KR20220030671A - Light route control member and display having the same - Google Patents

Abstract

According to an embodiment of the present invention, a light path control member comprises: a first substrate; a first electrode disposed on the first substrate; a second substrate disposed on the first substrate; a second electrode under the second substrate; and a light conversion unit disposed between the first electrode and the second electrode. The light conversion unit includes a plurality of partition units, a plurality of accommodation units, and base units. A light conversion material is disposed in the accommodation units. The light conversion unit includes a first sealing unit sealing a light conversion material. The first sealing unit is extended from one end to another end direction. Another end of the first sealing unit is disposed to be extended in an inner region of the accommodating units.

Description

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

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

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

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

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

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

Such a switchable light blocking film is filled with a light conversion material containing particles that can move according to the application of voltage and a dispersion liquid dispersing them inside the receiving part, and the receiving part is changed into a light transmitting part and a light blocking part by dispersion and aggregation of the particles. can be implemented.

The light conversion material may be injected from the injection unit to the exit unit through a capillary method using one end of the receiving unit as the injection unit and the other end as the exit unit. Then, the injection part and the outlet part may be sealed with a sealing part to seal the light conversion material inside the receiving part.

Accordingly, when the sealing part is removed from the film, the light conversion material may leak to the outside, and thus the reliability and driving characteristics of the optical path control member may be deteriorated.

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

An embodiment is to provide an optical path control member having improved reliability and driving characteristics.

An optical path control member according to an embodiment includes: a first substrate; a first electrode disposed on the first substrate; a second substrate disposed on the first substrate; a second electrode disposed under the second substrate; and a light conversion unit disposed between the first electrode and the second electrode, wherein the light conversion unit includes a plurality of barrier rib portions, a plurality of accommodation portions and a base portion, and a light conversion material is disposed in the accommodation portion, and a first sealing part sealing the light conversion material, the first sealing part extending from one end to the other end, and the other end of the first sealing part extending into the inner region of the receiving part.

The light path control member according to the embodiment may improve adhesive properties of the sealing part.

In detail, by bending and disposing the sealing part sealing the light conversion material in the accommodating part in the inner direction of the accommodating part, the contact area of the sealing part may be increased.

Accordingly, since the adhesive area of the sealing part is increased, adhesive properties of the sealing part may be improved.

In addition, since the sealing part is bent in the inner direction of the accommodating part to increase the area of the sealing part, it is possible to effectively prevent the light conversion material from leaking out or external impurities from penetrating into the accommodating part.

Accordingly, the light path control member according to the embodiment may have improved reliability and transport characteristics.

1 is a diagram illustrating a perspective view of a light path control member according to an embodiment.
FIG. 2 is a view showing a cross-sectional view taken along area AA′ of FIG. 1 .
3 to 10 are views for explaining a process in which a light conversion material and a sealing unit are disposed in the light path control member according to the embodiment.
11 is a diagram illustrating an enlarged plan view of area B of FIG. 1 .
FIG. 12 is an enlarged view showing a region C of FIG. 11 .
13 to 15 are cross-sectional views illustrating a light path control member according to another exemplary embodiment.
16 and 17 are views illustrating cross-sectional views taken along a region DD′ of FIG. 1 .
18 and 19 are cross-sectional views illustrating a display device to which a light path control member according to an exemplary embodiment is applied.
20 to 22 are diagrams for explaining an embodiment of a display device to which a light path control member according to an embodiment is applied.

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

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

In addition, the terminology used in the embodiments of the present invention is for describing the embodiments and is not intended to limit the present invention. In this specification, the singular form may also include the plural form unless otherwise specified in the phrase, and when it is described as "at least one (or one or more) of A and (and) B, C", it can be combined with A, B, and C. It may 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 for distinguishing the component from other components, and are not limited to the essence, order, or order of the component by the term.

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

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

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

Hereinafter, an optical path control member according to an embodiment will be described with reference to the drawings.

1 is a diagram illustrating a perspective view of a light path control member according to an embodiment.

Referring to FIG. 1 , 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 , a light conversion unit 300 , It may include a first sealing part 510 and a second sealing part 520 .

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 410 may be disposed between the light conversion unit 300 and the first electrode 210 . For example, a transparent adhesive layer 410 capable of transmitting light may be disposed between the light conversion unit 300 and the first electrode 210 . For example, the adhesive layer 410 may include an optically clear adhesive (OCA).

Also, a buffer layer 420 may be disposed between the light conversion unit 300 and the second electrode 220 . Accordingly, the adhesive force between the light conversion unit 300 including the heterogeneous material and the first electrode 210 may be improved.

The light conversion unit 300 and the second electrode 220 may be adhered through the buffer layer 420 .

FIG. 2 is a view showing a cross-sectional view taken along region A-A' of FIG. 1 .

1 and 2 , the light conversion unit 300 may include a partition wall unit 310 , a receiving unit 320 , and a base unit 350 .

A plurality of the partition wall part 310 and the accommodating part 320 may be included, and the partition wall part 310 and the accommodating part 320 may be alternately disposed with each other. That is, one accommodating part 320 may be disposed between two adjacent partition wall parts 310 , and one partition wall part 310 may be disposed between two adjacent partition wall parts 320 .

Although five accommodating units are illustrated in FIG. 1 , this is illustrated for convenience of description, and the number of accommodating units may be tens or more.

The base part 350 may be disposed on the accommodation part 320 . In detail, the base part 350 may be disposed between the accommodation part 320 and the buffer layer 420 . Accordingly, the light conversion part 300 may be bonded to the second electrode 220 through the base part 350 and the buffer layer 420 .

The base part 350 is a region formed during an imprinting process for forming the partition wall part 310 and the receiving part 320 , and may include the same material as the partition wall part 310 .

The barrier rib part 310 may transmit light. In addition, the light transmittance of the accommodating part 320 may be changed according to the application of a voltage.

In detail, the receiving part 320 may be disposed to extend in one direction. A light conversion material 330 may be disposed in the receiving part 320 . The accommodating part 320 may have a variable light transmittance by the light conversion material 330 . The light conversion material 330 may include light conversion particles 330b that move according to the application of voltage and a dispersion 330a that disperses the light conversion particles 330b. In addition, the light conversion material 300 may further include a dispersant for preventing aggregation of the light conversion particles 330a.

The light conversion material 330 is disposed inside the receiving unit 320 , and a first sealing unit 510 is disposed at one end and the other end of the receiving unit 320 , respectively, so that the light converting material 330 is formed in the light conversion material 330 . It may be disposed inside the receiving part 320 .

Meanwhile, the first sealing part 510 may include a bent area. In detail, the first sealing part 510 may be disposed to extend from one end to the other end and extend in the inner direction of the receiving part 320 by the bent area. That is, the first sealing part 510 may be in direct contact with the receiving part 320 . That is, the first sealing part 510 may be in direct contact with the side surface of the partition wall part 310 and may also be in direct contact with the receiving part 320 .

Accordingly, the contact area of the first sealing part 510 may be increased. That is, since the first sealing part 510 is arranged to extend from one end to the other end in the direction of the other end and the other end extends to the inner region of the receiving unit 320 , it may be disposed in contact with the inner surface of the receiving unit 320 . can

Accordingly, the contact area of the first sealing part 510 may increase, so that the adhesive property of the first sealing part 510 may be improved. In addition, since the area of the first sealing part 510 disposed inside the receiving part 320 is increased, it is possible to effectively prevent the light conversion material 330 from leaking out.

Meanwhile, the light conversion material 330 and the first sealing part 510 may be disposed inside the receiving part 320 through a capillary method.

3 to 10 are diagrams for explaining a process of injecting and sealing the light conversion material 330 into the accommodating part 320 .

First, referring to FIGS. 3 and 4 , a plurality of regions may be formed on the second substrate 120 , the second electrode 220 , the buffer layer 420 , and the light conversion unit 300 .

FIG. 3 is a view showing a cross-sectional view of the receiving part 320 cut in the longitudinal direction, and FIG. 4 is a view showing a cross-sectional view of the partition wall part 310 cut in the longitudinal direction.

In detail, a sealing area SA and a dam area DA passing through the second substrate 120 , the second electrode 220 , the buffer layer 420 , and the light conversion unit 300 may be formed.

Also, the embodiment is not limited thereto, and only the sealing area may be formed without the dam area DA.

The sealing area SA may be an area into which a light conversion material and a sealing material are injected, and the dam area DA may be an area into which a dam material is injected.

The sealing area SA may include a first sealing area SA1 and a second sealing area SA2 facing each other. In detail, the sealing area SA may include the first sealing area SA1 and the second sealing area SA2 facing each other in the longitudinal direction of the accommodation part.

The first sealing area SA1 and the second sealing area SA2 pass through the second substrate 120 , the second electrode 220 , the buffer layer 420 , and the base part 350 , and the It may be formed by completely or partially removing the barrier rib portion 310 of the light conversion unit 300 .

Accordingly, the end of the first sealing area SA1 and the end of the second sealing area SA2 may meet with both ends of the accommodation part 320 , respectively.

Accordingly, a light conversion material is injected into the accommodating part 320 through the first sealing area SA1 and the second sealing area SA2, and the accommodating part 320 is then injected with the sealing material. ) can seal the light conversion material inside.

4 shows that both the base part 350 and the partition wall part 310 are formed through, but the embodiment is not limited thereto, and the first sealing area SA1 and the second sealing area SA1 are The partition wall part 310 may be partially removed.

A passage for injecting the light conversion material 330 may be formed in the receiving part 320 by the first sealing area SA1 and the second sealing area SA2 .

In detail, an injection part IA into which the light conversion material 330 is injected may be formed in the accommodating part 320 by the second sealing area SA2, and by the first sealing area SA1 An outlet portion EA through which the light conversion material 330 is removed may be formed in the receiving portion 320 . Accordingly, the injection part IA may be formed at one end of the accommodating part, and the outlet part EA may be formed at the other end of the accommodating part.

The dam area DA may be spaced apart from the sealing area SA and disposed outside the sealing area SA.

The dam area DA may include a first dam area DA1 and a second dam area DA2 facing each other. In detail, the dam area DA may include the first dam area DA1 and the second dam area DA2 facing each other in the longitudinal direction of the accommodation part.

The first dam area DA1 may be disposed outside the first sealing area SA1 , and the second dam area DA2 may be disposed outside the second sealing area SA2 .

In the first dam area DA1 and the second dam area DA2 , the second substrate 120 , the second electrode 220 , the buffer layer 420 and the base part 350 pass through, and the The barrier rib part 310 of the light conversion part 300 may be formed by removing all or part of it.

Although FIG. 4 illustrates that both the base part 350 and the partition wall part 310 are penetrated, the embodiment is not limited thereto, and the partition wall part 310 may be formed by being partially removed.

Also, as described above, the dam area DA may be omitted. That is, only the sealing area SA may be formed.

For convenience of description, the following exemplary embodiment will be mainly described with respect to the case in which the dam area DA is present, but the exemplary embodiment is not limited thereto.

Next, referring to FIG. 5 , the dam unit 600 may be disposed in the dam area DA. In detail, a dam unit 600 may be disposed in the first dam area DA1 and the second dam area DA2 .

The dam part 600 may be disposed while filling the inside of the dam area DA. The dam unit 600 may serve to prevent the light conversion material from overflowing to the outside when the light conversion material 330 is injected through the injection unit IA and the outlet unit EA.

The dam part 600 may include a bending area DCA. In detail, the dam unit 600 may be disposed inside the dam area DA and inside the accommodation unit 320 . That is, the dam part 600 may be bent in the dam area DA to extend in an inner direction of the accommodation part 320 .

In detail, the dam part 600 may be disposed to extend in one longitudinal direction and the other length direction of the accommodating part 320 in the accommodating part while filling the dam area DA. In detail, the dam part 600 may be disposed to extend to a point where the sealing area SA starts.

The dam unit 600 may include a resin material. For example, the dam unit 600 may include polyurethane acrylate. That is, the dam part 600 may be formed by disposing the resin material in the dam area DA and the accommodating part 320 and then curing the resin material.

Then, referring to FIG. 6 , the light conversion material 330 may be disposed in the receiving part 320 through the injection part IA and the exit part EA. In detail, the light conversion material 330 applies the light conversion material to the injection part IA, and then moves the light conversion material in the direction of the exit part EA through a capillary process to form the receiving part 320 . ) can be placed inside.

Accordingly, the light conversion material 330 may be filled in the sealing areas and inside the receiving part 320 between the dam parts 600 .

Then, referring to FIG. 7 , the light conversion material 330 of the sealing area SA and a portion of the light conversion material 330 filled in the accommodating part may be removed. In detail, after blocking the second sealing area SA2 on the exit part EA side so that the light conversion material inside the receiving part 320 does not move, the first sealing area on the injection part IA side ( After washing SA1) and blocking the first sealing area SA1 on the injection part IA side, the second sealing area SA2 on the exit part EA side is washed, the sealing area SA The light conversion material disposed therein may be removed.

Accordingly, the light conversion material disposed in the sealing area SA and the light conversion material in a partial area of the accommodating part 320 may be removed to form a space S in which the sealing material is disposed.

Alternatively, after blocking the second sealing area SA2 on the exit part EA side so that the light conversion material inside the receiving part 320 does not move, the first sealing area on the injection part IA side ( After washing SA1), placing a sealing material in the first sealing area SA1 on the injection part IA side to block the first sealing area SA1 on the injection part IA side, the outlet part ( By washing the second sealing area SA2 on the EA) side, the light conversion material disposed inside the sealing area SA may be removed.

Subsequently, referring to FIG. 8 , a sealing material may be filled in the sealing area SA. The sealing material may also be disposed inside the accommodating part 320 . That is, the sealing material may extend into the receiving part in the longitudinal direction of the receiving part while filling the sealing area SA.

In detail, after the sealing material is applied to the first sealing area SA1 on the injection part IA side, the sealing material is transferred through a capillary process through the second sealing area SA2 on the exit part EA side. It may be disposed to extend into the receiving portion 320 . Similarly, after the sealing material is applied to the second sealing area SA2 on the side of the outlet EA, the sealing material is subjected to a capillary process through the first sealing area SA1 on the side of the injection unit IA. It may be arranged to extend to the inside of the receiving part 320 .

That is, the sealing material may be disposed to extend in the longitudinal direction of the accommodation portion so as to be in contact with the light conversion material disposed inside the accommodation portion 320 .

Subsequently, by curing the sealing material, the first sealing part 510 may be disposed on the light conversion part 300 . The first sealing part 510 is disposed while extending from the sealing area SA to the receiving part 320 . That is, the first sealing part 510 extending from one end to the other end is disposed to extend in the inner direction of the receiving part 320 in the sealing area SA, and thereby the first sealing part 510 is disposed. may include a bending area CA. For example, the first sealing part 510 may be disposed in an “L” shape. That is, the first sealing part 510 may be arranged in an “L” shape by a bending area based on one receiving part.

In this case, the curing of the sealing material of the first sealing area SA1 and the second sealing area SA2 may be performed simultaneously or sequentially.

For example, after cleaning the first sealing area SA1 and the second sealing area SA2, a sealing material is disposed in the first sealing area SA1 and the second sealing area SA2, respectively. In this case, the sealing material of the first sealing area SA1 and the second sealing area SA2 may be simultaneously cured or sequentially cured.

Alternatively, after cleaning the first sealing area SA1 , a sealing material is disposed in the first sealing area SA1 , and then, the second sealing area SA2 is washed and the second sealing area SA2 is washed. ), the sealing material of the first sealing area SA1 may be cured first, and then the sealing material of the second sealing area SA2 may be cured.

Then, referring to FIGS. 9 and 10 , an unnecessary bezel area may be removed by cutting the dam part 600 and the sealing part 500 through a cutting process.

9 and 10 show that the dam region is cut at the outlet side and the first sealing unit 510 is cut at the injection unit side, but the embodiment is not limited thereto, and the cut region is defined as various positions can be

According to the above process, the light path control member having the shape shown in FIGS. 1 and 2 may be formed.

Referring to FIG. 2 , the first sealing part 510 may include a 1-1 sealing part 511 and a 1-2 sealing part 512 .

The 1-1 sealing part 511 and the 1-2 sealing part 512 may be in contact with the light conversion material 330 and may be disposed to face each other. The 1-1 sealing part 511 may be defined as a sealing part disposed in an outlet region of the receiving part 320 , and the 1-2 sealing part 512 is an injection of the receiving part 320 . It may be defined as a sealing part disposed in the sub-region.

The 1-1 sealing part 511 extending from one end to the other end may be disposed to extend in the inner direction of the receiving part 320 in the first sealing area SA1. Accordingly, the other end of the 1-1th sealing part 511 may be disposed inside the receiving part 320 .

That is, the 1-1 sealing part 511 may include a bending area SCA between one end and the other end of the 1-1 sealing part 511 .

That is, the 1-1 th sealing part 511 may include a bent area SCA that is bent while extending from the first sealing area SA1 in the longitudinal direction of the receiving part 320 .

Accordingly, the 1-1 sealing part 511 is formed on an inner surface of the first sealing area SA1 , an upper surface or a lower surface of the buffer layer 410 , an inner surface of the accommodating part 320 , and a partition wall part. It can be placed in contact with the side of the 310,

In addition, the first and second sealing parts 512 extending from one end to the other end may be arranged to extend in the inner direction of the receiving part 320 in the second sealing area SA2 . Accordingly, the other end of the first 1-2 sealing part 512 may be disposed inside the receiving part 320 .

That is, the 1-2 sealing part 512 may include a bending area SCA between one end and the other end of the 1-2 sealing part 512 .

That is, the first and second sealing parts 512 may include a bent area SCA that is bent while extending from the second sealing area SA2 in the longitudinal direction of the receiving part 320 . The first and second sealing parts 512 may include an inner surface of the second sealing area SA2 , an upper surface or a lower surface of the buffer layer 410 , an inner surface of the receiving part 320 , and the partition wall part 310 . It can be placed in contact with the side of the

Accordingly, the 1-1 sealing part 511 and the 1-2 sealing part 512 include a sealing part disposed in the sealing region, a sealing part disposed in the bending region, and a sealing part disposed inside the receiving part. may include In addition, the 1-1 sealing part 511 and the 1-2 sealing part 512 are integrated with the sealing part disposed in the sealing area, the sealing part disposed in the bending area, and the sealing part disposed inside the receiving part. can be formed with

The 1-1 sealing part 511 and the 1-2 sealing part 512 may extend to the inside of the accommodation part 320 through the bending area. At this time, the 1-1 sealing part 511 and the 1-2 sealing part 512 inside the accommodation part 320 have an area OA overlapping the sealing area SA and a non-overlapping area. It can be defined as (NOA).

Accordingly, the length L of the 1-1 sealing part 511 and the 1-2 sealing part 512 in the direction of the receiving part 320 is a first length corresponding to the overlapping area OA. It may have a second length L2 corresponding to (L1) and the non-overlapping area NOA.

That is, the 1-1 sealing part 511 and the 1-2 sealing part 512 may include a first length disposed in the sealing area and a second length disposed inside the accommodation part. Accordingly, the total length of the 1-1 sealing part 511 and the overall length of the 1-2 sealing part 512 may be defined as the sum of the first length and the second length.

The first length L1 may be 3 mm or less. In detail, the first length L1 may be 100 μm to 2 mm. In more detail, the first length L1 may be 300 μm to 700 μm. In more detail, the first length L1 may be 400 μm to 600 μm.

When the first length L1 exceeds 3 mm, an unnecessary bezel area may increase due to an increase in the width of the sealing area SA. In addition, when the first length L1 is less than 200 μm, it is difficult to inject the sealing material through the sealing area DA, and the sealing material may overflow to the outside during the injection process.

The second length L2 may be 2 mm or less. In detail, the second length L2 may be 100 μm to 2 mm. In more detail, the second length L2 may be 200 μm to 1 mm. In more detail, the second length L2 may be 300 μm to 700 μm. In more detail, the second length L2 may be 400 μm to 550 μm.

When the second length L2 is less than 100 μm, the sealing effect of the light conversion material 330 may be reduced, and the 1-1 sealing part 511 or the 1-2 sealing part 512 may be reduced. ), the contact area may be reduced, so that the adhesive properties of the sealing part may be deteriorated. In addition, a phenomenon in which the sealing part is lifted may occur in the bent region, and the adhesive properties may be deteriorated.

In addition, when the second length L2 is greater than 2 mm, the area in which the sealing part is disposed is increased too much, so that an unnecessary bezel area may increase.

11 and 12 are views for explaining length deviations in the direction of the accommodating part of the 1-1 th sealing part 511 and the 1-2 th sealing part 512 disposed in the plurality of accommodating parts.

11 and 12 , the accommodating part 320 may include a plurality of accommodating parts. A first sealing part 510 and a light conversion material 330 may be disposed in the receiving part 320 . That is, the above-described first sealing parts 510 may be disposed at both ends of each receiving part, and a light conversion material may be disposed between the first sealing parts 510 .

The first sealing parts 510 may have a first length L1 and a second length L2 in the direction of the receiving part. That is, as described above, the total length L of the first sealing part 510 may be defined as the sum of the first length L1 and the second length L2 .

The length L of the first sealing part corresponding to each receiving part may be similar or may be arranged to have different lengths. In detail, the length L of the first sealing part may be arranged differently by the deviation length VL.

That is, the second length L2 may be differently disposed in each accommodation portion, and accordingly, the first sealing portion may have a different length in each accommodation portion due to the deviation length VL.

In detail, the maximum deviation length VL of the first sealing part may be 100 μm or less. In more detail, the maximum deviation length VL of the first sealing part may be 1 μm to 100 μm. In more detail, the maximum deviation length VL of the first sealing part may be 20 μm to 80 μm. In more detail, the maximum deviation length VL of the first sealing part may be 30 μm to 70 μm. In more detail, the maximum deviation length VL of the first sealing part may be 40 μm to 60 μm.

In addition, the maximum deviation length VL of the first sealing part may be 50% or less of the first length L1 of the sealing part. In detail, the maximum deviation length VL of the first sealing part may be 1% to 50% or less of the first length L1 of the sealing part. In detail, the maximum deviation length VL of the first sealing part may be 2% to 40% or less of the first length L1 of the sealing part. In detail, the maximum deviation length VL of the first sealing part may be 3% to 30% or less of the first length L1 of the sealing part. In detail, the maximum deviation length VL of the first sealing part may be 4% to 20% or less of the first length L1 of the sealing part.

When the deviation length VL of the first sealing portion exceeds 100 μm or the first length L1 of the sealing portion exceeds 50% DML, a deviation in the content of the light conversion material disposed inside the accommodating portion may occur. Accordingly, the luminance uniformity of the optical path control member may be deteriorated according to the content deviation.

The length deviation of the first sealing parts 510 may be caused by a change in the capillary effect of the sealing material in the plurality of accommodating parts when the sealing parts are disposed inside each accommodating part. That is, a deviation in the size of the cross-sectional area of the accommodation portion may occur in each accommodation portion due to the deviation of the pitch P of the partition wall portions 310, and a deviation in the capillary effect of the sealing material may occur according to the cross-sectional area deviation. there is.

In order to satisfy the first sealing portion deviation as described above, the pitch deviation of the barrier rib portions 310 may be 40 μm or less. In detail, the pitch deviation of the barrier rib portions 310 may be 0.001 μm to 40 μm. In detail, the pitch deviation of the barrier rib portions 310 may be 0.001 μm to 30 μm. In detail, the pitch deviation of the barrier rib portions 310 may be 0.001 μm to 20 μm. In detail, the pitch deviation of the barrier rib portions 310 may be 0.001 μm to 10 μm.

The first length L1 , the second length L2 , and the deviation length VL may have different sizes.

The first length L1 may be greater than the second length L2 and the deviation length VL. Also, the second length L2 may be greater than the deviation length VL.

For example, the second length L2 may be 90% or more of the first length L1. Alternatively, the second length L2 may be 80% or more of the first length L1. Alternatively, the second length L2 may be 70% or more of the first length L1. Alternatively, the second length L2 may be 60% or more of the first length L1. Alternatively, the second length L2 may be 50% or more of the first length L1.

By making the first length L1 larger than the second length L2 , an increase in the bezel area due to the sealing part disposed inside the receiving part 320 may be minimized.

Meanwhile, the sealing material forming the first sealing part 510 may include a material having a low viscosity. Accordingly, it is possible to effectively move the sealing material to the inner region of the accommodating part by the capillary process.

In detail, the sealing material may have a viscosity of 1300 cP or less. Specifically, the sealing material may have a viscosity of 1200cp to 1300cP,

In addition, the sealing material may include a material that is curable by light and has low reactivity with the light conversion material. For example, the sealing material may include the same material as the material forming the dam portion. For example, the sealing material may include polyurethane acrylate.

Hereinafter, various embodiments of the light path control member according to the embodiment will be described with reference to FIGS. 13 to 15 .

Referring to FIG. 13 , the lengths of the 1-1 sealing part 511 and the 1-2 sealing part 512 in the direction of the receiving part may be different.

In detail, the length L-1 of the 1-1 sealing part 511 is greater than the length L-2 of the 1-2 sealing part 512 or the 1-2 length of the sealing part 511. The length L-2 of the sealing part 512 may be greater than the length L-1 of the 1-1th sealing part 511 .

Accordingly, when the light path control member is applied to a display device, the sealing reliability can be improved while maintaining the size of the light path control member.

That is, when the light path control member is applied to a display device such as a notebook computer or a monitor, the light path control member may be used by standing at an angle of 45° to 90°. Accordingly, since any one sealing part of the 1-1 sealing part 511 and the 1-2 sealing part 512 is disposed at the lower part, the light conversion material may flow more easily than the other sealing parts due to gravity. there is.

Accordingly, the sealing portion disposed at the lower portion of the length L-1 of the 1-1 sealing portion 511 in the direction of the receiving portion and the length L-2 of the 1-2 sealing portion 512 during use. By forming the portion to be longer, it is possible to effectively prevent leakage of the light conversion material to the outside. In addition, the length of the sealing portion disposed on the upper portion is formed to be short, and the length of the entire sealing portion is maintained, so that the size of the light path control member may be maintained. In addition, through this, the size of the overall bezel area can be reduced.

Referring to FIG. 14 , a mixing region 800 may be disposed between the first sealing part 510 inside the receiving part 320 and the light conversion material 330 .

The mixing region 800 may be a region in which the sealing material and the light conversion material are mixed. When the amount of the sealing material in the mixing region 800 is greater than the amount of the light conversion material, the mixing region 800 may be cured to serve as a sealing part. Alternatively, when the amount of the light-converting material in the mixing region 800 is greater than the amount of the sealing material, the mixing region 800 may serve as a light-converting material.

Referring to FIG. 15 , the first sealing part 510 may be formed by being bent in a plurality of directions.

In detail, the first sealing part 510 may be disposed to extend in one longitudinal direction and the other longitudinal direction of the accommodating part based on the sealing area SA. In detail, the first sealing part 510 may include a first bent region C1 extending in the direction of the light conversion material 330 and a second bent region C2 extending in the direction of the dam part 600 . there is.

, the length of the first bent area C1 and the second bent area C2 in the direction of the receiving part may be the same. Alternatively, lengths of the first bent area C1 and the second bent area C2 in the direction of the receiving part may be different from each other.

As the second bent region C2 is formed, it is possible to prevent a gap from being formed between the dam part 600 and the first sealing part 510 . Accordingly, it is possible to prevent the void from being visually recognized from the outside, and it is possible to prevent luminance non-uniformity due to a difference in transmittance of the accommodating part due to the void.

Hereinafter, an optical path control member including the above-described first sealing part will be described in detail with reference to FIGS. 1, 16 and 17 .

1, 16 and 17 , 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 source. It may include a converter 300 .

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

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

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

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

Also, the first substrate 110 may be a curved or bent substrate. That is, the optical path control member including the first substrate 110 may also be formed to have flexible, curved, or bent characteristics. For this reason, the light path control member according to the embodiment may be changed into various designs.

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

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

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

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

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

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

The first electrode 210 may have a thickness of about 10 nm to about 300 nm.

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

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

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

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

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

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

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

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

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

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

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

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

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

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

The second electrode 220 may be disposed on one surface of the second substrate 120 . In detail, the second electrode 220 may be disposed on the lower surface of the second substrate 120 . That is, the second electrode 220 may be disposed on a surface of the second substrate 120 where the second substrate 120 and the first substrate 110 face 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 300 nm.

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

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

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

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

The first substrate 110 and the second substrate 120 may include protrusions. 16 to 18 , the first substrate 110 may include a first protrusion, and the second substrate 120 may include a second protrusion. In detail, the first substrate 110 and the second substrate 120 may each include a first protrusion and a second protrusion that are displaced from each other.

A connection region connected to an external printed circuit board or a flexible printed circuit board may be formed in the first protrusion PA1 of the first substrate 110 and the second protrusion of the second substrate 120 , respectively.

In detail, a first connection area CA1 may be disposed on the first protrusion, and a second connection area CA2 may be disposed on the second protrusion. When the first protrusion and the second protrusion are disposed at positions that are displaced from each other, the first connection area CA1 and the second connection area CA2 may be disposed so as not to overlap in the third direction 3A. there is.

The first connection area CA1 and the second connection area CA2 may be disposed on the same surface. Alternatively, the first connection area CA1 and the second connection area CA2 may be disposed on different surfaces.

When the first connection area CA1 and the second connection area CA2 are disposed on the same surface, the first connection area CA1 and the second connection area CA2 and the printed circuit board or flexible printing When connecting to the circuit board, since it can be connected on the same surface, it can be easily connected.

A conductive material may be exposed on upper surfaces of the first connection area CA1 and the second connection area CA2 , respectively. For example, the first electrode 210 is exposed in the first connection area CA1 , and the electrode connection part 700 filled in the hole formed in the second substrate 120 is provided in the second connection area CA2 . may be exposed. The optical path control member may be electrically connected to an external printed circuit board or a flexible printed circuit board through the first connection area CA1 and the second connection area CA2 .

For example, a pad part is disposed on the first connection area CA1 and the second connection area CA2, and an anisotropic conductive film (ACF) is disposed between the pad part and the printed circuit board or flexible printed circuit board; A conductive adhesive including at least one of anisotropic conductive pastes (ACP) may be disposed to connect the conductive adhesives.

Alternatively, between the first connection area CA1 and the second connection area CA2 and the printed circuit board or flexible printed circuit board, an anisotropic conductive film (ACF) and an anisotropic conductive paste (ACP) comprising at least one Conductive adhesives can be placed for direct connection without padding.

The light path control member may include a plurality of sealing parts.

1, 16 and 17 , the light path control member includes a first sealing part 510 extending in a first direction of the light path controlling member and a second direction of the light path controlling member. A second sealing part 520 may be included.

The first sealing part 510 may extend in a direction different from the longitudinal direction of the receiving part 320 . In addition, the second sealing part 520 may extend in the same or similar direction to the longitudinal direction of the receiving part 320 .

The first sealing part 510 may be disposed at both end areas of the light path control member in the second direction. In detail, the first sealing part 510 may be disposed at one end and the other end of the light path control member in the second direction, respectively.

In addition, the second sealing part 520 may be disposed at both end areas of the light path control member in the first direction. In detail, the second sealing part 520 may be disposed at one end and the other end of the light path control member in the first direction.

The first sealing part 510 may be formed by the process described above. In addition, the second sealing part 520 also partially or completely seals the second substrate 120 , the second electrode 220 , the buffer layer 420 , the base part 350 , and the partition wall part 310 . It may be formed by disposing a sealing material inside the sealing area formed by removing the sealing material.

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.

For example, an adhesive layer 410 is disposed between the first electrode 210 and the light conversion unit 300 , whereby the first substrate 110 and the light conversion unit 300 may be adhered to each other. there is.

In addition, a buffer layer 420 is disposed between the second electrode 220 and the light conversion unit 300, whereby the second electrode 220 and the light conversion unit ( 300) can improve the adhesion.

The light conversion unit 300 may include a plurality of partition walls 310 and a receiving unit 320 . A light conversion material 330 including light conversion particles moving according to the application of a voltage and a dispersion liquid for dispersing the light conversion particles may be disposed in the receiving unit 320 , and a light path controlling member is formed by the light conversion particles may change the light transmission characteristics.

In addition, the first sealing portion 510 for the above-described light conversion material 330 and a dam portion 600 for easily injecting the light conversion material 330 may be disposed in the receiving portion 320 .

The receiving part 320 may be disposed to extend in one direction. In detail, the accommodating part 320 may extend in a direction corresponding to the second direction 2A of the first substrate 110 or the second substrate 120 . That is, the accommodating part 320 may be disposed to extend in a direction corresponding to the width direction of the first substrate 110 or the second substrate 120 .

Accordingly, both ends of the receiving part 320 of the light path control member according to the embodiment may be disposed to face both ends of the first substrate 110 or the second substrate 120 , respectively. That is, one end of the accommodating part 320 is disposed to face one end of the first substrate 110 or the second substrate 120 in the second direction 2A, and the accommodating part 320 . The other end of the first substrate 110 or the second substrate 120 may be disposed to face the other end in the second direction 2A.

Accordingly, both ends of the accommodating part 320 may be disposed in contact with the first sealing part 510 disposed to face in the second direction 2A, and may be disposed in contact with the second sealing part 520 and They may be spaced apart.

On the other hand, the accommodating part 320 may be disposed to extend to the second protrusion, and the accommodating part 320 on the second protrusion does not contain a light-converting material or contains a different light-converting material. may contain less than

Meanwhile, the accommodating part 320 may be disposed to be tilted at a predetermined angle with respect to the second direction of the first substrate 110 or the second substrate 120 .

That is, the accommodating part 320 may be disposed to be inclined at a predetermined angle with respect to the second direction of the light path control member.

Accordingly, when the light path control member and the display panel are coupled to form a display device, the moire phenomenon may be prevented from overlapping the pattern of the receiving portion of the light path controlling member and the pixel pattern of the display panel.

Accordingly, when the user views the display device from the outside, it is possible to prevent the pattern from being viewed due to the moire phenomenon caused by the overlapping of the pattern of the receiving part of the light path control member and the pattern of the pixel of the display panel.

16 and 17 are views illustrating a cross-sectional view taken along line D-d' of FIG. 1 .

16 and 17 , the light conversion unit 300 may include a partition wall unit 310 and a receiving unit 320 .

The partition wall part 310 may be defined as a partition wall area dividing the accommodation part. That is, the barrier rib portion 310 may transmit light as a barrier rib region partitioning a plurality of accommodation units. That is, light emitted from the direction of the first substrate 110 or the second substrate 120 may pass through the barrier rib portion.

The receiving part 320 may be formed to partially penetrate the light converting part 300 . Accordingly, the receiving part 320 may be disposed to be in contact with the adhesive layer 410 and may be disposed to be spaced apart from the buffer layer 420 . Accordingly, the base part 350 may be formed between the accommodating part 320 and the buffer layer 420 .

The base part 350 may be disposed on the partition wall part 310 . In detail, the base part 350 may be disposed under the second electrode 220 , and the partition wall part 310 may be disposed under the base part 350 .

The partition wall part 310 and the base part 350 may include a resin material. For example, the partition wall part 310 and the base part 350 may include a photo-curable resin material. For example, the partition wall part 310 and the base part 350 may include a UV resin or a transparent photoresist resin. Alternatively, the partition wall portion 310 and the base portion 350 may include a urethane resin or an acrylic resin.

The partition wall part 310 and the accommodating part 320 may be disposed to extend in the second direction 2A of the first substrate 110 and the second substrate 120 . That is, the partition wall part 310 and the accommodating part 320 may be disposed to extend in a width direction or a length direction of the first substrate 110 and the second substrate 120 .

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

In addition, the accommodating part 320 may be formed in a shape extending from the first electrode 210 to the second electrode 220 and narrowing in width.

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 .

A light conversion material 330 including a light conversion particle 330a and a dispersion 330b in which the light conversion particle 330a is dispersed may be disposed in the receiving unit 320 .

The dispersion 330b may be a material for dispersing the light conversion particles 330a. The dispersion 330b may include a transparent material. The dispersion 330b may include a non-polar solvent. In addition, the dispersion 330b may include a material capable of transmitting light.

The light conversion particles 330a may be dispersed in the dispersion 330b. In detail, the plurality of light conversion particles 330a may be disposed to be spaced apart from each other in the dispersion 330b.

The light conversion particles 330a may include a material capable of absorbing light. That is, the light conversion particle 330a may be a light absorbing particle, and the light conversion particle 330a may have a color. For example, the light conversion particles 330a may have a black-based color. For example, the light conversion particles 330a may include carbon black particles.

The light conversion particle 330a may have a polarity due to its surface being charged. For example, the surface of the light conversion particle 330a may be negatively charged. Accordingly, according to the application of the voltage, the light conversion particles 330a 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 330a. 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 330a. That is, the accommodating part 330a may change the transmittance of the light passing through the accommodating part 320 by dispersion and aggregation of the light conversion particles 330a disposed therein in the dispersion 330b.

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

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

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

The conversion from the first mode to the second mode, that is, the conversion of the accommodating part 320 from the light blocking part to the light transmitting part, may be implemented by the movement of the light conversion particles 330a of the accommodating part 320 . can That is, the light conversion particle 330a 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 particles 330a may be electrophoretic particles.

For example, when no voltage is applied to the optical path control member from the outside, the light conversion particles 330a of the accommodating part 320 are uniformly dispersed in the dispersion 330b, and accordingly, the accommodating part ( Light 320 may be blocked by the light conversion particles 330a. Accordingly, in the first mode, the receiving unit 320 may be driven as a light blocking unit.

Also, when a voltage is applied to the light path control member from the outside, the light conversion particles 330a may move. For example, the light conversion particle 330a 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 330a may move in the direction of the first electrode 210 or the second electrode 220 .

For example, 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 . and the negatively charged light conversion particles 330a may be moved toward the positive electrode of the first electrode 210 and the second electrode 220 using the dispersion 330b as a medium.

For example, in the initial mode or when no voltage is applied to the first electrode 210 and/or the second electrode 220 , as shown in FIG. 16 , the light conversion particles 330a are the dispersion liquid 330b. It is uniformly dispersed in the accommodating 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 FIG. 17 , the light conversion particle 330a is a second electrode in the dispersion 330b. It may move in the (220) direction, that is, the light conversion particles 330a may be moved in one direction, and the receiving unit 320 may be driven as a light transmitting unit.

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. there is.

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

The second sealing part 520 described above may be disposed on the outermost side of the light path control member. In detail, second sealing parts 520 extending in the second direction 2A and facing each other may be disposed on the outermost side of the light path control member in the first direction 1A.

The second sealing part 520 may be disposed inside the sealing area formed on the second substrate 120 .

For example, on the second substrate 120 , the second substrate 120 , the second electrode 220 , the buffer layer 420 , the base part 350 , and the partition wall part 310 are provided. A sealing region formed by removing the light conversion unit 300 may be formed, and a sealing material may be disposed in the sealing region to form the second sealing unit 520 .

Accordingly, the second sealing part 520 may be disposed in contact with the side surface of the second substrate 120 . In addition, the second sealing part 520 may be disposed in contact with a side surface of the second electrode 220 . In addition, the second sealing part 520 may be disposed in contact with the side surface of the buffer layer 420 . In addition, the second sealing part 520 may be disposed in contact with the side surface of the base part 350 . In addition, the second sealing part 520 may be disposed in contact with a side surface of the partition wall part 310 .

The second sealing part 520 is disposed on the side surface of the light path control member, that is, the side surface in the second direction 2A, so that impurities that can penetrate from the outside are inside the light conversion part 300 , that is, the light conversion part. It is possible to prevent the material 330 from penetrating into the receiving part 320 in which it is disposed.

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. 18 to 22 .

18 and 19 , the light path control member 1000 according to the embodiment may be disposed on or under 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 light path control member may be formed under the liquid crystal panel. That is, when the user-viewed side of the liquid crystal panel is defined as the upper portion of the liquid crystal panel, the light path control member may be disposed under the liquid crystal panel. In the display panel 2000, a first substrate 2100 including a thin film transistor (TFT) and a pixel electrode and a second substrate 2200 including color filter layers are bonded to each other with a liquid crystal layer interposed therebetween. It can be formed in a structured structure.

In addition, in the display panel 2000, a thin film transistor, a color filter, and a black electrolyte are formed on a first substrate 2100, and the second substrate 2200 has a liquid crystal layer interposed therebetween. It may be a liquid crystal display panel having a color filter on transistor (COT) structure that is bonded to the liquid crystal display panel. 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 3000 that provides light from a rear surface of the display panel 2000 .

That is, as shown in FIG. 18 , the light path control member is disposed below the liquid crystal panel and above the backlight unit 3000 , and the light path control member is disposed between the backlight unit 3000 and the display panel 2000 . can be placed in

Alternatively, when the display panel 2000 is an organic light emitting diode panel as shown in FIG. 19 , the light path control member may be formed on the organic light emitting diode panel. That is, when the surface viewed by the user of the organic light emitting diode panel is defined as the upper portion of the organic light emitting diode panel, the light path control member may be disposed on the organic light emitting diode 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 diode contacting 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 may be further included on the organic light emitting device.

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 diode 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 first substrate 110 of the light path control member. Although not shown in the drawings, the functional layer 1300 may be bonded to the first substrate 110 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 above 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, below the display panel or the display panel. It may be disposed in various positions, such as between the second substrate and the first substrate.

In addition, in the drawings, the light conversion unit of the light path control member according to the embodiment is shown in a direction parallel or perpendicular to the outer surface of the second substrate, but the light conversion unit is formed to be inclined at a predetermined angle from the outer surface of the second substrate. may be Accordingly, a moire phenomenon occurring between the display panel and the light path control member may be reduced.

20 to 22 , the light path control member according to the embodiment may be applied to various display devices.

20 to 22 , the light path control member according to the embodiment may be applied to a display device displaying a display.

For example, when power is applied to the light path controlling member as shown in FIG. 20 , the receiving unit functions as a light transmitting unit, so that the display device can be driven in the open mode, and power is supplied to the light path controlling member as shown in FIG. 21 . When not applied, the receiving unit functions as a light blocking unit, so that the display device may be driven in a light blocking mode.

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

The light emitted from the backlight unit or the self-luminous device may move from the first substrate to the second substrate. Alternatively, the light emitted from the backlight unit or the self-luminous device may also move from the second substrate to the first substrate.

Also, referring to FIG. 22 , the display device to which the light path control member according to the embodiment is applied may also be applied to the interior of a vehicle.

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

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

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

Features, structures, effects, etc. described in the above-described embodiments are included in at least one embodiment of the present invention, and are not necessarily limited to only one embodiment. Furthermore, features, structures, effects, etc. illustrated in each embodiment can be combined or modified for other embodiments by those of ordinary skill in the art to which the embodiments belong. Accordingly, the contents related to such combinations and modifications should be interpreted as being included in the scope of the present invention.

In addition, although the embodiments have been described above, these are merely examples and do not limit the present invention, and those of ordinary skill in the art to which the present invention pertains are exemplified above in a range that does not depart from the essential characteristics of the present embodiment. It can be seen that various modifications and applications that have not been made are possible. For example, each component specifically shown in the embodiments may be implemented by modification. And 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 (13)

a first substrate;
a first electrode disposed on the first substrate;
a second substrate disposed on the first substrate;
a second electrode disposed under the second substrate; and
and a light conversion unit disposed between the first electrode and the second electrode,
The light conversion unit includes a plurality of barrier rib portions, a plurality of accommodation portions and a base portion,
A light conversion material is disposed in the receiving portion,
a first sealing part sealing the light conversion material;
The first sealing portion extends from one end to the other end,
The other end of the first sealing part is an optical path control member disposed to extend to the inner region of the receiving part. The method of claim 1,
a sealing region formed by removing the second substrate and the second electrode;
The first sealing part is disposed to extend from the sealing area into the receiving part,
and the first sealing part includes a bent area between one end and the other end. The method of claim 1,
The light path control member including a 1-1 sealing part and a 1-2 sealing part, wherein the first sealing part faces each other. 3. The method of claim 2,
The first sealing portion includes a sealing material,
The first sealing portion is an optical path control member in contact with the inner surface of the receiving portion. 3. The method of claim 2,
The first sealing portion has a first length disposed in the sealing area; and a second length disposed inside the accommodating part,
The second length of the light path control member is 100㎛ to 2mm. 6. The method of claim 5,
and the second length is 50% or more of the first length. 7. The method of claim 6,
The length of the first sealing part is defined as the sum of the first length and the second length,
A maximum length deviation of the first sealing portion is 100 μm or less. 4. The method of claim 3,
The length of the 1-1 sealing part and the length of the 1-2 sealing part are different from each other. The method of claim 1,
and a mixing region disposed between the first sealing part and the light conversion material. The method of claim 1,
The bent area is an optical path control member that is bent in one length direction and the other length direction of the receiving part. a panel including at least one of a display panel and a touch panel; and
A display device comprising the light path control member of any one of claims 1 to 10 disposed on or under the panel. 12. The method of claim 11,
The panel includes a backlight unit and a liquid crystal display panel,
the light path control member is disposed between the backlight unit and the liquid crystal display panel;
The light emitted from the backlight unit moves from the first substrate to the second substrate. 12. The method of claim 11,
The panel includes an organic light emitting diode panel,
The light path control member is disposed on the organic light emitting diode panel,
The light emitted from the panel moves from the first substrate to the second substrate.

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