KR20210136245A - Light route control member and display having the same - Google Patents

Abstract

In accordance with an embodiment, a light path control member includes: a first substrate; a first electrode placed on the first substrate; a light conversion part placed on the first electrode; a second substrate placed on the first substrate; a second electrode placed in a lower part of the second substrate; and an adhesive layer placed between the light conversion part and the second electrode. The light conversion part includes a partition part and an accepting part which are alternately placed. The accepting part has light transmissivity varying depending on the application of a voltage. The adhesive layer includes a first interface between an upper side of the adhesive layer and the second electrode and a second interface between a lower side of the adhesive layer and the light conversion part. The partition part includes a first area from an upper side of the partition part toward the first substrate by up to 30㎛, a third area from a lower side of the partition part toward the second direction by up to 30㎛, and a second area between the first and second third areas. Si measured as XPS in the first area is no more than 2 at%. Therefore, the present invention is capable of preventing a haze change over time.

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.

In order to prevent overflow of the filler, a light conversion unit having a barrier rib may be manufactured using a photo-curable resin. In this case, the photo-curable resin may include an additive for improving releasability or electrical properties. These additives may migrate on the surface of the resin, and thus the optical properties of the resin may deteriorate over time, and there is a problem in that the adhesion between the resin and the adhesive layer is reduced.

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

The embodiment relates to an optical path control member having improved reliability by improving adhesive properties. Further, the embodiment may provide a light path control member with improved optical properties.

An optical path control member according to an embodiment includes: a first substrate; a first electrode disposed on the first substrate; a light conversion unit disposed on the first electrode; a second substrate disposed on the first substrate; a second electrode disposed under the second substrate; and an adhesive layer disposed between the light conversion unit and the second electrode, wherein the light conversion unit includes a barrier rib portion and a receiving unit which are alternately arranged, and the light transmittance of the receiving unit is changed according to the application of a voltage, The adhesive layer includes a first interface between the upper surface of the adhesive layer and the second electrode and a second interface between the lower surface of the adhesive layer and the light conversion part, wherein the barrier rib part includes the first interface from the upper surface of the barrier rib part. a first region up to 30 μm in a substrate direction, a third region up to 30 μm in a direction from a lower surface of the barrier rib portion in a direction of the second substrate, and a second region between the first region and the third region, Si measured by XPS in the first region is 2 at% or less. A display device according to an embodiment includes a display panel; and a light path control member disposed on the display panel, wherein the light path control member includes: a first substrate; a first electrode disposed on the first substrate; a light conversion unit disposed on the first electrode; a second substrate disposed on the first substrate; a second electrode disposed under the second substrate; and an adhesive layer disposed between the light conversion unit and the second electrode, wherein the light conversion unit includes a barrier rib portion and a receiving unit which are alternately arranged, and the light transmittance of the receiving unit is changed according to the application of a voltage, The adhesive layer includes a first interface between the upper surface of the adhesive layer and the second electrode and a second interface between the lower surface of the adhesive layer and the light conversion part, wherein the barrier rib part includes the first interface from the upper surface of the barrier rib part. a first region up to 30 μm in a substrate direction, a third region up to 30 μm in a direction from a lower surface of the barrier rib portion in a direction of the second substrate, and a second region between the first region and the third region, Si measured by XPS in the first region is 2 at% or less.

The light path control member according to the embodiment may improve adhesion and adhesion characteristics of an adhesive layer for adhering the first substrate and the second substrate.

The embodiment may improve the adhesion between the partition wall portion and the adhesive layer by changing the composition of the photocurable resin used to accommodate the light conversion material and prevent overflow of the light conversion material. In detail, the embodiment may reduce the content of the additive included in order to improve the releasability or electrical properties of the photocurable resin. Accordingly, the embodiment may prevent film removal or peeling between the partition wall portion and the adhesive layer according to the movement of the additive included in the resin.

In addition, the embodiment may prevent deterioration of optical properties due to the migration of additives in the photo-curable resin to the surface of the photo-curable resin over time. That is, the embodiment can prevent haze change over time.

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.
FIG. 5 is a view showing a cross-sectional view taken along area AA′ of FIG. 1 .
6 is a graph showing XPS measurement results of Comparative Examples.
7 is a graph showing the adhesive force test results of Comparative Examples and Examples.
8 to 11 are views illustrating cross-sectional views taken along area AA′ of FIG. 1 for explaining various shapes of accommodation portions in the light path control member according to the embodiment.
12 to 18 are views for explaining a method of manufacturing a light path control member according to an embodiment.
19 is a cross-sectional view of a display device to which a light path control member according to an exemplary embodiment is applied.
20 to 22 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 include 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 a width direction of the first substrate 110 , and the second direction 2A may be perpendicular to the first direction 1A of the first substrate 110 . may be defined in a length direction of , and the third direction 3A may be defined as a 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 sizes corresponding to each other. The first substrate 110 and the second substrate 120 may have the same or similar size to each other.

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

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

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

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

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

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

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

In detail, the first substrate 110 and the second substrate 120 may be disposed at positions crossing each other in the first direction 1A. In detail, the first substrate 110 and the second substrate 120 may be disposed so that the side surfaces of 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 210 and the second electrode 220 exposed from the protrusions may be connected to an external printed circuit board through a pad part, which will be described below.

Alternatively, referring to FIG. 2 , the first substrate 110 and the second substrate 120 may be disposed at positions corresponding to each other. In detail, the first substrate 110 and the second substrate 120 may be arranged so that 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 210 and the second electrode 220 exposed from the protrusions may be connected to an external printed circuit board through a connection part to be described below.

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

An adhesive layer or a buffer layer may be disposed between the light conversion unit 300 and the first substrate 110 or between at least one of the light conversion unit 300 and the second substrate 120 , and the adhesive layer and/or the first substrate 110 , the second substrate 120 , and the light conversion unit 300 may be adhered to each other by a buffer layer.

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

The size of the light conversion unit 300 may be smaller than the size of at least one of the first substrate 110 and the second substrate 120 .

In detail, the length of the light conversion unit 300 in the first direction may be smaller than the length of at least one of the first substrate 110 and the second substrate 120 in the first direction.

In addition, the width of the light conversion unit 300 in the second direction may be the same as or smaller than the width of at least one of the first substrate 110 and the second substrate 120 in the second direction.

In addition, at least one end of both ends of the first substrate 110 and the second substrate 120 in the first direction is disposed outside the both ends of the light conversion unit 300 in the first direction. can

Accordingly, the sealing portion (not shown in the drawing) can be easily disposed, and the adhesive properties of the sealing portion can be improved.

An improvement in the adhesive properties of the light path member according to the embodiment will be described with reference to FIG. 5 .

The light path member according to the embodiment may include a light change material. For example, the light converting material 320' may be an EPD ink. In order to accommodate the light conversion material 320 ′ and prevent overflow, the light conversion unit 300 may be used. The light conversion unit 300 may include a receiving unit 320 for accommodating the light conversion material 320 ′ and a barrier rib portion 310 for preventing the light conversion material 320 ′ from overflowing.

The light conversion unit 300 may be formed of a photo-curable resin. For example, the light conversion unit 300 may be formed by imprinting a photocurable resin. That is, the partition wall part 310 and the accommodating part 320 may be formed of a photo-curable resin.

In detail, 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 partition wall part 310 may include a urethane resin or the like.

The photocurable resin may include an oligomer, a monomer, a photopolymerization initiator, and an additive. The photocurable resin may constitute a light conversion part by the reaction of the polymer-type prepolymer with the diluent, the polyfunctional monomer, and the photopolymerization initiator. E.g,

Here, the additive may refer to various materials for improving the releasability or electrical properties of the photo-curable resin. For example, the additive may refer to various materials including release additives and antistatic agents.

The additive has a property of moving to the surface of the resin with the passage of time. Such movement of the additive may cause a problem of lowering the optical properties of the light path member. In addition, the movement of the additive may reduce the adhesive force between the additive and the partition wall portion.

In the embodiment, in order to reduce the movement of the additive, various factors such as the composition or constituent material of the photo-curable resin constituting the partition wall portion may be changed.

The photo-curable resin may include a polymer backbone having a high crosslinking density. Here, the crosslinking density can be measured using a swelling method.

The higher the crosslinking density of the photo-curable resin, the less the solvent molecules can penetrate between the polymer. Accordingly, the higher the crosslinking density, the lower the swelling ratio (swelling %).

The swelling ratio can be calculated by the following formula.

Here, each function may mean the following.

Q = swelling ratio

Ws = weight of swollen crosslinked material

Wu = weight of unswelled crosslinked product

Wsol = weight of swelling solvent

The photo-curable resin according to the embodiment may have a swelling ratio of 10% or less.

When the swelling ratio of the photo-curable resin is more than 10%, the crosslinking density is relatively low, so that the amount of solvent molecules that can penetrate between the polymers may increase. Accordingly, the amount that the additive can penetrate between the rubber chains of the photo-curable resin can be increased. Therefore, when the swelling ratio of the photo-curable resin is more than 10%, the adhesive properties and optical properties may be deteriorated.

That is, in the embodiment, the crosslinking density of the photo-curable resin, which is a material for forming the barrier rib portion, may be high. Therefore, the amount of penetration of the additive between the chains of the photo-curable resin can be small. Accordingly, the adhesive force between the adhesive layer and the barrier rib portion in the light path control member may be improved. In addition, the embodiment may prevent deterioration of optical properties due to the migration of additives in the photo-curable resin to the surface of the photo-curable resin over time. Accordingly, haze of the light path control member may be improved.

The photo-curable resin may include a urethane acrylate polymer. For example, the oligomer may include urethane acrylate.

The monomer may have 5 or more branches. In the embodiment, as the number of functional groups of the monomer increases, crosslinking may be increased, and thus the crosslinking density may be increased.

The monomer may be a polyfunctional monomer. The polyfunctional monomer may have 5 or more branches of a functional group. Here, the number of branches may mean that the number of each branch connected to the main chain is 5 or more. For example, the number of branches of the monomer may be 5-7. For example, the monomer may have 5 to 6 branches.

When the number of branches of the monomer is 5 or more, the chain length of the polymer is shortened and the crosslinking density can be improved as it is contracted. The embodiment may include a monomer having 5 or more branches, so that the swelling ratio may have a value of 10% or less.

When the number of branches of the monomer is less than 5, the crosslinking density of the polymer may decrease. Accordingly, when the barrier rib is formed of a material having less than five branches of the monomer, there may be a problem in that the adhesive properties and optical properties of the optical path control member are deteriorated.

When the photo-curable resin is 100% by weight, the additive may be included in an amount of 0.5% by weight or less. In the embodiment, since the additive in the photo-curable resin is included in an amount of 0.5 wt % or less, the amount of movement of the additive on the partition wall portion may be reduced.

When the amount of the additive is greater than 0.5% by weight, there may be a problem in that the additive may migrate to the surface of the photo-curable resin.

Here, the additive may include an antistatic agent and a non-reactive release additive in the form of a siloxane product.

For example, the non-reactive release additive may be a Si-containing material such as PDMS.

For example, the antistatic agent may be an F containing material.

In the embodiment, XPS is measured in the depth direction of the partition wall from the interface between the upper surface 310T of the partition wall and the lower surface 420B of the adhesive layer to determine the content of other additives at the location of the partition wall. Through the XPS device, it is possible to check the content of the additive in the region located inside by the thickness of the partition wall.

For example, by etching from the upper surface of the barrier rib portion, the surface of the barrier rib portion may be gradually etched, and the content of the additive in the region located inside the barrier rib portion may be checked. When the etching time is short, the content of the additive in the first region can be checked, and when the etching time is long, the content of the additive in the third region can be checked.

For example, in the embodiment, while etching the upper surface of the barrier rib portion, the content of the additive positioned inside the barrier rib portion may be checked according to the etching time.

That is, when the etching time of the barrier rib portion is 0, the content of Si and F indicated on the surface of the barrier rib portion can be confirmed.

For example, when the etching time of the barrier rib portion is less than about 300 seconds, the content of the additive included in the barrier rib portion in a region close to the surface of the barrier rib portion may be checked.

For example, when the etching time of the barrier rib portion is about 300 seconds to 1000 seconds, the content of the additive included in the barrier rib portion in the middle portion of the barrier rib portion may be checked.

For example, when the etching time of the barrier rib portion is greater than about 1000 seconds, the content of the additive included in the barrier rib portion in the portion of the base layer located close to the first electrode of the barrier rib portion may be checked.

The partition wall portion 310 may be divided into a first region that is a surface part of the resin, a second region that is an intermediate part, and a third region that is a base layer part according to the depth. In detail, the barrier rib part includes a first region P1 from the upper surface 310T of the barrier rib part to a depth of 30 µm, a third region P3 from a lower surface of the barrier rib part to 30 µm in a depth direction, and the It may include a second area between the first area and the third area.

The barrier rib part includes a first region P1 from the upper surface of the barrier rib part to 30 µm in the direction of the first substrate, and a third region P3 from the lower surface of the barrier rib part to 30 µm in the direction of the second substrate; and a second region P2 between the first region and the third region. Accordingly, the partition wall portion having various thickness ranges may include the first region, the second region, and the third region. Alternatively, the partition wall portion may include a first region and a third region.

For example, the second region P2 may be a region between 30 μm and 60 μm in a depth direction from the upper surface of the partition wall portion. The third region P3 may include a region between 60 μm and 95 μm in a depth direction from the upper surface of the partition wall portion.

5 and 6, the difference in the degree of movement of the additive in Comparative Examples and Examples will be described in detail.

Here, at% of Si represents the content and the degree of movement of the non-reactive release additive according to the position, and at% of F may represent the content and degree of movement of the antistatic agent.

6 is a graph showing XPS results for each depth of a partition wall portion measured in Comparative Example.

The XPS result is a measurement of the at% content of Si, and the content of Si contained in the additive can be an evaluation criterion that can measure the movement of Si.

In the XPS measurement result, the x-axis may represent etching time, and the y-axis may represent at% of Si.

That is, the XPS measurement result may indicate the content of elements such as Si and F according to the depth of the barrier rib portion as the etching time elapses.

In the first region P1 of the comparative example, Si may have a content of more than 2at%.

In the comparative example, the content of Si and F in the first region may represent more than 2.6at%.

In the comparative example, it can be seen that the Si content in the first region P1 is significantly higher than that of the second region P2 and the third region P3. That is, in the comparative example, it can be seen that the amount of movement of the additive between the interface between the adhesive layer and the partition wall portion is large.

Referring to FIG. 6 , in the comparative example, it can be seen that the content of Si measured in the first region P1 is 1.5 at% or more greater than the content of Si measured in the second region P2 or the third region P3. have.

According to the result of the surface analysis of the resin measured in the embodiment, the content of Si measured on the surface of the barrier rib portion before etching may be less than 2.0at%. For example, according to the result of surface analysis of the resin measured in Examples, the content of Si measured on the surface of the barrier rib portion before etching may be 1.5 at% or less.

For example, according to the result of surface analysis of the resin in the embodiment, the content of Si measured on the surface of the barrier rib portion before etching may be 1.3at% to 1.4at%. For example, in the embodiment, according to the result of surface analysis of the resin, the content of Si measured on the surface of the barrier rib portion before etching may be 1.38 at% to 1.40 at%.

In an embodiment, Si measured by XPS in the first region may be 2 at% or less. For example, in the embodiment, Si measured by XPS in the first region may be 1.5 at% or less. For example, in the embodiment, Si measured by XPS in the first region may be 1 at% or less.

In the embodiment, it can be seen that the Si content in the first region P1 is at a level similar to that of the second region P2 and the third region P3. Also, in the embodiment, it can be seen that the content of F in the first region P1 is at a level similar to that of the second region P2 and the third region P3. In detail, it can be seen that in the embodiment, the content of the additive is similar regardless of the depth of the partition wall portion.

In the embodiment, the content of Si and F may be constant in a region up to 30 μm in the depth direction from the upper surface of the barrier rib portion. In the embodiment, the content of Si and F may be constant in a region up to 90 μm in the depth direction from the upper surface of the barrier rib portion. That is, in the embodiment, it can be seen that there is little movement of the additive between the interface between the adhesive layer and the partition wall portion.

In an embodiment, the content of Si and F measured in the first region may be 1at% to 3at%. For example, in the embodiment, the content of Si and F measured in the first region may be 1at% to 2at%. For example, in the embodiment, the content of Si and F measured in the first region may be 2at% to 2.6at%.

In detail, in the embodiment, it can be seen that the deviation between the Si content in the first region P1 and the Si content in the second region P2 is less than 1.5 at%. For example, in the embodiment, it can be seen that the deviation between the Si content in the first region P1 and the Si content in the second region P2 is less than 1.0 at%. For example, in the embodiment, it can be seen that the deviation between the Si content in the first region P1 and the Si content in the second region P2 is less than 0.5 at%.

In detail, in the embodiment, it can be seen that the deviation between the Si content in the first region P1 and the Si content in the third region P3 is less than 1.5 at%. For example, in the embodiment, it can be seen that the deviation of the Si content in the first region P1 and the Si content in the third region P3 is less than 1.0 at%. For example, in the embodiment, it can be seen that the deviation between the Si content in the first region P1 and the Si content in the third region P3 is less than 0.5 at%.

The results of the Si and F contents according to the depth of the partition wall portion of the embodiment are as shown in Tables 1 and 2.

Table 1 shows the results when the barrier rib portion is etched for 60 seconds. In this case, when the barrier rib portion is etched for 60 seconds, the content of additives such as Si and F located in the first region can be checked.

In Table 1, it can be seen that the sum of the contents of Si and F in the first region when etching for 60 seconds is 2.53 at%.

ingredient at% Si2p 0.63 P2p 0.33 S2p 0.48 C1s 74.39 In3d 0.11 O1s 22.16 F1s 1.90

Table 2 shows the results when the barrier rib portion is etched for 1202 seconds. In this case, when the barrier rib portion is etched for 1202 seconds, the content of additives such as Si and F located in the third region can be checked.

In Table 2, it can be seen that the sum of the contents of Si and F in the third region when etching for 1202 seconds is 0.63 at%.

ingredient at% C1s 81.27 O1s 17.83 Si2p 0.22 P2p 0.15 F1s 0.41 S2p 0.13

Referring to Tables 1 and 2, it can be seen that the difference in Si content in the first region and the third region is 0.41 at% in the embodiment. Through this, it can be seen that the difference between the Si content in the first region and the second region is also less than 0.5 at%.

In addition, it can be seen that the difference in the F content in the first region and the third region is less than 1.5 at% in the embodiment. In the embodiment, it can be seen that the difference in the F content in the first region and the second region is less than 1.5 at%.

When the crosslinking density is improved, the content of the additive moving to the surface portion of the resin may be reduced.

Referring to FIG. 7 , the adhesive force between the upper surface of the partition wall and the adhesive layer will be described in detail.

7 shows the adhesion test results in Examples and Comparative Examples.

In the example, a sample specimen having the same structure as in FIG. 5 was prepared for the adhesion test. A 180 degree peel test was performed in which the second substrate 120, which is the upper ITO substrate, was lifted from the sample specimen. The 180 degree peel test is a measure of how much force is applied to peel off the upper ITO substrate.

When the upper ITO substrate is lifted in the 180 degree peel test, the falling interface is either the interface between the adhesive layer 420 and the second electrode 220 or the interface between the adhesive layer 420 and the partition wall 310 can In detail, when the upper ITO substrate is lifted in the 180 degree peel test, the interface with the lower adhesive strength of the first interface between the adhesive layer and the ITO electrode on the adhesive layer or the second interface between the adhesive layer and the resin under the adhesive layer will be peeled off can

In Comparative Examples and Examples, the peeling test of the upper ITO substrate was performed twice, respectively.

First, a 180 degree peel test was performed in which the upper ITO substrate was lifted at room temperature after the preparation of the sample substrates according to Comparative Examples and Examples. Here, after the sample substrate is manufactured, it may mean immediately after bonding the resin layer, which is a light conversion part, and the upper ITO substrate, which are located on the lower ITO substrate, by the adhesive layer 420 . Here, the peel test measurement value immediately after the sample substrate is manufactured may be a value measured within 30 minutes from the preparation of the sample substrate. At this time, the standard of the value at which the upper ITO substrate is peeled off, measured at room temperature immediately after the sample substrate is manufactured, may mean that the adhesion between the OCA adhesive layer and the ITO (50 μm) is about 100 gf/25 mm.

In Comparative Example, the barrier rib may be made of a photo-curable resin using a polymer having a low crosslinking density. Accordingly, in the comparative example, it is seen that the first interface between the adhesive layer 420 and the second electrode 220 is peeled off (109.6 gf/25 mm) immediately after the preparation of the sample substrate, so that the adhesive layer 420 and the light It can be seen that the adhesive force of the second interface between the conversion part 300 is higher, and it can be estimated that the adhesive force between the adhesive layer 420 and the light conversion part 300 has a value of more than 109.6 gf/25 mm. have.

In the embodiment, the barrier rib may be manufactured using a photo-curable resin using a polymer having a high crosslinking density. Accordingly, the embodiment shows that the first interface between the adhesive layer 420 and the second electrode 220 is peeled off (197.2 gf/25 mm) immediately after the sample substrate is fabricated, so that the adhesive layer 420 and the light It can be seen that the adhesive force of the second interface between the conversion unit 300 is higher, and it can be estimated that the adhesive force between the adhesive layer 420 and the light conversion unit 300 has a value greater than 197.2 gf/25 mm. have.

In an embodiment, the adhesive force of the first interface measured at room temperature immediately after bonding of the second electrode and the light conversion unit by the adhesive layer may be 120 gf/25 mm or more. For example, in the embodiment, the adhesive force of the first interface measured at room temperature immediately after bonding of the second electrode and the light conversion unit by the adhesive layer may be 150 gf/25 mm or more. For example, in the embodiment, the adhesive force of the first interface measured at room temperature immediately after bonding of the second electrode and the light conversion unit by the adhesive layer may be 190 gf/25 mm or more. That is, the Example includes a polymer having a high crosslinking density, and unlike the Comparative Example, the adhesive force at the first interface may be 120 gf/25 mm or more.

In addition, in the embodiment, the adhesive force of the second interface measured at room temperature immediately after bonding of the second electrode and the light conversion unit by the adhesive layer may be 120 gf/25 mm or more. For example, in the embodiment, the adhesive force of the second interface measured at room temperature immediately after bonding of the second electrode and the light conversion unit by the adhesive layer may be 150 gf/25 mm or more. For example, in the embodiment, the adhesive force of the second interface measured at room temperature immediately after bonding of the second electrode and the light conversion unit by the adhesive layer may be 190 gf/25 mm or more.

Next, a 180 degree peeling test was performed to prepare a sample substrate according to Comparative Examples and Examples and lift the upper ITO substrate at 60° C. after 24 hours. Here, when the sample substrate is at a temperature of 60° C. higher than room temperature, the adhesive force of the first interface between the adhesive layer and the second electrode may be increased. Therefore, the peeling test was performed after aging at a condition of 60°C.

In a comparative example, a 180 degree peel test was performed in which the sample substrate was manufactured and the upper ITO substrate was lifted after 24 hours at 60ºC. At this time, in the sample substrate of the comparative example, the adhesive layer 402 and the second electrode 220 were observed that the second interface between the adhesive layer 420 and the light conversion part 300 was peeled off (6.4 gf/25 mm). It can be seen that the adhesion of the first interface between them is higher. In addition, in the comparative example, the adhesive force of the second interface between the adhesive layer 420 and the light conversion unit 300 measured immediately after the sample substrate was manufactured was greater than 109.6 gf/25 mm, but the light conversion unit for 24 hours at 60 ° C. It can be seen that the adhesive strength of the second interface between the adhesive layer 420 and the light conversion part 300 is greatly reduced to 6.4 gf/25 mm due to the additive that has risen on the surface of (resin).

In an embodiment, a 180 degree peel test was performed in which the sample substrate was manufactured and the upper ITO substrate was lifted after 24 hours at 60ºC. At this time, in the sample substrate of the embodiment, the second interface between the adhesive layer 420 and the light conversion part 300 is peeled (483 gf/25 mm), between the adhesive layer 402 and the second electrode 220 . It can be seen that the adhesion of the first interface of

In addition, in the embodiment, the adhesive force of the second interface between the adhesive layer 420 and the light conversion unit 300 measured immediately after the sample substrate was manufactured was greater than 197.2 gf/25 mm, and the light conversion unit for 24 hours at 60 ° C. Since the amount of the additive migrating over the surface of the (resin) decreases, the adhesive force of the second interface between the adhesive layer 420 and the light conversion part 300 is 483 gf/25 mm, which is higher than immediately after the sample substrate is fabricated. It can be confirmed that this increased, or that the existing adhesive strength is maintained.

In an embodiment, the adhesive strength of the second interface measured after 24 hours at 60° C. after adhesion of the second electrode and the light conversion unit to the second electrode by the adhesive layer may be 300 gf/25 mm or more. For example, in the embodiment, the adhesive force of the second interface measured after 24 hours at 60° C. after adhesion of the second electrode and the light conversion part by the adhesive layer may be 300 gf/25 mm or more.

In an embodiment, the adhesive force of the second interface measured after 24 hours at 60° C. after adhesion of the second electrode and the light conversion unit to the second electrode by the adhesive layer may be 400 gf/25 mm or more.

For example, in the embodiment, the adhesive force of the second interface measured after 24 hours at 60° C. after adhesion of the second electrode and the light conversion unit by the adhesive layer may be 450 gf/25 mm or more. For example, in the embodiment, the adhesive force of the second interface measured after 24 hours at 60° C. after adhesion of the second electrode and the light conversion part by the adhesive layer may be 480 gf/25 mm or more.

That is, in the embodiment, it is possible to prevent the movement of the additive according to the passage of time after bonding, thereby preventing a decrease in the adhesive force between the partition wall portion and the adhesive layer.

Through the 180 degree peel test, it can be seen that the adhesive strength between the light conversion part and the adhesive layer is improved in the embodiment. That is, it can be seen that in the embodiment, the movement of the additive included in the light conversion unit is reduced, so that the adhesive force of the second interface located between the light conversion unit which is a resin material and the adhesive layer is excellent. Accordingly, the reliability of the optical path switching member according to the embodiment may be improved.

Details of the light conversion unit 300 will be described in detail below.

5 and 8 to 11 , the light conversion unit 300 may include a partition wall unit 310 and a receiving unit 320 .

The partition wall part 310 may be defined as a partition wall area dividing the accommodation part. That is, the barrier rib portion 310 may transmit light as a barrier rib region 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 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. 8 to 11 , light is emitted from the first substrate 110 by a light source disposed under the first substrate 110 and the light is incident in the direction of the second substrate 120 . In this case, the barrier rib part 310 may transmit the light, and the transmitted light may move in the direction of the second substrate 120 .

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. 8 , 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. 9 , 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.

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

8 and 9 , 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 FIG. 5 .

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 FIGS. 10 and 11 , in the light path control member according to the embodiment, the receiving part 320 may be disposed while having a constant inclination angle θ, unlike FIGS. 8 and 9 .

Specifically, referring to FIGS. 10 and 11 , the receiving 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.

Hereinafter, a method of manufacturing the light path control member according to the embodiment will be described with reference to FIGS. 12 to 18 .

Referring to FIG. 12 , an electrode material for forming the first substrate 110 and the first electrode is prepared. Subsequently, the first electrode may be formed by coating or depositing the electrode material on one surface of the first substrate. In detail, the electrode material may be formed on the entire surface of the first substrate 110 . Accordingly, the first electrode 210 formed as a surface electrode may be formed on the first substrate 110 .

Then, referring to FIG. 13 , 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- and an alkyl group having good adhesion to the electrode and a hydrophilic group such as -NH, -OH, -COOH, etc., having good adhesion to the resin layer 410 It may contain organic matter.

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

In detail, the size of the third length extending in the first direction of the resin layer 350 may be less than the size of the first length extending in the first direction of the first substrate 110 , The size of the third width extending in the second direction may be less than or equal to the size of the first width extending in the second direction of the first substrate 110 .

That is, the length of the resin layer 350 may be smaller than the length of the first substrate 110 , and the width of the resin layer 350 may be equal to or smaller than the width of the first substrate 110 .

Next, referring to FIG. 14 , 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 .

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

Next, referring to FIG. 15 , electrode materials for forming the second substrate 120 and the second electrode are prepared. Subsequently, the second electrode may be formed by coating or depositing the electrode material on one surface of the second substrate.

In detail, the electrode material may be formed on the entire surface of the second substrate 120 . Accordingly, the second electrode 220 formed as a surface electrode may be formed on the second substrate 120 .

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

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

Subsequently, referring to FIG. 16 , an adhesive layer 420 may be formed by coating an adhesive material on the second electrode 220 . In detail, a light-transmitting adhesive layer capable of transmitting light may be formed on the second electrode 220 . For example, the adhesive layer 420 may include an optically transparent adhesive layer (OCA).

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

In detail, the size of the fourth length extending in the first direction of the adhesive layer 420 is greater than the size of the third length extending in the first direction of the light conversion part 300 , and the size of the third length extending in the first direction of the adhesive layer 420 is larger than the size of the second length of the adhesive layer 420 . The size of the fourth width extending to , may be smaller than the size of the third width extending in the second direction of the light conversion unit 300 .

Then, referring to FIG. 17 , the first substrate 110 and the second substrate 120 may be adhered. In detail, the second substrate 120 is disposed on the light conversion unit 300 , and the second substrate 120 and the second substrate 120 and the adhesive layer 420 are disposed under the second substrate 120 through the adhesive layer 420 . The light conversion unit 300 may be adhered.

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

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

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

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

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

Then, referring to FIG. 18 , one light path control member may be manufactured by cutting the light conversion unit 300 . In detail, the light conversion unit 300 may be cut in the longitudinal direction of the light conversion unit 300 .

That is, along the dotted line shown in FIG. 22 , the light conversion unit 300 and the buffer layer 410 under the light conversion unit 300 , the first electrode 210 , and the first substrate 110 may be cut. . A plurality of light path controlling members A and B may be formed by the cutting process, and FIG. 23 is a view showing one of the plurality of light path controlling members.

In detail, the light conversion unit 300 may be cut so that side surfaces of the first substrate 110 , the second substrate 120 , and the light conversion unit 300 in the width direction may be disposed on the same plane. have.

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

In other words. Both ends of the adhesive layer 420 in the second direction and both ends of the light conversion unit 300 in the second direction may be connected to each other.

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

Subsequently, the buffer layer 410 and/or the adhesive layer 420 disposed on the upper portion of the first substrate 110 and the lower portion of the second substrate 120 may be partially removed to form a connection portion in which the electrode is exposed. .

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

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

Hereinafter, 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. 19 to 22 .

Referring to FIG. 19 , 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 .

20 and 21 , the light path control member according to the embodiment may be applied to a vehicle.

20 and 21 , 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. 20 , 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. 21 . 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. 22 , 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.

First substrate: 110
First electrode: 210
Second substrate: 120
Second electrode: 220
Adhesive layer: 420
Bottom of adhesive layer: 420B
Bulkhead: 310
Upper surface of bulkhead: 310T
Receptacle: 320
Dispersion: 320a
Light Conversion Particles: 320b

Claims (10)

a first substrate 110;
a first electrode 210 disposed on the first substrate;
a light conversion unit 300 disposed on the first electrode;
a second substrate 120 disposed on the first substrate;
a second electrode 220 disposed under the second substrate; and
and an adhesive layer 420 disposed between the light conversion unit and the second electrode,
The light conversion unit includes a partition wall unit 310 and a receiving unit 320 which are alternately arranged,
The accommodating part is changed in light transmittance according to the application of voltage,
The adhesive layer includes a first interface between the upper surface of the adhesive layer and the second electrode and a second interface between the lower surface 420B of the adhesive layer and the light conversion unit,
The partition wall portion,
a first region from the upper surface of the partition wall to 30 μm in the direction of the first substrate;
a third region up to 30 μm from the lower surface of the barrier rib in the direction of the second substrate; and
a second region between the first region and the third region;
and Si measured by XPS in the first region is 2 at% or less. The method of claim 1,
The first interface and the second interface have different adhesive strengths,
The adhesive force of the second interface measured after 24 hours at 60° C. after adhesion of the second electrode and the light conversion part by the adhesive layer is 300 gf/25 mm or more. The method of claim 1,
An optical path controlling member, an optical path controlling member, wherein a difference between the Si content measured by XPS in the first region and the Si content measured by XPS in the third region is 1 at% or less. The method of claim 1,
and a difference between the content of Si measured by XPS in the first region and the content of Si measured by XPS in the second region is 1 at% or less. The method of claim 1,
The light conversion part is formed of a photo-curable resin,
The light-curable resin includes an oligomer, a monomer, a photopolymerization initiator, and an additive. 6. The method of claim 5,
wherein the photo-curable resin has a swelling ratio of 10% or less. 6. The method of claim 5,
and the oligomer is urethane acrylate. 6. The method of claim 5,
The monomer is an optical path control member, including the number of branches is 5 or more. 6. The method of claim 5,
When the amount of the photo-curable resin is 100 wt%, the additive is included in an amount of 0.5 wt% or less. display panel; and
a light path control member disposed on the display panel;
The light path control member,
a first substrate;
a first electrode disposed on the first substrate;
a light conversion unit disposed on the first electrode;
a second substrate disposed on the first substrate;
a second electrode disposed under the second substrate; and
An adhesive layer disposed between the light conversion unit and the second electrode,
The light conversion part includes a partition wall part and a receiving part which are alternately arranged,
The accommodating part is changed in light transmittance according to the application of voltage,
The adhesive layer includes a first interface between the upper surface of the adhesive layer and the second electrode and a second interface between the lower surface of the adhesive layer and the light conversion part,
The partition wall portion,
a first region from the upper surface of the partition wall to 30 μm in the direction of the first substrate;
a third region up to 30 μm from the lower surface of the barrier rib in the direction of the second substrate; and
a second region between the first region and the third region;
The display device of claim 1, wherein Si measured by XPS in the first region is 2 at% or less.

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