KR20220027474A - Light route control member and display having the same - Google Patents

Abstract

According to an embodiment of the present invention, an optical path control member includes: a first substrate; a first electrode disposed on the first substrate; a second substrate disposed on the first substrate; a second electrode disposed below the second substrate; and a light conversion unit disposed between the first electrode and the second electrode, wherein the light conversion unit includes a resin composition, the resin composition includes an oligomer, a monomer, and a photoinitiator, and the oligomer includes an oligomer having a pi bond. The light path control member may control the oligomer of the resin composition of the light conversion unit.

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 blocking 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 interior 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 transmission angle of light 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 including particles that can move according to the application of voltage and a dispersion liquid dispersing them inside the receiving unit, so that the receiving unit of the light converting unit blocks the light transmitting part and the light by dispersing and aggregating the particles It can be implemented by changing it to wealth.

On the other hand, such a light conversion part is formed by imprinting a photocurable resin, whereby the light conversion part may be formed with a base portion, a barrier rib portion and a receiving portion.

The photo-curable resin may include an additive for improving releasability or electrical properties. These additives may migrate on the surface of the resin, and thus the optical properties of the resin may deteriorate over time, and there is a problem in that the adhesion between the resin and the adhesive layer is reduced.

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

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

An optical path control member according to an embodiment includes: a first substrate; a first electrode disposed on the first substrate; a 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 comprises a resin composition, the resin composition comprising an oligomer, a monomer, and a photoinitiator, wherein the oligomer has a pi bond oligomers.

The light path control member according to the embodiment may control the oligomer of the resin composition of the light conversion unit.

In detail, the resin composition may include an oligomer including a pi bond. The oligomer according to the pi bond may facilitate the transfer of electric charge in the resin composition, and thus, the resin composition does not require a separate antistatic agent for transfer of electric charge.

Accordingly, it is possible to prevent film removal or floating of the resin composition due to sedimentation of the antistatic agent, thereby improving the reliability of the optical path control member.

In addition, since the oligomer having the pi bond facilitates the transfer of charges, the driving characteristics of the optical path control member can be maintained even when a separate antistatic agent is not added, and thus the driving characteristics of the optical path control member can be improved.

1 to 3 are views for explaining a manufacturing process of the light conversion unit of the light path control member according to the embodiment.
4 is a view for explaining a curing process of the resin composition of the light conversion unit according to the embodiment.
5 and 6 are cross-sectional views illustrating a light path control member according to an embodiment.
7 and 8 are cross-sectional views illustrating a display device to which a light path control member according to an exemplary embodiment is applied.
9 to 11 are views 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 a term 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 the present 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 under (below)" of each component, top (above) or under (below) is one as well as when two components are in direct contact with each other. Also includes a case in which the above another component 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.

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

First, the light conversion unit of the light path control member according to the embodiment will be described with reference to FIGS. 1 to 4 .

1 to 3 are views for explaining a process of manufacturing the light conversion unit of the light path control member according to the embodiment.

Referring to FIG. 1 , first, a mold member 10 including an intaglio portion E1 and an embossing portion E2 is prepared, and then the resin composition 20 is filled in the intaglio portion E1 of the mold member 10 . can do. The resin composition 20 may include a urethane-based resin composition.

As the resin composition is filled in the intaglio portion E1 of the mold member 10, the resin composition 20 fills the intaglio portion E1 while filling the intaglio portion E1 and the embossed portion E2. It may be disposed on the top.

Next, referring to FIG. 2 , the mold member 10 filled with the resin composition 20 and the substrate 30 on which the light conversion unit is disposed may be adhered. That is, the mold member 10 and the substrate 30 may be adhered to each other through the resin composition 20 disposed on the mold member 10 .

Next, referring to FIG. 3 , by releasing the mold member 10 , the light conversion part 300 including the resin composition on the substrate 30 and including the partition wall part 310 and the receiving part 320 . ) can be formed.

That is, as the mold member 10 is released, the light conversion unit 300 is formed on the substrate 30 , and the light conversion unit 300 includes the partition wall part 310 , the receiving part 320 and the It may include a base 350 .

When the adhesive properties of the resin composition 20 are lowered, the resin composition 20 and the substrate 30 may be completely or partially removed or lifted, thereby reducing the reliability and optical properties of the optical path control member.

The resin composition may include various additives of the resin composition. For example, an antistatic agent may be included for electrical properties of the resin composition. Such an antistatic agent may form a movement path of electric charges in the partition wall portion and the base portion, thereby facilitating the movement of electric charges moving in the direction of the receiving portion.

However, as the antistatic agent sinks toward the base, there is a problem in that the adhesion between the resin composition and the substrate is lowered.

Accordingly, the light path control member according to the embodiment attempts to solve the above problems by controlling the properties of the material forming the light conversion unit.

The light conversion unit according to the embodiment may include a resin composition. The resin composition may include an oligomer, a monomer, and a photopolymerization initiator. Alternatively, the resin composition may include an oligomer, a monomer, a photopolymerization initiator, and an additive. The resin composition may constitute a light conversion part by the reaction of the polymer-type prepolymer with the polyfunctional monomer serving as the diluent and the photopolymerization initiator.

That is, referring to FIG. 4 , the resin composition includes an oligomer, a monomer, a photopolymerization initiator, and an additive before curing, and a crosslinking structure network is formed by the reaction of the polymer, the monomer and the photopolymerization initiator by ultraviolet light to be cured. can

The resin composition may include a urethine acrylate polymer. For example, the oligomer may include urethane acrylate.

The oligomer may include an oligomer having a pi (π) bond. The oligomer may include an oligomer including an aromatic ring. For example, the oligomer may include an oligomer including a benzene ring. Specifically, the oligomer may include an oligomer having at least two benzene rings.

For example, the oligomer may include an oligomer such as an amine modified polyether acrylate or an aliphatic urethane acrylate.

The pi bond is a structure in which electrons are distributed below and above an axis between nuclei, and may facilitate the movement of charges.

Accordingly, the resin composition may not include a separate additive for facilitating charge transfer. That is, the resin composition does not contain an additive such as an antistatic agent. Accordingly, it is possible to prevent a phenomenon in which the light conversion unit formed of the resin composition by the antistatic agent is removed from the film or is lifted.

In addition, since the oligomer is cross-linked by the monomer and the photoinitiator, sinking of the oligomer may not occur.

Accordingly, the light path control member including the light conversion unit formed of the resin composition according to the embodiment may have improved reliability and optical properties.

The oligomer may include oligomers having different bonds. In detail, the oligomer may include a first oligomer and a second oligomer having different bonds.

For example, the oligomer may include a first oligomer having a pi (π) bond and a second oligomer having a sigma (σ) bond. Specifically, the oligomer may include a first oligomer including an aromatic ring and a second oligomer not including an aromatic ring. Specifically, the oligomer may include a first oligomer including a benzene ring and a second oligomer not including a benzene ring.

The second oligomer having the sigma bond may have a structure in which electron density is concentrated between nuclei along a linear axis between nuclei.

For example, the second oligomer may include an oligomer such as aromatic urethane acrylates and epoxy acrylates.

As described above, the first oligomer may serve to facilitate the transfer of charges in the light conversion unit formed by the resin composition.

The second oligomer may serve to improve the transmittance of the light conversion part formed of the resin composition.

The first oligomer and the second oligomer may be included in the same or different weight % ratio.

In detail, the first oligomer may be included in a proportion of 20 wt% to 99 wt% based on the total oligomer. In addition, the second oligomer may be included in an amount of 1 wt% to 80 wt% based on the total weight of the oligomer.

When the first oligomer is included in an amount of less than 20% by weight based on the total amount of the oligomer, charge transfer characteristics of the light conversion unit may be deteriorated. In addition, when the first oligomer is included in an amount exceeding 99% by weight based on the total weight of the oligomer, the light transmittance of the light conversion unit may decrease.

As the first oligomer and the second oligomer satisfy the above range, since an antistatic agent is not required in the optical path control member formed by the resin composition including the oligomers, the luminance in the open mode of the optical path control member is increased. can be improved

Alternatively, the first oligomer may be included in an amount of 1 wt% to 20 wt% based on the total oligomer. In addition, the second oligomer may be included in an amount of 80 wt% to 99 wt% based on the total weight of the oligomer.

Accordingly, as the first oligomer and the second oligomer satisfy the above range, the light shielding rate of the light path controlling member in the privacy mode in the light path controlling member formed of the resin composition including the oligomers is improved can do it

As the photoinitiator, a known photoinitiator for UV curing may be applied. In addition, the additive may include a material for improving releasability or electrical properties of the resin composition. For example, the additive may include a variety of materials including release additives and antistatic agents.

In addition, the monomer may include at least one monomer. In detail, the monomer may include a single monomer or a plurality of monomers. By changing the viscosity of the resin composition by mixing the monomers, it is possible to improve the release characteristics of the resin composition and the substrate.

The oligomers, monomers, photoinitiators and additives included in the resin composition may be included in different weight %, respectively.

In detail, the oligomer may be included in an amount of 40 wt% to 60 wt% based on the total weight of the resin composition.

In addition, the monomer may be included in an amount of 30% to 40% by weight based on the total weight of the resin composition.

In addition, the photoinitiator may be included in an amount of 0.1 wt% to 5 wt% based on the total weight of the resin composition.

Hereinafter, a light path control member including the above-described light conversion unit will be described in detail with reference to FIGS. 5 and 6 .

5 and 6 , the light conversion unit 300 may include a partition wall unit 310 and a receiving unit 320 . The light conversion unit 300 may be formed using the above-described resin composition.

The barrier rib portion 310 may be defined as a barrier rib region that partitions the receiving portion. 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 accommodating 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 in contact with the second electrode 220 , and the partition wall part 310 may be disposed under the base part 350 .

The thickness T1 of the base part 350 and the thickness T2 of the partition wall part 310 may be different from each other. In detail, the thickness T1 of the base part 350 may be smaller than the thickness T2 of the partition wall part 310 .

For example, the thickness T1 of the base part 350 may be 10 μm or less. In detail, the thickness T1 of the base part 350 may be 1 μm to 10 μm. In more detail, the thickness T1 of the base part 350 may be 3 μm to 8 μm. In more detail, the thickness T1 of the base part 350 may be 5 μm to 7 μm.

When the thickness T1 of the base part 350 exceeds 10 μm, the distance between the second electrode 220 and the accommodation part 320 may increase. That is, the distance between the accommodating part 320 including the light conversion material and the second electrode 220 may increase. Accordingly, due to the high resistance of the base part 350 and the second electrode 220 to the accommodating part 320 including the light conversion material, the transfer characteristic of the electric charge is reduced, so that the driving characteristic of the optical path control member is lowered. can be

In addition, when the thickness T1 of the base part 350 is less than 1 μm, it is difficult to implement in the imprinting process, and thus process efficiency may be reduced.

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 to extend in a direction from the first electrode 210 to the second electrode 220 and to have a narrower 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 of the accommodating portions 320 may be disposed between the adjacent partition wall portions 310 .

Also, the plurality of partition wall portions 310 may be formed to have a uniform thickness. In detail, the thickness deviation of the plurality of partition wall portions 310 may be 10% or less. In more detail, the thickness deviation of the plurality of partition wall portions 310 may be 5% to 10%. In more detail, the thickness deviation of the plurality of partition wall portions 310 may be 7% to 9%.

In the light path control member according to the embodiment, since the barrier rib portion is formed by the above-described resin composition, thickness variations of the plurality of barrier rib portions may be minimized.

When the thickness deviation of the plurality of barrier rib portions 310 exceeds 10%, a cross-sectional area difference between the accommodating portions between the barrier rib portions 310 occurs, and the light conversion material is filled in the accommodating portion due to the cross-sectional area difference , since a deviation may occur as filling characteristics of the light conversion material are different in the plurality of accommodating units, optical characteristics of the light path controlling member may be deteriorated.

Also, the plurality of partition wall portions 310 may be formed to have a uniform width. In detail, the width deviation of the plurality of partition wall portions 310 may be 10% or less. In detail, the width deviation of the plurality of partition walls 310 may be 3% to 10%. In more detail, the width deviation of the plurality of partition wall portions 310 may be 5% to 8%.

In the light path control member according to the embodiment, since the barrier rib portion is formed of the above-described resin composition, a deviation in width of the plurality of barrier rib portions may be minimized.

When the width deviation of the plurality of barrier rib portions 310 exceeds 10%, a cross-sectional area difference between the accommodating portions between the barrier rib portions 310 occurs, and a light conversion material is filled in the accommodating portion due to the cross-sectional area difference , since a deviation may occur as filling characteristics of the light conversion material are different in the plurality of accommodating units, optical characteristics of the light path controlling member may be deteriorated.

The barrier rib part 310 may include a transparent material. The barrier rib part 310 may include a material that can transmit light. That is, the barrier rib part 310 may include the transparent resin composition described above. For example, the partition wall part 310 may include a transparent urethane acrylate polymer.

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 liquid 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 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 transmissive 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 accommodating part 320 may be driven as a light blocking part.

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. 5 , the light conversion particle 330a is 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. 6 , 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 move 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.

Hereinafter, the present invention will be described in more detail through the light transmittance according to the oligomer of the resin composition forming the light conversion part of the light path control member according to Examples and Comparative Examples. These embodiments are merely presented as examples in order to explain the present invention in more detail. Therefore, the present invention is not limited to these examples.

Example 1

A resin composition was formed by mixing an oligomer including urethane acrylate, a monomer, and a photoinitiator.

In this case, the oligomer contained at least one pi bond.

Then, after preparing a mold member including the intaglio part and the embossed part, the resin composition was filled in the intaglio part of the mold member.

Accordingly, after forming a first electrode including indium tin oxide on a first substrate including polyethylene terephthalate (PET), the first electrode and the mold member were adhered.

Then, the mold member and the resin composition were released to form a base portion, an embossed barrier rib portion, and an intaglio-shaped accommodation portion on the substrate, and a light conversion material was filled in the accommodation portion to form a light conversion portion.

Next, after forming a second electrode including indium tin oxide on the lower portion of the second substrate including polyethylene terephthalate (PET), the second electrode and the light conversion unit were adhered.

Then, light transmittance from the first substrate to the second substrate was measured to measure the light transmittance at 45° left and right according to the voltage application.

Example 2

An optical path control member was formed in the same manner as in Example 1, except that 80% of the oligomer having a pi bond was included in the total oligomer and 20% of the oligomer having a sigma bond was included in the total oligomer.

Then, light transmittance from the first substrate to the second substrate was measured to measure the light transmittance at 45° left and right according to the voltage application.

Example 3

An optical path control member was formed in the same manner as in Example 1, except that 20% of the oligomer having a pi bond was included in the total oligomer and 80% of the oligomer having a sigma bond was included in the total oligomer.

Then, light transmittance from the first substrate to the second substrate was measured to measure the light transmittance at 45° left and right according to the voltage application.

Comparative Example 1

An optical path controlling member was formed in the same manner as in Example 1, except that the oligomer did not include a pi bond but a sigma bond.

Then, light transmittance from the first substrate to the second substrate was measured to measure the light transmittance at 45° left and right according to the voltage application.

Undriven light transmittance (%) Voltage applied light transmittance (%) Example 1 8-9 40-43 Comparative Example 1 2-3 10-21

Undriven light transmittance (%) Voltage applied light transmittance (%) Example 1 8-9 40-43 Example 2 5-6 38-40 Example 3 4-5 35-38

sigma-linked oligomers pi-linked oligomers Voltage applied light transmittance (%) 0 100% by weight 200% 20% by weight 80% by weight 190% 80% by weight 20% by weight 179% 100% by weight 0 100%

Referring to Table 1, it can be seen that the light transmittance of the light path controlling member according to Example 1 is increased when a voltage is applied to the light path controlling member. That is, it can be seen that the light transmittance is increased when the voltage is applied to drive the light path control member in the open mode.

Accordingly, it can be seen that the optical path control member according to Example 1 can improve the driving characteristics and luminance of the optical path control member by facilitating the transfer of charges by the oligomer of the resin composition without using a separate additive. there is.

Also, referring to Table 2, it can be seen that the light transmittance of the light path control members according to Examples 2 and 3 is reduced in a non-driven state to which no voltage is applied.

Accordingly, it can be seen that the shielding effect can be improved by reducing the light transmittance in the privacy mode of the light path control member.

Also, referring to Table 3, it can be seen that the relative transmittance of the light path control member is increased as compared to the resin composition including only the oligomer having sigma bonds as the oligomer having a pi bond is included.

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. 7 to 11 .

7 and 8 , 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 below 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. 7 , 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, as shown in FIG. 8 , when the display panel 2000 is an organic light emitting diode panel, 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 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 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, 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.

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.

9 to 11 , the light path control member according to the embodiment may be applied to various display devices.

9 to 11 , 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. 9 , 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. 10 . 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 apparatus 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. 11 , the display device to which the light path control member according to the embodiment is applied may also be applied to the interior of a vehicle.

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

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

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

Features, structures, effects, etc. described in the above-described embodiments are included in at least one embodiment of the present invention, and are not necessarily limited to one embodiment. Furthermore, the 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 (8)

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 resin composition,
The resin composition comprises an oligomer, a monomer and a photoinitiator,
The oligomer includes an oligomer having a pi bond. The method of claim 1,
The oligomer is an optical path control member comprising at least one aromatic ring. The method of claim 1,
The oligomer is an optical path control member comprising at least one benzene ring. The method of claim 1,
The oligomer includes a first oligomer having a pi bond and a second oligomer having a sigma bond. 5. The method of claim 4,
The first oligomer is included in an amount of 10 wt% to 90 wt% based on the total weight of the oligomer. 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 5 disposed on or under the panel. 7. The method of claim 6,
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. 7. The method of claim 6,
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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