KR20210089876A - Light route control member and display having the same - Google Patents

Abstract

A light route control member according to the embodiment includes a first substrate, a first electrode disposed on the upper surface of the first substrate; a second substrate disposed on the first substrate; a second electrode disposed on the lower surface of the second substrate; a light conversion part disposed between the first and second electrodes, and an adhesive layer disposed between the second electrode and the light conversion part. The light conversion part includes a barrier rib part and a receiving part that are alternately arranged. The receiving part includes a dispersion solution and a plurality of light absorbing particles disposed in the dispersion solution. The log volume resistance of the adhesive layer is 9 Ω·cm to 13 Ω·cm. An object of the present invention is to provide a light route control member having improved luminance and response speed.

Description

Light path control member, and a display device including the same {LIGHT ROUTE CONTROL MEMBER AND DISPLAY HAVING THE SAME}

The embodiment relates to a light path control member having improved dispersion and shielding properties, 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.

On the other hand, there are various factors controlling the characteristics of the switchable light blocking film having such an on-off function. For example, the light absorption rate and movement speed of the electrophoretic particles included in the light blocking pattern are also related to the characteristics of the light blocking film.

That is, the driving characteristics of the switchable light-shielding film are changed according to the dispersion stability of the electrophoretic particles and the movement speed of the electrophoretic particles, and the thickness of the switchable light-shielding film can be controlled according to the light absorptivity of the electrophoretic particles.

In addition, in the light blocking film having the on-off function, an adhesive layer may be disposed between the upper and lower substrates. The adhesive layer is a configuration for bonding the upper substrate or the lower substrate, and there is a problem in that light blocking ability is lowered according to the characteristics of the adhesive layer.

For example, a sufficient electric field may not be formed in the light blocking film according to electrical characteristics of the adhesive layer. In detail, when the adhesive layer is too thick or the resistance is high, an electric field for controlling the movement of the electrophoretic particles may not be sufficiently formed. In this case, even when a voltage is applied to the light-shielding film, the movement speed of the electrophoretic particles may be significantly reduced, and accordingly, there is a problem in that it is difficult for the user to effectively control the on and off of the light-shielding function.

Accordingly, there is a need for a new optical path control member that solves the above problems and has an improved moving speed and light absorption rate.

An embodiment is to provide an optical path control member having improved luminance and response speed.

In addition, the embodiment is to provide an optical path control member capable of forming a sufficient electric field for the movement of electrophoretic particles.

In addition, the embodiment is to provide an optical path control member to which the upper and lower substrates can be effectively adhered.

The light path control member according to the embodiment includes a first substrate, a first electrode disposed on an upper surface of the first substrate, a second substrate disposed on the first substrate, and a lower surface of the second substrate. a second electrode disposed, a light conversion unit disposed between the first and second electrodes, and an adhesive layer disposed between the second electrode and the light conversion unit, wherein the light conversion unit includes barrier ribs disposed alternately; and a receptacle, wherein the receptacle comprises a dispersion and a plurality of light absorbing particles disposed in the dispersion, and a Log Volume Resistivity of the adhesive layer is 9 Ω·cm to 13 Ω·cm.

In addition, the display apparatus according to the embodiment includes a display panel and a light path control member, wherein the light path control member includes a first substrate, a first electrode disposed on an upper surface of the first substrate, and a portion of the first substrate. A second substrate disposed on an upper portion, a second electrode disposed on a lower surface of the second substrate, a light conversion unit disposed between the first and second electrodes, and disposed between the second electrode and the light conversion unit a plurality of light absorbing particles disposed in the dispersion and the dispersion, wherein the light conversion part comprises a partition wall part and a receiving part which are alternately arranged, and the log volume resistance of the adhesive layer is 9 Ω ·cm to 13 Ω·cm.

The light path control member according to the embodiment may include a light transmitting unit and a light blocking unit having a light transmittance varying according to an applied voltage. Accordingly, the light path control member may be applied in various ways according to a user's usage environment.

In addition, the light path control member according to the embodiment may be provided in a form capable of increasing the amount of light transmitted in the direction of the viewer's viewing surface. Accordingly, the light path control member may have improved front luminance and improved visibility.

In addition, in the light path control member according to the embodiment, since the light absorbing particles disposed in the accommodating part move from a wide area to a narrow area when a voltage is applied, they can be easily moved. Accordingly, the light path control member may have improved electrical and optical efficiency.

Also, the light path control member according to the embodiment may include an adhesive layer in which a monomer and a polymer are mixed, and the adhesive layer includes at least one additive selected from an antistatic agent, a surfactant, and a conductive polymer. Accordingly, the adhesive layer can be manufactured to have a set log volume resistance, thereby forming a sufficient electric field for controlling the light conversion unit.

In addition, since the adhesive layer can be manufactured to a set thickness, the upper and lower substrates can be easily adhered through the adhesive layer, and the light conversion part in which the light absorbing particles are accommodated can be effectively covered.

1 is a diagram illustrating a perspective view of a light path control member according to an embodiment.
2 and 3 are perspective views illustrating a first substrate, a first electrode, and a second substrate and a second electrode of the light path controlling member according to the embodiment.
4 to 11 are views illustrating various cross-sectional views of a light path control member according to an embodiment.
12 to 19 are views for explaining a method of manufacturing a light path control member according to an embodiment.
20 is a cross-sectional view of a display device to which a light path control member according to an exemplary embodiment is applied.
21 and 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 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 electrophoretic particle and a light path control member including the same 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 the movement of electrophoretic particles by application of a voltage.

1 is a diagram illustrating a perspective view of a light path control member according to an embodiment, and FIGS. 2 and 3 are a first substrate, a first electrode, and a second substrate and a second electrode of the light path control member according to the embodiment. Figures showing a perspective view.

1 to 3 , the light path control member 1000 according to the embodiment includes a first substrate 110 , a second substrate 120 , a first electrode 210 , a second electrode 220 , and a light source. It may include a converter 300 and an adhesive layer 400 .

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 have a thickness of about 1 mm or less.

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

The first electrode 210 may be disposed on the first substrate 110 in a film shape. In addition, the light transmittance of the first electrode 210 may be about 80% or more.

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.

Alternatively, the first electrode 210 may include a plurality of conductive patterns. For example, 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 have a thickness of about 1 mm or less.

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 facing the first substrate 110 . 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 a transparent conductive material. For example, the second electrode 220 may include indium tin oxide, indium zinc oxide, copper oxide, tin oxide, or zinc oxide. , and may include a metal oxide such as titanium oxide.

The second electrode 220 may be disposed on the first substrate 110 in a film shape. In addition, the light transmittance of the second electrode 220 may be about 80% or more.

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 first electrode 120 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.

Alternatively, the second electrode 220 may include a plurality of conductive patterns. For example, 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 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 . The light conversion unit 300 will be described in more detail with reference to drawings to be described later.

4 to 11 are views illustrating various cross-sectional views of a light path control member according to an embodiment. The light conversion unit according to the embodiment will be described in more detail with reference to FIGS. 4 to 11 .

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

The barrier rib part 310 may be defined as a barrier rib region dividing the plurality of accommodating parts 320 , and the accommodating part 320 is defined as a region that changes into a light blocking part and a light transmitting part according to the application of voltage. can be

The partition wall part 310 may include a transparent material. The barrier rib part 310 may include a material capable of transmitting light. For example, the partition wall part 310 may include a resin material. 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. 4 to 11 , light may be emitted from a lower portion of the first substrate 110 to an upper direction to be incident on the first substrate 110 . The incident light may pass through the barrier rib part 310 and move toward the second substrate 120 .

The partition wall part 310 and the accommodating part 320 may be alternately disposed with each other. In detail, the partition wall part 310 and the accommodating part 320 may be alternately disposed with each other. That is, each of the partition wall portions 310 may be disposed between the accommodating portions 320 adjacent to each other, and each accommodating portion 320 may be disposed between the adjacent partition wall portions 310 . The 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 disposed in contact with at least one of the first electrode 210 and the second electrode 220 .

For example, as shown in FIGS. 4 to 7 , the partition wall part 310 and the accommodating part 320 may directly contact the first electrode 210 and indirectly contact the second electrode 220 . and can be placed.

Also, as shown in FIGS. 8 and 9 , the partition wall part 310 may be disposed in direct contact with the first electrode 210 and indirectly in contact with the second electrode 220 . In addition, the accommodating part 320 may be disposed to be spaced apart from the first electrode 210 and indirectly contact the second electrode 220 .

Also, as shown in FIGS. 10 and 11 , the partition wall part 310 may be disposed in direct contact with the first electrode 210 and indirectly contacting the second electrode 220 . In addition, the accommodating part 320 may be in direct contact with the first electrode 210 and may be spaced apart from the second electrode 220 .

The accommodating part 320 may include a dispersion 320a and light absorbing particles 320b. In detail, the dispersion liquid 320a may be filled in the accommodating part 320 , and a plurality of light absorbing particles 320b may be dispersed in the dispersion liquid 320a.

The dispersion liquid 320a may be a material for dispersing the light absorbing 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 absorbing particles 320b may be dispersed in the dispersion 320a. In detail, the plurality of light absorbing particles 320b may be disposed to be spaced apart from each other in the dispersion 320a.

The light absorbing particle 320b may be a particle having an electric charge on its surface. Accordingly, the light absorbing particles 320b may move in the dispersion liquid 320a when a voltage is applied to the light path control member 1000 .

The light absorbing particles 320b may include a material having a color. The light absorbing particles 320b may include a material that absorbs light. In detail, the light absorbing particles 320b may include a black light absorbing material. For example, the light absorbing particles 320b may include carbon black particles.

The light transmittance of the receiving part 320 may be changed by the light absorbing 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 absorbing particles 320b.

For example, in the light path control member 1000 according to the embodiment, the transmittance is changed in the second mode or the second mode according to the voltage applied to the first electrode 210 and the second electrode 220 . It can be changed from the second mode to the first mode.

In detail, in the light path control member 1000 according to the embodiment, in the first mode, the accommodating part 320 may become a light blocking part, and light at a specific angle may be blocked by the accommodating part 320 . That is, the viewing angle of the user viewing from the outside may be narrowed.

In addition, in the light path control member 1000 according to the embodiment, in the second mode, the receiving part 320 becomes a light transmitting part, and in the optical path controlling member 1000 according to the embodiment, the partition wall part 310 and the All of the light may be transmitted through the accommodating part 320 . That is, the viewing angle of the user viewing from the outside may be widened.

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, may be implemented by the movement of the light absorbing particles 320b of the accommodating part 320 . can That is, the light absorbing particle 320b has a charge on its surface, and may move in the direction of the first electrode 210 or the second electrode 220 by an applied voltage. That is, the light absorbing particles 320b may be electrophoretic particles.

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 1000 from the outside, the light absorbing particles 320b of the accommodating part 320 are uniformly dispersed in the dispersion 320a, and accordingly, the accommodating part 320 At 320, light may be blocked by the light absorbing 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 1000 from the outside, the light absorbing particles 320b may move. For example, the light absorbing particle 320b may be moved toward one end or the other end of the receiving part 320 by a voltage transmitted through the first electrode 210 and the second electrode 220 . can That is, the light absorbing particles 320b may move in the direction of the first electrode 210 or the second electrode 220 .

In detail, when a voltage is applied to the first electrode 210 and/or the second electrode 220, an electric field is formed between the first electrode 210 and the second electrode 220, The light-absorbing particles 320b in a charged state may move toward the (+) electrode of the first electrode 210 and the second electrode 220 using the dispersion 320a as a medium.

That is, when no voltage is applied to the first electrode 210 and/or the second electrode 220, as shown in FIGS. 5, 7, 9 and 11, the light absorbing particles 320b are It is uniformly dispersed in the dispersion liquid 320a so that the receiving part 320 may be driven as a light blocking part.

In addition, when a voltage is applied to the first electrode 210 and/or the second electrode 220 , as shown in FIGS. 4, 6, 8 and 10 , the light absorbing particle 320b is the The dispersion liquid 320a may move in the direction of the first electrode 210 , that is, the light absorbing particles 320b may move in one direction, and the receiving part 320 may be driven as a light transmitting part.

Accordingly, the light path control member 1000 according to the embodiment may be driven in two modes according to the user's surrounding environment. That is, when the user wants to transmit light only at a specific viewing angle, the receiving unit is driven as a light blocking unit, or in an environment where the user requires a wide viewing angle and high luminance, a voltage is applied to drive the receiving unit as a light transmitting unit. can

Accordingly, since the light path control member 1000 according to the embodiment can be implemented in two modes according to the user's request, the light path control member 1000 can be applied regardless of the user's environment.

The receiving part 320 of the light converting part 300 may be formed in various shapes.

First, referring to FIGS. 4 and 5 , the accommodating part 320 extends from one end of the partition 310 to the other end, and the width of the accommodating part 320 may be changed. For example, the accommodating part 320 may have a trapezoidal cross-section. In detail, the accommodating part 320 may extend from the first electrode 210 to the second electrode 220 and may be formed to widen the width of the accommodating part 320 .

That is, the width of the accommodating part 320 may be widened while extending from the light incident part to which the light is incident to the light output part from which the light is emitted. The width of the accommodating part 320 may be narrowed while extending in the opposite direction from the user's viewing surface.

Accordingly, when a voltage is applied to the light conversion unit 300 , the light absorbing particles 320b of the receiving unit 320 may move in a direction in which the width of the receiving unit 320 becomes narrower. Accordingly, since the light absorbing particles 320b move in a direction opposite to the viewing surface rather than the viewing surface, blocking of light emitted in the viewing surface direction can be prevented, thereby increasing the luminance of the light path control member 1000 . can be improved

In addition, since the light absorbing particles 320b move from a wide area to a narrow area, the light absorbing particles 320b may be easily moved.

In addition, since the light absorbing particles 320b move to a narrow area of the accommodating part, the amount of light transmitted in the direction of the user's viewing surface may be increased, thereby improving the front luminance.

In detail, the accommodating part 320 includes a first width defined as a width of a lower region adjacent to the first electrode 210 and a second width defined as a width of an upper region adjacent to the second electrode 220 . can do. In addition, the partition wall part 310 may include a third width defined as a width of a lower region adjacent to the first electrode 210 . Here, the first width may mean the shortest width of the accommodating part 320 and the second width may mean the longest width of the accommodating part 320 . The third width may mean the longest width of the partition wall portion 310 .

Also, the accommodating part 320 may include a first height defined as a vertical height of the accommodating part 320 . In this case, when the height of the accommodating part 320 is the same as the height of the partition wall part 310 , the first height may be defined as the height of the partition wall part 310 .

As described above, the first width may be smaller than the second width. In detail, a ratio of the second width to the first width may be about 1.8 or less. When the ratio of the second width to the first width exceeds about 1.8, light blocking efficiency in the first mode may decrease, and light transmission efficiency in the second mode may decrease.

In detail, when the ratio of the second width to the first width exceeds 1.8, the inclination angle of the accommodating part 320 is increased, so that light at an unwanted angle in the first mode may be blocked, and the In the second mode, an amount of light transmission may be reduced by an increase in the inclination angle, and thus front luminance may be reduced.

Also, a ratio of the third width to the first width may be about 1.5 or more. When the ratio of the third width to the first width is less than about 1.5, the light blocking efficiency in the first mode and the light transmission efficiency in the second mode may decrease.

In detail, when the ratio of the third width to the first width is less than 1.5, the light transmission amount in the second mode may be reduced due to the reduction of the area through which the light is transmitted, and the front luminance may be reduced.

In addition, a ratio of the first height of the partition wall part 310 or the accommodating part 320 to the first width may be about 4 or more. When the ratio of the first height of the barrier rib part 310 or the accommodating part 320 to the first width is less than 4, the light blocking efficiency in the first mode and the light transmission efficiency in the second mode are lowered. can be

In detail, when the ratio of the first height of the partition wall part 310 or the accommodating part 320 to the first width is less than about 4, the angle not desired in the first mode by the height of the accommodating part 320 is of light may be blocked, and the amount of light transmission may be reduced by an increase in the blocking area in the second mode, and thus the front luminance may be reduced.

In addition, referring to FIGS. 6 and 7 , the receiving part 320 may extend from one end of the partition wall part 310 to the other end and may have a constant width. For example, the accommodating part 320 may be formed in a parallelogram shape in cross section. In detail, the receiving part 320 may extend from the first electrode 210 to the second electrode 220 and may be formed to have a constant width.

In addition, the accommodating part 320 may have an inclination angle θ. In detail, the side surface of the accommodating part 320 , which is the inner surface of the partition wall part 310 , may have an inclination angle θ of greater than 0 degrees to less than 90 degrees with respect to the upper surface of the first electrode 210 .

Accordingly, when the light path control member 1000 is used together with the display panel, it is possible to prevent a moire phenomenon due to the overlapping of the pattern of the display panel and the receiving part 320 of the light path control member 1000 . Thus, the visibility of the user can be improved.

In detail, the display panel may include pixel patterns extending in one direction. Accordingly, the pixel pattern and the pattern of the receiving unit 320 of the light path control member 1000 overlap to prevent the moire phenomenon, but by tilting the pattern of the receiving unit 320 at a predetermined angle and disposing, Such a moire phenomenon can be prevented.

That is, the pattern of the accommodating part 320 and the pixel pattern may be disposed to cross each other, and in this case, the pattern of the accommodating part 320 and the pixel pattern intersect at an angle of greater than 0° to less than 90°, can be placed.

Also, referring to FIGS. 8 and 9 , the accommodating part 320 extends from one end to the other end of the partition wall 310 and may change in width. For example, the accommodating part 320 may have a trapezoidal cross-section. In detail, the accommodating part 320 may extend from the second electrode 220 to the first electrode 210 and may be formed such that the width of the accommodating part 320 is gradually narrowed.

That is, the width of the accommodating part 320 may be widened while extending from the light incident part to which the light is incident to the light output part from which the light is emitted. The width of the accommodating part 320 may be narrowed while extending in the opposite direction from the user's viewing surface.

Also, the receiving part 320 may be spaced apart from the first electrode 210 or the second electrode 220 . For example, the receiving part 320 may be spaced apart from the first electrode 210 and indirectly contact the second electrode 220 .

In detail, the receiving part 320 may be disposed to be spaced apart from the electrode in the direction opposite to the viewing plane. That is, the electrode (first electrode 210) in the direction opposite to the viewing plane may not be in contact with the receiving part 320, and the electrode (second electrode 220) in the viewing plane direction may not be in contact with the receiving part ( 320) directly or indirectly.

The same or similar material to the partition wall 310 may be disposed in a region where the receiving part 320 and the first electrode 210 are spaced apart from each other.

Accordingly, when a voltage is applied to the light conversion unit 300 , the light absorbing particles 320b of the receiving unit 320 may move in a direction in which the width of the receiving unit 320 becomes narrower. Accordingly, the transmittance of the light emitted in the direction of the viewing plane may be increased, and the luminance of the light path control member 1000 may be improved, thereby improving visibility.

Also, referring to FIGS. 10 and 11 , the accommodating part 320 may extend from one end to the other end of the partition wall 310 and may have a variable width. For example, the accommodating part 320 may have a trapezoidal cross-section. In detail, the accommodating part 320 may extend from the first electrode 210 to the second electrode 220 and may be formed such that the width of the accommodating part 320 is increased in braille.

That is, the width of the accommodating part 320 may be widened while extending from the light incident part to which the light is incident to the light output part from which the light is emitted. The width of the accommodating part 320 may be narrowed while extending in the opposite direction from the user's viewing surface.

Also, the receiving part 320 may be spaced apart from the first electrode 210 or the second electrode 220 . For example, the accommodating part 320 may be spaced apart from the second electrode 220 and indirectly contact the first electrode 210 .

In detail, the receiving part 320 may be disposed to be spaced apart from the electrode in the viewing plane direction. That is, the electrode (second electrode 220) in the viewing plane direction may not come into contact with the accommodating part 320, and the electrode (first electrode 210) in the opposite direction to the viewing plane direction may not be in contact with the accommodating part 320. 320) directly or indirectly.

The same or similar material to the partition wall 310 may be disposed in a region where the receiving part 320 and the second electrode 220 are spaced apart from each other.

Accordingly, when a voltage is applied to the light conversion unit 300 , the light absorbing particles 320b of the receiving unit 320 may move in a direction in which the width of the receiving unit 320 becomes narrower. Accordingly, the transmittance of the light emitted in the direction of the viewing plane may be increased, and the luminance of the light path control member 1000 may be improved, thereby improving visibility.

In addition, although not shown in the drawings, the accommodating part 320 may have a shape opposite to the above-described shape ( FIGS. 4 and 5 ). For example, the accommodating part 320 may extend from the first electrode 210 to the second electrode 220 and may be formed to have a narrow width of the accommodating part 320 . In detail, the first width of the lower region of the accommodating part 320 may be greater than the second width of the upper region.

That is, the width of the accommodating part 320 may be narrowed while extending from the light incident part to which the light is incident to the light output part from which the light is emitted. The width of the receiving portion 320 may be widened while extending from the user's viewing surface to the opposite surface direction.

Accordingly, when a voltage is applied to the light conversion unit 300 , the light absorbing particles 320b of the receiving unit 320 may move in a direction in which the width of the receiving unit 320 is widened. Accordingly, the contact area between the first electrode 210 and one surface of the receiving part 320 on which the light absorbing particles 320b moves is increased, so that the moving speed of the light absorbing particles 320b, that is, the light path control member ( 1000) driving speed, the reaction speed can be improved.

In addition, although not shown in the drawings, the accommodating part 320 has a constant width and may extend from one end of the partition wall 310 to the other end. For example, the accommodating part 320 may have a rectangular cross-section. In detail, the accommodating part 320 may extend in a direction from the first electrode 210 to the second electrode 220 and may be formed to have a constant width. That is, the accommodating part 320 may have the same width in the lower region and the upper region.

Referring back to FIGS. 4 to 11 , an adhesive layer 400 may be disposed on the light conversion unit 300 . The adhesive layer 400 may be disposed between the first substrate 110 and the second substrate 120 . The adhesive layer 400 may be disposed on at least one of between the light conversion unit 300 and the first substrate 110 and between the light conversion unit 300 and the second substrate 120 .

For example, the adhesive layer 400 may be disposed between the light conversion unit 300 and the second substrate 120 as shown in FIGS. 4 to 11 . In detail, the adhesive layer 400 may be disposed between the light conversion unit 300 and the second electrode 220 . The partition wall part 310 and the receiving part 320 may be disposed in indirect contact with the second electrode 220 by the adhesive layer 400 .

The adhesive layer 400 may have a horizontal width corresponding to that of the light conversion unit 300 . For example, the adhesive layer 400 may be provided to have the same horizontal width as that of the light conversion unit 300 to effectively bond the light conversion unit 300 and the second substrate 120 .

The adhesive layer 400 may have a set thickness. For example, the adhesive layer 400 may have a thickness of about 1 μm to about 40 μm. In detail, when the thickness of the adhesive layer 400 is less than about 1 μm, the surface roughness of the substrates respectively disposed on the upper and lower portions of the adhesive layer 400 , for example, the second electrode 220 and the light conversion unit 300 . Adhesive function may be reduced by this. Also, when the thickness of the adhesive layer 400 exceeds about 40 μm, the overall thickness of the light path control member 1000 may increase. As a result, the light transmission characteristic of the light path control member 1000 may be deteriorated. In addition, when the thickness of the adhesive layer 400 exceeds about 40 μm, a sufficient electric field may not be formed in the light conversion unit 300 . Accordingly, the movement speed and reaction speed of the light absorbing particles 320b may be significantly reduced, and thus the performance of the light path control member 1000 may be deteriorated.

Preferably, the thickness of the adhesive layer 400 may be about 15 μm to about 30 μm. In this case, the adhesive layer 400 may have sufficient adhesive properties other than the substrates disposed on the upper and lower portions of the adhesive layer 400 , and sufficient to control the light absorbing particles 320b in the light conversion unit 300 . can form an electric field.

Also, the adhesive layer 400 may have a set log volume resistivity. For example, the log volume resistance of the adhesive layer 400 may be about 9 Ω·cm to about 13 Ω·cm. In detail, when the log volume resistance of the adhesive layer 400 is less than about 9 Ω·cm, it may be difficult to effectively control the light absorbing particles 320b. In addition, when the log volume resistance of the adhesive layer 400 exceeds about 13 Ω·cm, the light absorbing particles 320b may not move to an applied voltage. That is, a sufficient electric field for controlling the light absorbing particles 320b may not be formed in the light conversion unit 300 . Accordingly, the adhesive layer 400 preferably has the aforementioned thickness and the aforementioned log volume resistance in consideration of adhesive force and electric field formation. More preferably, the log volume resistance of the adhesive layer 400 may be about 10 Ω·cm to about 12 Ω·cm in consideration of electric field formation and effective control of the light absorbing particles 320b.

The adhesive layer 400 may include a plurality of materials. The adhesive layer 400 may include a material capable of transmitting light. For example, the adhesive layer 400 may be formed of a material having a light transmittance set so that the light passing through the light conversion unit 300 from the first substrate 110 is emitted in the direction of the second substrate 120 . may include In detail, the adhesive layer 400 may include a material having a light transmittance of about 80% or more. In more detail, the adhesive layer 400 may include a material having a light transmittance of about 85% or more and having excellent haze characteristics.

The adhesive layer 400 may include a resin or silicone material, and a mixture of a monomer and a polymer may be provided. In detail, the adhesive layer 400 may be formed through an adhesive composition in which a monomer and a polymer are mixed.

The adhesive layer 400 may include a monomer having a glass transition temperature (Tg) of less than about 160 degrees (°C). For example, the adhesive layer 400 may include 2-ethylhexyl acrylate (2-Ethylhexyl Acrylate), 2-hydroxyethyl acrylate (2-Hydroxyethyl Acrylate), acrylic acid (Acrylic acid), isobornyl acrylate (Isobornyl Acrylate). ), methyl methacrylate (Methyl methacrylate) and acrylamide (Acrlyamide) may include at least one monomer.

Here, the monomer may be a factor controlling the fluidity of the adhesive composition. In addition, the monomer may be a factor controlling the log volume resistance value of the adhesive layer 400 to be formed. Accordingly, the monomer may be included in an amount of about 5% by weight or less based on the total weight of the adhesive layer 400 . Specifically, the monomer may be included in an amount of about 5% by weight or less based on the total weight of the adhesive composition. In more detail, the monomer may be included in an amount of about 0.1 wt% to about 5 wt% based on the total weight of the adhesive composition.

When the monomer is included in less than about 0.1 wt% based on the total weight of the adhesive composition, the adhesive layer 400 may have an excessively high log volume resistance value. For example, in this case, the log volume resistance of the adhesive layer 400 may exceed about 13 Ω·cm. In addition, when the monomer exceeds about 5% by weight based on the total weight of the adhesive composition, it is difficult to control the thickness of the adhesive layer 400 formed by increasing the fluidity of the adhesive composition, and the log of the adhesive layer 400 produced The volume resistance may be too low. For example, in this case, the log volume resistance of the adhesive layer 400 may be less than about 9 Ω·cm.

The adhesive layer 400 may further include an additive. In detail, the adhesive layer 400 may further include at least one additive selected from an antistatic agent, a surfactant, and a conductive polymer.

The antistatic agent may include an ionic liquid or an ionic salt. For example, the antistatic agent may include an ionic liquid containing a fluorine-based anion and an ionic salt. The antistatic agent may include (nC ₄ H ₉ ) ₃ (CH ₃ )N ⁺ -N(SO ₂ CF ₃ ) ₂ , R ₄ N ⁺ -N(SO ₂ CF ₃ ), and the like. The antistatic agent may control the log volume resistance of the adhesive layer 400 . In detail, the antistatic agent may generate ions in the adhesive layer 400 to reduce the log volume resistance of the adhesive layer 400 .

The surfactant may be an ionic surfactant. For example, the surfactant may include at least one of an anionic surfactant, a cationic surfactant, and an amphoteric surfactant. The surfactant may control the log volume resistance of the adhesive layer 400 . In detail, cations or anions included in the surfactant may reduce the log volume resistance of the adhesive layer 400 .

The conductive polymer is polyaniline (Polyaniline, PANI), polypyrrole, polythiophene (PT), polyacetylene (PA), polyphenylenevinylene (Poly (phenylenevinylene), PPV), polypyrrole or poly It may include at least one of a thiophene derivative and poly(3,4-ethylenedioxythiophene, PEDOT). The conductive polymer may control the log volume resistance of the adhesive layer 400 . In detail, the conductive polymer may reduce the log volume resistance of the adhesive layer 400 by improving the electrical properties of the adhesive layer 400 .

The additive may include at least one selected from an antistatic agent, a surfactant, and a conductive polymer. The additive may be included in an amount of about 10% by weight or less based on the total weight of the adhesive layer 400 . In detail, the additive may be included in an amount of about 10% by weight or less based on the total weight of the adhesive composition. When the amount of the additive included in the adhesive layer 400 exceeds about 10% by weight, adhesive properties and electrical properties of the adhesive layer 400 may be deteriorated.

In addition, when the additive includes an antistatic agent including an ionic salt, the antistatic agent may be included in an amount of about 5% by weight or less based on the total weight of the adhesive composition. In detail, when the antistatic agent including the ionic salt exceeds about 5% by weight, the antistatic agent may not be uniformly mixed in the adhesive composition, thereby reducing the electrical properties of the adhesive layer 400 produced. can Accordingly, the content of the additive may preferably satisfy the above-described range.

The light path control member 1000 may include a sealing part 500 . The sealing part 500 may be disposed on a side surface of the partition wall part 310 . The sealing part 500 may seal the side surface of the light converting part 300 . Also, the sealing part 500 may be disposed on side surfaces of the first substrate 110 and the second substrate 120 to seal the optical path control member 1000 .

The sealing part 500 may prevent oxygen, moisture, foreign substances, etc. from being introduced into the optical path control member 1000 . In detail, the sealing part 500 may prevent oxygen, moisture, foreign substances, etc. from entering the light conversion part 300 .

The sealing part 500 may include at least one of an organic material and an inorganic material. For example, the sealing part 500 may include at least one of epoxy, polyethylene terephthalate (PET), polyimide (PI), polyethylene (PE), polycarbonate (PC), polyacrylate (PA), and the like. of organic matter. In addition, the sealing part 500 may include _{at least one inorganic material selected from among silicon oxide (SiO 2} ), silicon nitride (SiN _x ), aluminum oxide (Al ₂ O ₃ ), titanium oxide (TiO ₂ ), and zinc oxide (ZnO). may include.

12 to 19 are views for explaining a method of manufacturing a light path control member according to an embodiment.

A method of manufacturing the light path controlling member according to the embodiment will be described with reference to FIGS. 12 to 19 .

First, referring to FIG. 12 , electrode materials for forming the first substrate 110 and the first electrode 210 are prepared. Subsequently, the electrode material may be coated or deposited on one surface, for example, an upper surface of the first substrate 110 . In detail, the electrode material may be coated or deposited on the entire area of one 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 may be formed by coating a resin material on the first electrode 210 . In detail, a resin layer may be formed by coating, for example, a UV resin, a photoresist resin, a urethane resin, an acrylic resin, or the like on the first electrode 210 .

Thereafter, a pattern portion may be formed on the resin layer using a mold. For example, a hole or a groove may be formed in the resin layer by an imprinting process using the mold. Accordingly, a plurality of barrier ribs may be formed in the resin layer, and the above-described barrier rib portion 310 and the receiving portion 320 may be formed in the resin layer.

Also, referring to FIG. 14 , an electrode material for forming the second substrate 120 and the second electrode 220 is prepared. Subsequently, the electrode material may be coated or deposited on one surface, for example, an upper surface of the second substrate 120 . In detail, the electrode material may be coated or deposited on the entire area of one 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, referring to FIG. 15 , the adhesive layer 400 may be formed by applying the adhesive composition on the second electrode 220 . The adhesive composition may include a resin or silicone material, and a mixture of a monomer and a polymer may be provided. In addition, the adhesive composition may further include at least one additive selected from an antistatic agent, a surfactant, and a conductive polymer. The adhesive composition may be applied on a partial region of the second electrode 220 , and the adhesive layer 400 may be formed on a partial region of the second electrode 220 .

Thereafter, referring to FIG. 16 , the previously manufactured first substrate 110 and the second substrate 120 may be adhered. In detail, in the second substrate 120 , the second electrode 220 is disposed to face the light conversion unit 300 , and may be adhered to the light conversion unit 300 via the adhesive layer 400 . have.

In this case, the first substrate 110 and the second substrate 120 may be adhered in different directions. For example, the first substrate 110 and the second substrate 120 may be bonded to each other so that a long side direction of the first substrate 110 and a short side direction of the second substrate 120 overlap each other. .

Then, referring to FIG. 17 , a blocking layer 600 may be formed on the first substrate 110 . In detail, the blocking layer 600 may be disposed on the upper and lower portions of the receiving unit 320 disposed on the first substrate 110 . The blocking film 600 may be spaced apart from the receiving part 320 . That is, the receiving part 320 may be disposed between the blocking layers 600 . The blocking film 600 may form an injection space between the blocking film 600 and the receiving part 320 .

Then, referring to FIG. 18 , a light-transmitting variable material may be injected between the accommodating part 320 , that is, the partition wall parts 310 . In detail, the dispersion 320a including the light absorbing particles 320b may be injected between the receiving portions 320 , for example, between the barrier rib portions 310 . Accordingly, the aforementioned accommodating portion 320 may be formed between the partition wall portions 310 .

Then, referring to FIG. 19 , the sealing part 500 may be formed in a lateral direction of the receiving part 320 . Accordingly, the dispersion 320a including the light absorbing particles 320b accommodated in the accommodating part 320 may be sealed from the outside. Thereafter, by cutting the first substrate 110 , the optical path control member 1000 according to the embodiment may be formed.

20 is a cross-sectional view illustrating a display device to which a light path control member according to an embodiment is applied, and FIGS. 21 and 22 are diagrams illustrating an embodiment of a display device to which the light path control member according to the embodiment is applied. drawings for

First, referring to FIG. 20 , 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 control member 1000 and the display panel 2000 are adhered, the light path control member 1000 and the display panel 2000 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 matrix are formed on a first substrate 2100 , and a second substrate 2200 is bonded to the first substrate 2100 with a liquid crystal layer interposed therebetween. It 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 matrix may be omitted, and the common electrode may also serve as the black matrix.

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

In addition, an additional functional layer (not shown) 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 may be adhered to one surface of the first substrate 110 of the light path control member 1000 .

Also, although not shown in the drawings, the functional layer may be bonded to the first substrate 110 of the light path control member 1000 through a separate adhesive member. In addition, a release film for protecting the functional layer may be further disposed on the functional layer.

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

In addition, although it is illustrated in the drawings that the light path control member 1000 is disposed on the display panel 2000 , the embodiment is not limited thereto, and the light path control member 1000 is positioned at a position where light can be adjusted. , for example, under the display panel 2000 or between the first substrate 2100 and the second substrate 2200 of the display panel 2000, and the like.

Also, referring to FIGS. 21 and 22 , the light path control member 1000 may be applied to a display device.

For example, when power is not applied to the light path control member 1000 as shown in FIG. 21 , the accommodating unit 320 functions as a light blocking unit, so that the display device is driven in a light blocking mode, and as shown in FIG. When power is applied to the path control member 1000 , the accommodating part 320 functions as a light transmitting part, so that the display apparatus 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, although not shown in the drawings. The display device to which the light path control member 1000 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 1000 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.

Also, the light path control member 1000 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 1000 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 (11)

a first substrate;
a first electrode disposed on an upper surface of the first substrate;
a second substrate disposed on the first substrate;
a second electrode disposed on a lower surface of the second substrate;
a light conversion unit disposed between the first and second electrodes; and
An adhesive layer disposed between the second electrode and the light conversion unit,
The light conversion part includes a partition wall part and a receiving part which are alternately arranged,
The accommodating part includes a dispersion and a plurality of light absorbing particles disposed in the dispersion,
A log volume resistivity of the adhesive layer is 9 Ω·cm to 13 Ω·cm. The method of claim 1,
The adhesive layer contains a monomer,
The monomer is 2-ethylhexyl acrylate (2-Ethylhexyl Acrylate), 2-hydroxyethyl acrylate (2-Hydroxyethyl Acrylate), acrylic acid (Acrylic acid), isobornyl acrylate (Isobornyl Acrylate), methyl methacrylate ( An optical path control member comprising at least one of methyl methacrylate) and acrlyamide. 3. The method of claim 2,
The monomer is included in an amount of 5 wt % or less based on the total weight of the adhesive layer. 3. The method of claim 2,
The adhesive layer may further include at least one additive selected from an antistatic agent, a surfactant, and a conductive polymer. 3. The method of claim 2,
The additive is included in an amount of 10% by weight or less based on the total weight of the adhesive layer. The method of claim 1,
The thickness of the adhesive layer is 1㎛ to 40㎛ the light path control member. The method of claim 1,
The accommodating part has a light transmittance that changes according to an applied voltage, and changes to a light transmitting part when the voltage is not applied, and to a light blocking part when the voltage is applied. 8. The method of claim 7,
When the voltage is applied, the light absorbing particles move toward the first electrode or the second electrode. 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 an upper surface of the first substrate;
a second substrate disposed on the first substrate;
a second electrode disposed on a lower surface of the second substrate;
a light conversion unit disposed between the first and second electrodes; and
An adhesive layer disposed between the second electrode and the light conversion unit,
The light conversion part includes a partition wall part and a receiving part which are alternately arranged,
The accommodating part includes a dispersion and a plurality of light absorbing particles disposed in the dispersion,
A log volume resistance of the adhesive layer is 9 Ω·cm to 13 Ω·cm. 10. The method of claim 9,
The adhesive layer contains a monomer,
The monomer is 2-ethylhexyl acrylate (2-Ethylhexyl Acrylate), 2-hydroxyethyl acrylate (2-Hydroxyethyl Acrylate), acrylic acid (Acrylic acid), isobornyl acrylate (Isobornyl Acrylate), methyl methacrylate ( Methyl methacrylate), a display device comprising at least one of acrylamide (Acrlyamide). 11. The method of claim 10,
The monomer is included in an amount of 5 wt % or less based on the total weight of the adhesive layer.

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