KR20210133482A - Light route control member and display having the same - Google Patents

Abstract

In accordance with an embodiment, an optical 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 a housing part placed alternately. The housing part houses a light conversion substance. The partition part includes a side part supporting the housing part and a slope part located in an upper part of the side part. The height of the slope part can be within 5% of the whole height of the partition part. In accordance with an embodiment, a display device includes: a display panel; and an optical path control member placed on the display panel. The optical 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 a housing part placed alternately. The housing part houses a light conversion substance. The partition part includes a side part supporting the housing part and a slope part located in an upper part of the side part. The height of the slope part can be within 5% of the whole height of the partition part. Therefore, the present invention is capable of improving the adhesion property between the adhesive layer and the partition part.

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.

The dispersion in which the light conversion particles are dispersed may be filled in the pattern. In this case, there is a problem that the light conversion material may remain on the upper surface of the protruding pattern.

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

The embodiment relates to a light path control member having improved reliability by improving the filling efficiency of the light conversion material.

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 barrier rib portions and accommodating portions that are alternately disposed, the accommodating portion accommodating the light conversion material, and the barrier rib portion accommodating the accommodating portion It may include a side part supporting the part and an inclined part located on the upper part of the side part, and the height of the inclined part may be within 5% of the total height of the partition wall part.

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 barrier rib portions and accommodating portions that are alternately disposed, the accommodating portion accommodating the light conversion material, and the barrier rib portion accommodating the accommodating portion It may include a side part supporting the part and an inclined part located on the upper part of the side part, and the height of the inclined part may be within 5% of the total height of the partition wall part.

The light path control member according to the embodiment may increase front transmittance. In detail, in the embodiment, since the upper surface of the barrier rib has an inclination, the light conversion material may not remain on the upper portion of the barrier rib, and thus the front transmittance may be improved.

In addition, the optical path control member according to the embodiment may increase reliability by improving adhesion performance. In detail, in the embodiment, since the contact area between the adhesive layer and the partition wall may be increased by the inclined surface positioned on the upper portion of the partition wall, adhesive properties between the adhesive layer and the partition wall may be improved.

1 and 2 are views illustrating a perspective view of a light path control member according to an embodiment.
3 and 4 are perspective views of a first substrate, a first electrode, a second substrate, and a second electrode of a light path control member according to an embodiment, respectively.
5 to 17 are views for explaining a method of manufacturing a light path control member according to the embodiment and the comparative example.
9A is a diagram illustrating a perspective view of a light conversion unit in a manufacturing step of a light path control member according to a comparative example. FIG. 9B is a cross-sectional view taken along area AA′ of FIG. 9A in the manufacturing step of the light path control member according to the comparative example. 9C is a picture taken from the upper plane of the light conversion unit according to the comparative example.
12 is a cross-sectional view illustrating a light path control member according to a comparative example.
13A is a diagram illustrating a perspective view of a light conversion unit according to the first exemplary embodiment in a manufacturing step of the light path controlling member according to the exemplary embodiment. FIG. 13B is a cross-sectional view taken along area AA′ of FIG. 13A in the manufacturing step of the light path control member according to the embodiment.
14A is a diagram illustrating a perspective view of a light conversion unit according to a second exemplary embodiment in a manufacturing step of a light path control member according to the exemplary embodiment. 14B is a cross-sectional view taken along area AA′ of FIG. 14A in a manufacturing step of the light path control member according to the embodiment.
15A is a view illustrating a cross-sectional view of a light path control member according to the first embodiment taken along area AA′ of FIG. 1 . 15B is a cross-sectional view illustrating a light path control member according to the second embodiment taken along area AA′ of FIG. 1 .
18 and 19 are views illustrating cross-sectional views taken along area AA′ of FIG. 1 according to an exemplary embodiment.
20 and 21 are views illustrating cross-sectional views taken along area AA′ of FIG. 1 according to another exemplary embodiment.
22 and 23 are views illustrating cross-sectional views taken along area AA′ of FIG. 1 according to another exemplary embodiment.
24 is a cross-sectional view of a display device to which a light path control member according to an exemplary embodiment is applied.
25 to 27 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 the first substrate 110 . ), the second direction 2A may be defined as a longitudinal direction of the first substrate 110 perpendicular to the first direction 1A, and the third direction 3A. may be defined in the thickness direction of the first substrate 110 .

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

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

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

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

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

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

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

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

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

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

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

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

Also, the second substrate 120 may be a curved or bent substrate. That is, the optical path control member including the second substrate 120 may also be formed to have flexible, curved, or bent characteristics. For this reason, the light path control member according to the embodiment may be changed into various designs.

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

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

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

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

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

The second electrode 220 may be disposed on one surface of the second substrate 120 . In detail, the second electrode 220 may be disposed on the lower surface of the second substrate 120 . That is, the second electrode 220 may be disposed on a surface of the second substrate 120 and the first substrate 110 facing each other. That is, the second electrode 220 may be disposed to face the first electrode 210 on the first substrate 110 . That is, the second electrode 220 may be disposed between the first electrode 210 and the second substrate 120 .

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

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

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

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

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

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

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

The first substrate 110 and the second substrate 120 may have 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, which will 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 light transmission characteristics 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.

A method of manufacturing a light path controlling member according to Examples and Comparative Examples will be described with reference to FIGS. 5 to 17 .

Referring to FIG. 5 , 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 .

Next, referring to FIG. 6 , a resin layer 350 may be formed by coating a resin material on the first electrode 210 . In detail, the resin layer 350 may be formed by applying a urethane resin or an acrylic resin on the first electrode 210 .

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

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

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

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 .

Then, referring to FIG. 7 , 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.

The plurality of partition wall portions 310 and the plurality of accommodation portions 320 may be formed by various methods such as imprinting, molding, etching, and machining.

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. 8 , the light conversion material 320 ′ may be filled in the plurality of accommodation units 320 . For example, EPD ink may be injected into the plurality of accommodation units 320 . The injection or filling of the light conversion material may be formed by various methods such as dispensing, a doctor blade, and printing.

Next, referring to FIG. 10 , 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 .

Next, an adhesive layer 420 may be formed by applying an adhesive material on the second electrode 220 . In detail, a light-transmitting adhesive layer capable of transmitting light may be formed on the second electrode 220 . For example, the adhesive layer 420 may include an optically transparent adhesive layer (OCA). The adhesive layer 420 may be disposed on a partial region of the second electrode 220 .

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 .

Next, referring to FIG. 11 , the first substrate 110 and the second substrate 120 may be bonded by an adhesive layer 420 . For example, the light conversion unit 300 on the first substrate 110 may be adhered to the adhesive layer 420 located below the second substrate 120 by a roller.

Subsequently, referring to FIG. 16 , 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-converting material in which light-absorbing particles such as carbon black are dispersed may be injected into the accommodating part 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. 17 , 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.

The difference between the light conversion unit 300 in the comparative example and the embodiment will be described in detail below.

9A is a diagram illustrating a perspective view of a light conversion unit in a manufacturing step of a light path control member according to a comparative example. FIG. 9B is a cross-sectional view taken along area A-A' of FIG. 9A in the manufacturing stage of the light path control member according to the comparative example.

Referring to FIGS. 9A and 9B , in the comparative example, the light conversion material 320 ′ remains on the upper portion of the partition wall 310 . In the comparative example, since the upper surface 310T of the partition wall part 310 is flat, the residual material RI may be positioned on the upper surface 310T of the partition wall part 310 . That is, while the light conversion material 320 ′ is filled in the accommodating part 320 , the light conversion material remains on the upper portion of the barrier rib 310 , so that the residual material RI may be located. For example, the residual material RI may be an EPD ink.

9C is a picture taken from the upper plane of the light conversion unit according to the comparative example.

Referring to FIG. 9C , it can be seen that the residual material RI is present on the upper surface of the partition wall part 310 .

11 and 12 , it can be seen that the residual material RI on the upper surface of the barrier rib part 310 remains even after the first substrate and the second substrate are adhered. Accordingly, the light path control member according to the comparative example may have a problem in that the front transmittance is lowered by the residual material RI.

The first and second embodiments are for solving the problem of residual material (RI) remaining on the partition wall of the comparative example. To this end, the upper surface 310T of the partition wall part 310 of the embodiment may be an inclined surface. Since the central portion of the barrier rib 310 on the upper surface 310T of the barrier rib 310 forms an inclined surface to be higher than the outer portion of the barrier rib 310, the light conversion material is formed on the upper portion of the barrier rib 310 (320') may flow down without remaining. Here, the central portion of the upper surface 310T of the partition wall portion 310 may mean a portion having the highest height. The outer portion of the upper surface 310T of the partition wall portion 310 may mean a portion adjacent to the connection portion 313 connecting the side portion 311 and the inclined portion 312 . In detail, since the upper surface 310T of the partition wall part 310 forms a protrusion so that the central part of the partition wall part 310 has a height higher than the outer part of the partition wall part 310, the upper surface 310T of the partition wall part 310 has light on the upper part of the partition wall part. The conversion material 320' may flow down without remaining. For example, a central portion of the upper surface 310T of the partition wall portion 310 may have a height of 5 μm higher than an outer portion of the upper surface 310T of the partition wall portion 310 .

13 to 14 , it can be seen that no residual material is located on the upper surface 310T of the partition wall 310 in the manufacturing process of the light path control member according to the embodiment.

13A is a diagram illustrating a perspective view of a light conversion unit according to the first exemplary embodiment in a manufacturing step of the light path controlling member according to the exemplary embodiment. FIG. 13B is a cross-sectional view taken along area A-A' of FIG. 13A in the manufacturing step of the light path control member according to the embodiment.

13A and 13B , the upper surface 310T of the partition wall part 310 may include a curved surface.

14A is a diagram illustrating a perspective view of a light conversion unit according to a second exemplary embodiment in a manufacturing step of a light path control member according to the exemplary embodiment. FIG. 14B is a cross-sectional view taken along area A-A' of FIG. 14A in the manufacturing stage of the light path control member according to the embodiment.

14A and 14B , the upper surface 310T of the partition wall part 310 may include an inclined surface having a greater inclination than the side surface of the partition wall part. Accordingly, the distance from the upper surface 310T of the partition wall part 310 to the first substrate 110 may vary depending on the location.

For example, the upper surface 310T of the partition wall part 310 may include a portion having a different separation distance from the first substrate 110 . In detail, the shortest separation distance (height difference) of the upper surface 310T of the partition wall part 310 from the first substrate 110 may be greater in the central portion than in the outer portion.

For example, the upper surface 310T of the partition wall portion 310 may include a portion having a different separation distance from the second substrate 110 . In detail, the shortest separation distance (height difference) of the upper surface 310T of the barrier rib part 310 from the second substrate 120 may be greater in the outer portion than in the central portion.

Referring to FIGS. 13B and 14B , the width of the partition wall part 310 may decrease toward the upper surface. For example, in the side part 311 of the partition wall part 310 , the width may decrease at a constant rate toward the upper surface. For example, in the inclined portion 312 of the partition wall portion 310 , the width may decrease at a constant rate toward the upper surface. Alternatively, in the inclined portion 312 of the partition wall portion 310 , the width may decrease at a rate that changes toward the upper surface. Accordingly, the residual material may not be located on the upper surface of the inclined portion.

A width W3 in one region of the inclined portion 312 may be smaller than a width W1 in one region of the side portion 311 .

A width W1 of the side part 311 at a position separated from the connection part 313 by a first separation distance d may be greater than a width W2 of the connection part 313 . A width W3 of the inclined portion 312 may be smaller than a width W2 of the connecting portion 313 at a position separated from the connection portion 313 by a first separation distance d.

The difference between the width W1 of the side part 311 and the width W2 of the connection part 313 measured at the same distance from the connection part is the width W3 of the inclined part 312 and the It may be different from a difference in the width W2 of the connection part 313 . That is, since the inclined portion has a different inclination from the side portion, the reduction ratio of the width of the side portion and the inclined portion may be different from each other.

Accordingly, the light path control member according to the embodiment may have improved reliability by improving the filling efficiency of the light conversion material.

13 and 14 , the accommodating part 320 may accommodate the light conversion material 320 ′.

The partition wall part 310 of the embodiment may include a side part 311 , an inclined part 312 , and a connection part 313 connecting the side part 311 and the inclined part 312 . In detail, the partition wall portion 310 may include a side portion 311 supporting the receiving portion and an inclined portion 312 positioned above the side portion. That is, in the embodiment, the partition wall portion may include an inclined portion in order to improve the quality of the upper surface of the partition wall portion.

The side portion 311 may have an inclination close to a right angle. For example, the side part 311 may have a predetermined inclination with the first substrate.

The inclined portion 312 may mean a portion having a difference in inclination from the side portion. For example, the inclined portion 312 may have a different inclination from the side portion 311 from the connecting portion 313 as a starting point.

The side part 311 of the partition wall part 310 may directly contact the light conversion material 320 ′.

The inclined portion 312 may be a portion protruding from the side portion 311 . For example, the inclined portion 312 may refer to an upper portion of the partition wall extending away from the first substrate from the side portion 311 .

The inclined portion 312 may be positioned on a different plane from the light conversion material 320 ′. The inclined portion 312 may be disposed to have a step difference from the light conversion material 320 ′. In detail, the inclined portion 312 may be positioned higher than the light conversion material 320 ′.

The inclined portion 312 may be spaced apart from the light conversion material.

The inclined portion 312 may not entirely contact the light conversion material 320 ′. Alternatively, at least a portion of the inclined portion 312 may not contact the light conversion material 320 ′. For example, the central portion of the inclined portion 312 may not contact the light conversion material 320 ′. In detail, even when the outer portion of the inclined portion 312 contacts the light conversion material 320 ′, the central portion of the inclined portion 312 may not contact the light conversion material 320 ′. . Since the central portion of the inclined portion 312 protrudes higher from the first substrate than the outer portion, it may not come into contact with the light conversion material 320 ′.

The upper surface 310T of the partition wall part 310 may be positioned higher than the upper surface of the light conversion material located in the receiving part. Here, the high position may mean that the distance between the upper surface 310T of the barrier rib part 310 and the first substrate is greater than the distance between the upper surface of the light conversion material and the first substrate.

The height t2 of the inclined portion 312 may be within 5% of the total height t1 of the partition wall portion 310 . For example, when the total height of the partition wall portion is 100 μm, the height t2 of the inclined portion 312 may be within 5 μm. For example, the height t2 of the inclined portion 312 may be 3% to 5% of the total height t1 of the partition wall portion 310 . The height t2 of the inclined portion 312 may be within 3% of the total height t1 of the partition wall portion 310 . The height t2 of the inclined portion 312 may be within 1% of the total height t1 of the partition wall portion 310 .

When the height t2 of the inclined portion 312 is greater than 5% of the total height t1 of the partition wall portion 310, the inclined portion 312 when the light conversion material 230' is injected into the receiving portion. ), the light conversion material remains, which may cause a problem in which the front transmittance is lowered.

When the height t2 of the inclined portion 312 is less than 0.5%, as the height of the inclined portion is low, the light conversion material remains in the inclined portion 312 , and thus front transmittance may be reduced.

FIG. 15A is a cross-sectional view of a light path control member according to the first embodiment taken along a region A-A' of FIG. 1 . FIG. 15B is a cross-sectional view of a light path control member according to the second embodiment taken along area A-A' of FIG. 1 .

15A and 15B , the light conversion material 320 ′ located in the receiving unit 320 may have a higher height at the outer portion of the light conversion material 320 ′ than the central portion. In detail, the height h1 at the central portion of the light conversion material 320 ′ may be higher than the height h2 at the outer portion.

Here, the height h1 at the central portion of the light conversion material 320 ′ is measured in the central area of the light conversion material 320 ′ located in the receiving portion 320 , and the light conversion material 320 . ') can mean the total height of That is, the height h1 at the center of the light conversion material 320 ′ may mean the entire thickness at the center of the light conversion material 320 ′. Here, the height h2 at the outer portion of the light conversion material 320 ′ may mean a height difference between the central portion and the outer portion of the light conversion material 320 ′.

When the height h1 of the light conversion material 320 ′ measured from the center portion of the light conversion material 320 ′ located in the receiving portion 320 is 70 μm, the central portion of the light conversion material 320 ′ and the light The difference in height h2 of the outer portion of the conversion material 320 ′ may be 15 μm or less. For example, when the height h1 of the light conversion material 320' measured at the center of the light conversion material 320' located in the receiving part 320 is 70 µm, the light conversion material 320' A height h2 difference between the central portion and the outer portion of the light conversion material 320 ′ may be 10 μm or less. For example, when the height h1 of the light conversion material 320' measured at the center of the light conversion material 320' located in the receiving part 320 is 70 µm, the light conversion material 320' A height h2 difference between the central portion and the outer portion of the light conversion material 320 ′ may be 5 μm or less. For example, when the height h1 of the light conversion material 320' measured at the center of the light conversion material 320' located in the receiving part 320 is 70 µm, the light conversion material 320' A height h2 difference between the central portion and the outer portion of the light conversion material 320 ′ may be 2 μm or less. Accordingly, the light conversion material of the embodiment may have excellent filling efficiency and may not reduce the front transmittance.

The ratio of the height of the light conversion material 320' measured at the center of the light conversion material 320' and the height between the center portion of the light conversion material 320' and the outer portion of the light conversion material 320' is 35:1 or less. For example, the height of the light conversion material 320' measured from the center portion of the light conversion material 320' and the distance between the center portion of the light conversion material 320' and the outer portion of the light conversion material 320'. The ratio of the heights may be 15:1 or less. For example, the height of the light conversion material 320' measured from the center portion of the light conversion material 320' and the distance between the center portion of the light conversion material 320' and the outer portion of the light conversion material 320'. The ratio of the heights may be 7:1 or less. For example, the height of the light conversion material 320' measured from the center portion of the light conversion material 320' and the distance between the center portion of the light conversion material 320' and the outer portion of the light conversion material 320'. The ratio of the heights may be 5:1 or less. Accordingly, the light conversion material of the embodiment may have excellent filling efficiency and may not reduce the front transmittance.

Referring to FIG. 15 , an adhesive layer 420 may be disposed between the light conversion unit 300 and the second electrode 220 . The adhesive layer 420 may be disposed while surrounding the upper surface 310T of the partition wall part 310 and the upper surface of the light conversion material 320 ′.

The adhesive layer 420 is disposed between the second electrode 220 positioned above the adhesive layer 420 and the partition wall 310 and the light conversion material 320 ′ positioned below the adhesive layer 420 . can be located

The upper surface of the adhesive layer 420 may have a shape different from that of the lower surface of the adhesive layer 420 . An upper surface of the adhesive layer 420 may surround the second electrode 220 . The shape of the upper surface of the adhesive layer 420 may vary depending on the shape of the second electrode 220 .

The shape of the adhesive layer 420 may be changed by an external force applied in the bonding process. Accordingly, the lower surface of the adhesive layer 420 may simultaneously cover the upper end of the light conversion material 320 ′ having a height difference and the upper end of the partition wall 310 .

For example, on the lower surface of the adhesive layer 420 , the adhesive layer 420 and the inclined portion 312 contact the first adhesive surface 420B1 and the adhesive layer 420 and the light conversion material 320 ′. It may include a second adhesive surface 420B2 in contact. Here, the first adhesive surface 420B1 may mean a non-planar surface having a height difference between the central portion and the outer portion. Here, the second adhesive surface 420B2 may refer to a non-planar surface having a height difference between the central portion and the outer portion.

In the embodiment, since the upper surface 310T of the partition wall part 310 has an inclined surface, the contact area of the adhesive layer 420 with the upper surface of the partition wall part may increase. Accordingly, the reliability of the light path control member of the embodiment can be improved.

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

18 and 19 , the light conversion unit 300 may include a partition wall unit 310 and a receiving unit 320 .

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

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

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

The partition wall part 310 may include a transparent material. The barrier rib part 310 may include a material capable of transmitting light.

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

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

For example, in FIGS. 18 and 19 , 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.

Referring to FIGS. 20 and 21 , in the light path control member according to another embodiment, both ends of the receiving part 320 are in contact with the buffer layer 410 and the adhesive layer 420 differently from FIGS. 18 and 19 , and may be disposed. have.

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.

In addition, referring to FIGS. 20 and 21 , in the light path control member according to the embodiment, unlike FIGS. 18 and 19 , the receiving part 320 may be disposed while having a constant inclination angle θ.

In detail, referring to FIGS. 20 and 21 , the receiving part 320 may be disposed while having an inclination angle θ of greater than 0° to less than 90° with respect to the first substrate 110 . In detail, the accommodating part 320 may extend upwardly while having an inclination angle θ of greater than 0° to less than 90° with respect to one surface of the first substrate 110 .

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

below. A display device and a display device to which the light path control member according to the embodiment is applied will be described with reference to FIGS. 22 to 25 .

Referring to FIG. 22 , 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 .

23 and 24 , the light path control member according to the embodiment may be applied to a vehicle.

23 and 24 , 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. 23 , the accommodating unit functions as a light blocking unit, the display device is driven in the light blocking mode, and power is applied to the light path control member as shown in FIG. 24 . 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. 25 , 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 only one embodiment. Furthermore, features, structures, effects, etc. illustrated in each embodiment can be combined or modified for other embodiments by those of ordinary skill in the art to which the embodiments belong. Accordingly, the contents related to such combinations and modifications should be interpreted as being included in the scope of the present invention.

In addition, although the embodiments have been mainly 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 the range that does not depart from the essential characteristics of the present embodiment. It can be seen that various modifications and applications that have not been made are possible. For example, each component specifically shown in the embodiments may be implemented by modification. And the differences related to these modifications and applications should be construed as being included in the scope of the present invention defined in the appended claims.

Claims (10)

a first substrate;
a first electrode disposed on the first substrate;
a 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 receiving unit accommodates the light conversion material,
The partition wall portion includes a side portion supporting the receiving portion and an inclined portion located above the side portion,
The height of the inclined portion is within 5% of the total height of the partition wall portion. The method of claim 1,
and a height of the inclined portion is 15 μm or less. The method of claim 1,
The upper surface of the barrier rib portion is positioned higher than the upper surface of the light conversion material located in the receiving portion, the light path control member. The method of claim 1,
The upper surface of the partition wall portion includes a curved surface, the light path control member. The method of claim 1,
and the inclined portion includes an inclined surface having a greater inclination than the side portion. The method of claim 1,
The side portion is in direct contact with the light conversion material,
and the inclined portion protrudes from the side surface portion. The method of claim 1,
and a width in one region of the inclined portion is smaller than a width in one region of the side portion. The method of claim 1,
and a width of the partition wall portion decreases toward an upper surface thereof. The method of claim 1,
The adhesive layer is disposed while surrounding the upper surface of the barrier rib portion and the upper surface of the light conversion material, the light path control member. 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 receiving unit accommodates the light conversion material,
The partition wall portion includes a side portion supporting the receiving portion and an inclined portion located above the side portion,
The height of the inclined portion is disposed within 5% of the total height of the partition wall portion.

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