIGS. 18 and 19 , the receiving part 320 may be disposed while having a constant inclination angle θ.

In detail, referring to FIG. 22 , the accommodating part 320 may be disposed with 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 width and height of the dam portion disposed to inject the dispersion. In detail, as the dam part is formed of a resin composition containing nanoparticles, the dam part may have thixotropic properties.

Accordingly, when disposing the dam portion with the resin composition, it is possible to minimize a phenomenon in which the resin composition spreads in one direction, thereby reducing the width of the dam portion. In addition, since it is not necessary to reduce the amount of the resin composition in order to reduce the width of the dam portion, the height of the dam portion may be maintained at a predetermined height.

Accordingly, by reducing the width of the dam portion, it is possible to sufficiently secure an injection space for the dispersion liquid, thereby improving the dispersion liquid injection process efficiency, and reducing the width of the dam portion irrelevant to the optical path control, thereby reducing the size of the ineffective region By reducing , it is possible to reduce the overall size of the light path control member.

In addition, by maintaining the height of the dam portion at a constant height, when the dispersion liquid is injected, the dispersion liquid is prevented from overflowing to the outside of the dam portion, thereby improving process reliability.

Also, in the light path control member according to the embodiment, an adhesive layer having a color or an adhesive layer including a reflective material may be disposed at at least one end of the light conversion unit.

Accordingly, the light leakage phenomenon in the lateral direction of the light path control member may be minimized, and thus the front transmittance of the light path control member may be improved.

Accordingly, the light path control member according to the embodiment can be easily manufactured, and reliability and luminance of the light path control member can be improved.

Hereinafter, a method of manufacturing the light path control member according to the embodiment will be described with reference to FIGS. 23 to 30 .

Referring to FIG. 23 , an electrode material 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. 24 , 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 applying 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 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-, an alkyl group c 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 an organic material.

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. Also, when the buffer layer 410 is disposed on the first electrode 210 , a region to which the buffer layer 410 is exposed may be formed.

Subsequently, referring to FIG. 25 , the resin layer 350 may be patterned to form a plurality of partition wall portions 310 and a plurality of accommodation portions 320 on 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 portion 310 between the intaglio portions.

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

Next, referring to FIG. 26 , 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 .

Subsequently, the second substrate 120 and the light conversion unit 300 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 through the adhesive layer 420 . The light conversion unit 300 may be adhered.

In this case, since the width of the second substrate 120 is smaller than the width of the first substrate 110 , the second substrate 120 partially exposes the barrier rib portion and the receiving portion of the light conversion unit 300 and adheres. can be

Then, referring to FIG. 27 , the dam part 500 may be disposed on the exposed partition wall part and the receiving part. In detail, the dam units 500 may be disposed at both ends of the light conversion unit 300 in the width direction, respectively.

The dam part 500 may be disposed on the partition wall part while filling the inside of the accommodating part.

The dam part 500 may include a resin material and nanoparticles as described above. Accordingly, the dam part 500 may have thixotropy due to the nanoparticles, and the dam part 500 having the thixotropy may be formed in the above-described width and height range.

Subsequently, referring to FIG. 28 , a light conversion material 325 may be implanted in a region between the dam part 500 and the second substrate 120 . In detail, after designating a space between the injection part and the other one between the dam part 500 and the second substrate 120 formed at both ends of the light conversion part 300 in the width direction as an exit part, , the light conversion material 325 may be injected in the direction of the exit part through the injection part.

The light conversion material may be injected from the injection part toward the exit part through a capillary injection method.

Then, referring to FIG. 29 , a sealing part 600 may be disposed in the partition wall part and the receiving part. In detail, the sealing part 600 may be disposed in a region between the dam part 500 and the second substrate 120 .

The sealing part 600 may be disposed while filling the inside of the accommodation part in a region between the dam part 500 and the second substrate 120 . Also, it may be disposed in contact with the light conversion material 325 inside each of the accommodating units.

Accordingly, the injection part and the outlet part of the accommodating part may be sealed by the sealing part 600 to fix the light conversion material 325 to the inside of the accommodating part.

Subsequently, referring to FIG. 30 , the electrode is exposed by partially removing 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 . An electrode connection part CA may be formed.

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, although not shown in the drawings, a sealing part may be additionally disposed through a sealing material. In detail, the sealing part 500 is disposed on any one of the respective side surfaces extending in the first direction and the respective side surfaces extending in the second direction of the light path control member to seal the light path control member. Characteristics can be strengthened.

Hereinafter, the present invention will be described in more detail through the composition of the dam portion of the light path control member according to the embodiments and comparative examples. These embodiments are merely presented as examples in order to explain the present invention in more detail. Therefore, the present invention is not limited to these examples.

Example

A light path control member was manufactured by the method of manufacturing the light path control member.

At this time, the dam portion was formed of a resin composition including urethane acrylate and silicon dioxide particles.

At this time, the silicon dioxide particles were added in an amount of 4% by weight based on the entire resin composition.

Then, the viscosity, width, height, and aspect ratio of the dam part were measured, and the first width and the second width described above were respectively measured for the width.

Comparative Example 1

A light path control member was prepared in the same manner as in Example except that the silicon dioxide particles were added in an amount of 2 wt% based on the total amount of the resin composition, and the viscosity, width, height, and aspect ratio of the dam part were measured.

Comparative Example 2

An optical path control member was prepared in the same manner as in Example except that the silicon dioxide particles were added in an amount of 6 wt% based on the total resin composition, and the viscosity, width, height, and aspect ratio of the dam part were measured.

Comparative Example 3

Except that the silicon dioxide particles were not included in the resin composition, a light path control member was prepared in the same manner as in Example, and the viscosity, width, height, and aspect ratio of the dam part were measured.

Viscosity (cps) first width (μm) second width (μm) Height (㎛) aspect ratio
(height/width) Example 1300 563.1 830.8 125.8 0.22 Comparative Example 1 870 820.3 1499.6 138.6 0.16 Comparative Example 2 2370 450.1 694.3 92.8 0.15 Comparative Example 3 660 1048.9 1606.4 178.1 0.17

Referring to Table 1, since the dam portion of the light path control member according to the embodiment has an appropriate height and width of the dam portion, it is possible to prevent an increase in the area of the ineffective area due to the dam portion, and the dispersion liquid overflows out of the dam portion it can be prevented

On the other hand, the dam portion of the light path control member according to Comparative Examples 1 and 3 has a problem in that the area of the ineffective region increases due to an increase in the width of the dam portion. The drop in height may cause the dispersion to overflow out of the dam.

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. 31 to 34 .

Referring to FIG. 31 , 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. Also, 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. Also, 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 of the .

32 and 34 , the light path control member according to the embodiment may be applied to various display devices.

32 and 32 , 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. 32 , the receiving 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 controlling member as shown in FIG. 22 . 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 apparatus in the privacy mode or the normal mode according to the application of power.

Also, referring to FIG. 34 , 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 a 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 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 (12)

a first substrate on which a first direction and a second direction are defined;
a first electrode disposed on the first substrate;
a second substrate disposed on the first substrate and defining the first direction and the second direction;
a second electrode disposed under the second substrate;
a light conversion unit disposed between the first electrode and the second electrode; and
and a dam unit disposed on the light conversion unit,
The light conversion unit includes a plurality of barrier rib portions and a plurality of accommodation portions arranged alternately,
The dam portion is disposed on the partition wall portion while filling the receiving portion at both ends of the light conversion portion in the second direction facing each other,
The dam portion is an optical path control member comprising a resin composition including a resin material and nanoparticles. The method of claim 1,
The nanoparticles include a metal oxide or a non-metal oxide,
The nanoparticles are light path control member that is included in an amount of more than 2 wt% to less than 6 wt% with respect to the entire resin composition. The method of claim 1,
The width of the dam portion is 500㎛ to 600㎛,
The height of the dam portion is 100㎛ to 150㎛ light path control member. The method of claim 1,
Further comprising an adhesive layer between the light conversion unit and the second electrode,
The height of at least one of the dam portion and the sealing portion on the partition wall portion is 80% to 100% of the total height of the adhesive layer, the second electrode, and the second substrate. The method of claim 1,
The height of at least one of the dam portion and the sealing portion on the accommodating portion is 80% to 100% of the total height of the dispersion, the adhesive layer, the second electrode, and the second substrate. The method of claim 1,
The plurality of receiving portions extend in the second direction,
A dispersion and light conversion particles dispersed in the dispersion are disposed in at least one of the plurality of accommodating parts,
The accommodating part includes an effective area in which the dispersion is disposed and an ineffective area in which at least one of the sealing part and the dam part is disposed,
Each of the receiving portions extends from the effective region to the ineffective region, and the dispersion liquid, the sealing portion, and the dam portion are sequentially disposed. 7. The method of claim 6
The dam part is disposed to be spaced apart from at least one end of both ends of the light conversion part in the second direction,
The sealing part includes a first sealing part between the dispersion and the dam part;
and a second sealing part between the dam part and an end of the light conversion part. The method of claim 1,
Further comprising an adhesive layer between the light conversion unit and the second electrode,
The plurality of receiving portions are disposed to be spaced apart from each other in the first direction,
The plurality of accommodating parts includes a first accommodating part in which the dispersion is disposed and a second accommodating part in which the dispersion is not disposed,
The second accommodating part is disposed at at least one end of both ends of the light conversion part in the first direction,
wherein the adhesive layer includes a first adhesive layer disposed on the first accommodating part and a second adhesive layer disposed while filling the second accommodating part. 9. The method of claim 8,
The second adhesive layer may include a colored material. 9. The method of claim 8,
A light path control member having a reflective layer disposed on a surface of the second adhesive layer. display panel and;
a light path control member disposed on the display panel;
The light path control member,
a first substrate on which a first direction and a second direction are defined;
a first electrode disposed on the first substrate;
a second substrate disposed on the first substrate and defining the first direction and the second direction;
a second electrode disposed under the second substrate;
a light conversion unit disposed between the first electrode and the second electrode; and
and a dam unit disposed on the light conversion unit,
The light conversion unit includes a plurality of barrier rib portions and a plurality of accommodation portions arranged alternately,
The dam portion is disposed on the partition wall portion while filling the receiving portion at both ends of the light conversion portion in the second direction facing each other,
The dam part comprises a resin composition comprising a resin material and nanoparticles,
The nanoparticles include a metal oxide or a non-metal oxide,
The nanoparticles are included in an amount of more than 2 wt% to less than 6 wt% with respect to the entire resin composition. 12. The method of claim 11,
Further comprising an adhesive layer between the light conversion unit and the second electrode,
The plurality of receiving portions are disposed to be spaced apart from each other in the first direction,
The plurality of accommodating parts includes a first accommodating part in which the dispersion is disposed and a second accommodating part in which the dispersion is not disposed,
The second accommodating part is disposed at at least one end of both ends of the light conversion part in the first direction,
The adhesive layer includes a first adhesive layer disposed on the first accommodating part and a second adhesive layer disposed while filling the second accommodating part,
The second adhesive layer includes a colored material or a reflective layer.

Images