Optical path control member and display device including the same

Abstract

According to one embodiment, an optical path control member includes: a first substrate; a first electrode disposed above the first substrate; a second substrate disposed above 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, wherein the resin composition includes an oligomer, a monomer, a photoinitiator, and an additive, wherein the monomer has a molecular weight of 600 g / mol or less.

Description

Technical Field

[0001] The embodiments relate to an optical path control component, and to a display device including the optical path control component. Background Technology

[0002] The light-blocking film blocks the transmission of light from the light source and is attached to the front surface of the display panel of mobile phones, laptops, tablets, vehicle navigation devices, vehicle touch display devices, etc., so that when the display is transmitted through the screen, the light-blocking film adjusts the angle of light according to the angle of light incidence, thereby displaying clear image quality at the user's desired viewing angle.

[0003] In addition, shading film can be used on windows of vehicles, buildings, etc. to partially block external light to prevent glare or to prevent the interior from being seen from the outside.

[0004] In other words, a light-blocking film can be a light path control component that controls the movement path of light to block light in a specific direction and transmit light in a specific direction. Therefore, the user's viewing angle can be controlled by controlling the transmission angle of light through the light-blocking film.

[0005] Meanwhile, this type of light-blocking film can be divided into light-blocking films that can always control the viewing angle regardless of the surrounding environment or the user's environment, and switchable light-blocking films that allow the user to open / close the viewing angle control according to the surrounding environment or the user's environment.

[0006] This switchable light-blocking film can be achieved by filling the receiving part with a light-converting material comprising particles that can move when a voltage is applied and a dispersion liquid for dispersing the particles, and by dispersing and aggregating the particles, thereby converting the patterned part into a light-transmitting part and a light-blocking part.

[0007] Meanwhile, the light conversion unit is formed by imprinting a photocurable resin, thus forming the base, barrier rib, and receiving portion in the light conversion unit. At this time, when forming the partition wall and receiving portion, the shape and height of the partition wall may become inconsistent due to demolding defects, and therefore the width and height of the receiving portion between the partition wall portions may also become inconsistent.

[0008] Furthermore, as the height of the base increases, the resistance between the housing and the electrode increases, which may reduce the driving characteristics of the switchable light-shielding film.

[0009] Therefore, there is a need for optical path control components with new structures that can solve the above problems. Summary of the Invention

[0010] Technical issues

[0011] The embodiments relate to an optical path control component with improved drive speed.

[0012] Technical solution

[0013] An optical path control component according to one embodiment includes: a first substrate; a first electrode disposed above the first substrate; a second substrate disposed above 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, wherein the resin composition includes an oligomer, a monomer, a photoinitiator, and an additive, wherein the molecular weight of the monomer is less than 600 g / mol.

[0014] Beneficial effects

[0015] According to the embodiment, the optical path control component can control the molecular weight and viscosity of the resin composition of the light conversion unit.

[0016] Therefore, the thickness of the base of the light conversion unit can be reduced, and the shape of the base can be formed uniformly.

[0017] Specifically, since the resin composition includes at least one monomer with a molecular weight of less than 600 g / mol, the cross-linking structure of the resin composition can be made denser, thereby increasing the cross-linking density of the resin composition. Therefore, the filling properties of the resin composition can be improved, and the thickness of the base of the light conversion unit can be reduced.

[0018] Therefore, since the thickness of the base is reduced and the distance between the electrode and the housing is reduced, charge movement can be promoted, thereby improving the driving characteristics of the optical path control component.

[0019] In addition, the resin composition can have a viscosity of less than 400 cPs.

[0020] Therefore, since the release properties between the resin composition and the mold component can be improved, the variation in the width and thickness of the base of the optical path control component can be minimized.

[0021] Therefore, since the shapes of the partition walls are consistent, and the shapes of the receptacles between the partition walls are also consistent, the capillary characteristics when the light conversion material is injected into the receptacles can be improved.

[0022] Furthermore, according to the embodiment, the optical path control component can improve the driving speed and driving characteristics of the optical path control component by increasing the moving speed of the optical conversion particles.

[0023] In other words, since the resin composition forming the partition wall and / or base includes monomers with highly electronegative bonding groups, the partition wall and / or base can contain multiple negative charges, thus enhancing the polarity of the partition wall and / or base.

[0024] Therefore, by moving the positively charged dispersant in the light conversion material in the direction of the separating wall portion and / or the base portion, the movement of the light conversion particles can be promoted. Furthermore, since the positively charged dispersant binds to the light conversion particles, preventing the reduction of the negative charge of the light conversion particles, the movement speed of the light conversion particles can be increased.

[0025] Therefore, the optical path control component according to the embodiment can have improved driving speed and driving characteristics. Attached Figure Description

[0026] Figures 1 to 3 This is a view used to illustrate the manufacturing process of the light conversion unit of the light path control component according to an embodiment.

[0027] Figure 4 This is a view used to illustrate the curing process of the resin composition of the light conversion unit according to an embodiment.

[0028] Figure 5 and Figure 6 This is a cross-sectional view of the optical path control component according to an embodiment.

[0029] Figure 7 and Figure 8 This is a view used to illustrate the base of the light conversion unit according to the embodiments and comparative examples.

[0030] Figure 9 and Figure 10 This is a view used to illustrate the shape of the light conversion unit according to the embodiments and comparative examples.

[0031] Figure 11 and Figure 12 This is an enlarged view of a region of the optical conversion unit of the optical path control component according to an embodiment.

[0032] Figure 13 It is a view based on the polarity intensity of the bonding type.

[0033] Figure 14 This is a graph showing the XPS analysis results of the light conversion unit according to the embodiments and comparative examples.

[0034] Figure 15 It is a graph used to illustrate the driving speed of the optical path control component according to the embodiments and comparative examples.

[0035] Figure 16 and Figure 17 This is a cross-sectional view of a display device that utilizes the optical path control component according to an embodiment.

[0036] Figures 18 to 20 This is a view illustrating one embodiment of a display device to explain the application of the optical path control component of the embodiment. Detailed Implementation

[0037] In the following description, embodiments of the invention will be specifically described with reference to the accompanying drawings. However, the spirit and scope of the invention are not limited to the portion of the described embodiments, and it may be implemented in various other forms. Furthermore, one or more elements of the embodiments may be selectively combined and substituted within the spirit and scope of the invention.

[0038] Furthermore, unless otherwise explicitly defined and described, the terms (including technical and scientific terms) used in the embodiments of the present invention may be interpreted as having the same meaning as commonly understood by one of ordinary skill in the art to which the present invention pertains, and terms defined, for example, in a common dictionary may be interpreted as having a meaning consistent with their meaning in the context of the relevant art.

[0039] Furthermore, the terminology used in the embodiments of the present invention is for describing the embodiments and is not intended to limit the invention. In this specification, unless specifically stated in the wording, the singular form may also include the plural form, and when described as "at least one (or more) of A, B, and C", it may include at least one of all combinations that can be combined among A, B, and C.

[0040] Furthermore, when describing the elements of embodiments of the present invention, terms such as first, second, A, B, (a), and (b) may be used. These terms are used only to distinguish elements from other elements, and they do not limit the nature, order, or sequence of the elements.

[0041] In addition, when an element is described as being “connected” or “combined” to another element, it can include not only cases where the element is directly “connected” or “combined” to other elements, but also cases where the element is “connected,” “coupled,” or “combined” to another element through which the element is connected to other elements.

[0042] Furthermore, when described as being formed or set “above” or “below” each element, “above” or “below” can include not only cases where two elements are directly connected to each other, but also cases where one or more other elements are formed or set between two elements.

[0043] Furthermore, when expressed as "up" or "down", it can include not only the upward direction based on a single element, but also the downward direction based on a single element.

[0044] In the following description, the optical path control component according to an embodiment will be described with reference to the accompanying drawings.

[0045] First, refer to Figures 1 to 4 Describes the optical conversion unit of the optical path control component according to an embodiment.

[0046] Figures 1 to 3 This is a view used to illustrate the manufacturing process of the light conversion unit of the light path control component according to an embodiment.

[0047] Reference Figure 1 After preparing the mold component 10, which includes the recessed portion E1 and the relief portion E2, the resin composition 20 can be filled into the recessed portion E1 of the mold component 10. The resin composition 20 may include a polyurethane resin composition.

[0048] Since the resin composition 20 is filled in the recessed portion E1 of the mold component 10, the resin composition 20 can be disposed on the upper part of the recessed portion E1 and the relief portion E2 at the same time as filling the recessed portion E1.

[0049] Subsequently, referring to Figure 2 The mold component 10 filled with resin composition 20 and the substrate 30 on which the light conversion unit is disposed can be combined. That is, the mold component 10 and the substrate 30 can be bonded to each other by the resin composition 20 disposed on the mold component 10.

[0050] Subsequently, referring to Figure 3 The mold component 10 is demolded, so that a light conversion unit 300 comprising a resin composition and including a partition wall portion 310 and a receiving portion 320 can be formed on the substrate 30.

[0051] In other words, the light conversion unit 300 is formed on the substrate 30 by demolding the mold component 10, and the light conversion unit 300 may include a partition wall portion 310, a receiving portion 320 and a base portion 350.

[0052] In this situation, when the release properties of the mold component 10 and the resin composition 20 decrease, the shape and size of the partition wall portion 310 and the receiving portion 320 may become inconsistent when the mold component 10 and the resin composition 20 are demolded. Therefore, the brightness uniformity of the light path control component may decrease, and injection failure may occur when the light conversion material is injected into the receiving portion 320 due to the different filling speed of each receiving portion.

[0053] Furthermore, when the thickness of the base 350 increases, the distance between the accommodating portion and the electrode increases, thereby increasing the resistance and reducing the driving speed of the light conversion particles in the accommodating portion, which may reduce the driving characteristics of the optical path control component.

[0054] Therefore, the optical path control component according to the embodiment solves the above-mentioned problems by controlling the properties of the material forming the optical conversion unit.

[0055] The light conversion unit according to an embodiment may include a resin composition. The resin composition may include oligomers, monomers, and a photoinitiator. Alternatively, the resin composition may include oligomers, monomers, a photoinitiator, and additives. The resin composition may constitute the light conversion unit through a reaction between a prepolymer in polymer form, a multifunctional monomer as a diluent, and a photoinitiator.

[0056] In other words, referencing Figure 4 Prior to curing, the resin composition includes oligomers, monomers, photoinitiators, and additives, and the resin composition can be cured by ultraviolet light while forming a cross-linked network through the reaction of polymers, monomers, and photoinitiators.

[0057] The resin composition may include urethane acrylate polymers. For example, oligomers may include urethane acrylates.

[0058] In addition, known photoinitiators for UV curing can be used as photoinitiators. Furthermore, additives may include materials used to improve the release properties or electrical properties of the resin composition. For example, additives may include a variety of materials, including release additives and antistatic agents.

[0059] Furthermore, the monomer may include low molecular weight monomers. Specifically, the monomer may have a molecular weight of less than 600 g / mol. More specifically, the monomer may have a molecular weight of 100 g / mol to 600 g / mol. More specifically, the monomer may have a molecular weight of 200 g / mol to 500 g / mol. More specifically, the monomer may have a molecular weight of 300 g / mol to 400 g / mol.

[0060] The molecular weight of the monomer can be related to the crosslinking density of the resin composition after curing. As the molecular weight of the monomer decreases, the polymer chain length shortens and shrinks, thereby increasing the crosslinking density.

[0061] Therefore, when filling the recessed portion of the mold component with the resin composition, the filling characteristics can be improved and the thickness of the base provided above the mold component can be reduced.

[0062] When the molecular weight of the monomer exceeds 600 g / mol, the crosslinking density of the resin composition decreases, which may increase the thickness of the base on the mold component when the resin composition is filled into the mold component.

[0063] The monomer may include various monomers having a molecular weight of less than 600 g / mol. For example, the monomer may include at least one of HEA, BMA, 2-PEA, CTFA, IBOA, EOEOEA, IDA, TPGDA, TCDDMDA, BPA3EODA, and BPA4EODA. For example, the monomer may include at least two monomers having a molecular weight of less than 600 g / mol.

[0064] Since the resin composition includes monomers with a molecular weight of less than 600 g / mol, the thickness of the base of the light conversion unit formed by the resin composition can be reduced.

[0065] Simultaneously, the resin composition can have low viscosity. Low viscosity of the resin composition can be achieved by using monomers with low molecular weight.

[0066] The resin composition can have a viscosity of less than 400 cPs. Specifically, the resin composition can have a viscosity of 200 cPs to 400 cPs. More specifically, the resin composition can have a viscosity of 250 cPs to 350 cPs. More specifically, the resin composition can have a viscosity of 280 cPs to 330 cPs.

[0067] When the viscosity of the resin composition exceeds 400 cPs, the release properties between the resin composition and the mold components may decrease. Therefore, when the mold components are demolded from the resin composition, the partition walls of the light conversion unit may be damaged, potentially resulting in defects.

[0068] Furthermore, when the mold components are demolded from the resin composition, differences in height and width between the partition walls may occur, which may in turn lead to differences in the height and width of the receiving portions provided between the partition walls.

[0069] Therefore, when the light conversion material is injected into the reservoir via a capillary action, the difference in cross-sectional area due to variations in the reservoir's cross-sectional area results in differences in the capillary effect. Consequently, due to the different filling rates in each reservoir, insufficient filling of the light conversion material may occur.

[0070] Furthermore, the monomer can include multiple monomers. Specifically, the monomer can include a first monomer and a second monomer with different molecular weights. For example, the first monomer can have a molecular weight of less than 600 g / mol, and the second monomer can have a molecular weight of greater than 600 g / mol.

[0071] The first and second monomers can be included in different proportions relative to the total monomers. Specifically, a greater proportion of the second monomers with relatively large molecular weights may be included compared to the first monomers, which have relatively small molecular weights.

[0072] For example, the ratio of the first monomer to the second monomer can be from 1:3 to 2:3. Therefore, the crosslinking density of the resin composition can be increased by the first monomer, and the strength of the resin composition can be increased by the second monomer, thereby improving the properties of the partition walls and the base formed by the resin composition.

[0073] The oligomers, monomers, photoinitiators and additives included in the resin composition may be included in different weight percentages.

[0074] Specifically, based on the total weight of the resin composition, the content of oligomers can be from 40% to 60% by weight.

[0075] Furthermore, the monomer content can be from 30% to 40% by weight, based on the total weight of the resin composition.

[0076] Furthermore, the content of photoinitiator can be from 0.1% to 5% by weight, based on the total weight of the resin composition.

[0077] Furthermore, the content of additives can be from 0.1% by weight to 5% by weight, based on the total weight of the resin composition.

[0078] In the following text, reference will be made to Figure 5 and Figure 6 The specific description includes the optical path control components of the aforementioned optical conversion unit.

[0079] Reference Figure 5 and Figure 6 The light conversion unit 300 may include a partition wall portion 310 and a receiving portion 320. The light conversion unit 300 may be formed using the above-described resin composition.

[0080] The partition wall portion 310 can be defined as a barrier rib region that divides the receiving portions. That is, the partition wall portion 310 is a barrier rib region that divides multiple receiving portions and can transmit light. In other words, light emitted in the direction of the first substrate 110 or the second substrate 120 can pass through the partition wall portion.

[0081] The receiving portion 320 can be formed to partially pass through the light conversion unit 300. Therefore, the receiving portion 320 can contact the adhesive layer 410 and be spaced apart from the buffer layer 420. Therefore, the base portion 350 can be formed between the receiving portion 320 and the buffer layer 420.

[0082] The base 350 may be disposed on the partition wall portion 310. Specifically, the base 350 may be configured to contact the second electrode 220, and the partition wall portion 310 may be disposed below the base 350.

[0083] The thickness T1 of the base 350 and the thickness T2 of the partition wall 310 can be different from each other. Specifically, the thickness T1 of the base 350 can be less than the thickness T2 of the partition wall 310.

[0084] For example, the thickness T1 of the base 350 can be less than 10 μm. Specifically, the thickness T1 of the base 350 can be from 1 μm to 10 μm. More specifically, the thickness T1 of the base 350 can be from 3 μm to 8 μm. More specifically, the thickness T1 of the base 350 can be from 5 μm to 7 μm.

[0085] When the thickness T1 of the base 350 exceeds 10 μm, the distance between the second electrode 220 and the receiving portion 320 increases. That is, the distance between the receiving portion 320, which includes the light conversion material, and the second electrode 220 increases. Therefore, the movement characteristics of the charge that moves through the second electrode 220 to the receiving portion 320, which includes the light conversion material, are reduced due to the high resistance of the base 350, and thus, the driving characteristics of the optical path control component may decrease.

[0086] Furthermore, the process efficiency may be reduced because it is difficult to achieve a thickness T1 of less than 1 μm for the base 350 in the imprinting process.

[0087] The partition wall portion 310 and the receiving portion 320 may be configured to extend in a second direction of the first substrate 110 and the second substrate 120. That is, the partition wall portion 310 and the receiving portion 320 may extend in the width direction or the length direction of the first substrate 110 and the second substrate 120.

[0088] The partition wall portion 310 and the receiving portion 320 can be configured to have different widths. For example, the width of the partition wall portion 310 can be greater than the width of the receiving portion 320.

[0089] Furthermore, the receiving portion 320 can be formed in a shape where the width narrows as it extends from the first electrode 210 toward the second electrode 220.

[0090] The partition wall portion 310 and the receiving portion 320 can be arranged alternately. Specifically, the partition wall portion 310 and the receiving portion 320 can be arranged alternately. That is, each partition wall portion 310 can be arranged between adjacent receiving portions 320, and each receiving portion 320 can be arranged between adjacent partition wall portions 310.

[0091] Furthermore, the plurality of partition wall portions 310 can be formed to have a uniform thickness. Specifically, the thickness deviation of the plurality of partition wall portions 310 can be less than 10%. More specifically, the thickness deviation of the plurality of partition wall portions 310 can be from 5% to 10%. More specifically, the thickness deviation of the plurality of partition wall portions 310 can be from 7% to 9%.

[0092] Since the optical path control component according to the embodiment uses the above-described resin composition to form the partition wall portion, the thickness deviation of the plurality of partition walls portion can be minimized.

[0093] When the thickness deviation of the multiple partition walls 310 exceeds 10%, the cross-sectional area of ​​the receiving portion between the partition walls may differ, and when the light conversion material is filled in the receiving portion, the filling characteristics of the light conversion material in the multiple receiving portions may differ due to the difference in cross-sectional area. Therefore, the light conversion material may deviate, which may reduce the optical properties of the optical path control component.

[0094] Furthermore, the plurality of partition wall portions 310 can be formed to have a uniform width. Specifically, the width deviation of the plurality of partition wall portions 310 can be less than 10%. More specifically, the width deviation of the plurality of partition wall portions 310 can be from 3% to 10%. More specifically, the width deviation of the plurality of partition wall portions 310 can be from 5% to 8%.

[0095] Since the optical path control component according to the embodiment uses the above-described resin composition to form the partition wall portion, the width deviation of the plurality of partition walls portion can be minimized.

[0096] When the width deviation of multiple partition walls 310 exceeds 10%, the cross-sectional area of ​​the receiving portion between the partition walls may differ, and when the light conversion material is filled in the receiving portion, the filling characteristics of the light conversion material in multiple receiving portions may differ due to the difference in cross-sectional area. Therefore, the light conversion material may deviate, which may reduce the optical characteristics of the optical path control component.

[0097] The partition wall portion 310 may include a transparent material. The partition wall portion 310 may include a material capable of transmitting light. That is, the partition wall portion 310 may include the aforementioned transparent resin composition. For example, the partition wall portion 310 may include a transparent polyurethane acrylate polymer.

[0098] A light conversion material 330, including light conversion particles 330b and a dispersion 330a in which the light conversion particles 330b are dispersed, can be disposed in a receiving portion 320.

[0099] Dispersion 330a can be a material that disperses light-converting particles 330b. Dispersion 330a can contain a transparent material. Dispersion 330a can contain a non-polar solvent. Furthermore, dispersion 330a can contain a material capable of transmitting light.

[0100] The light conversion particles 330b can be dispersed in the dispersion 330a. Specifically, multiple light conversion particles 330b can be spaced apart from each other in the dispersion 330a.

[0101] The light conversion particle 330b may contain a material capable of absorbing light. That is, the light conversion particle 330b may be a light-absorbing particle. The light conversion particle 330b may have a color. For example, the light conversion particle 330b may have a black-based color. For example, the light conversion particle 330b may contain carbon black particles.

[0102] The surface of the light-converting particle 330b can be charged and can be polarized. For example, the surface of the light-converting particle 330b can be negatively charged. Therefore, by applying a voltage, the light-converting particle 330b can move toward the first electrode 210 or the second electrode 220.

[0103] The light conversion particles 330b can change the light transmittance of the container 320. Specifically, by changing the light transmittance of the light conversion particles 330b, the container 320 can become both a light-blocking and a light-transmitting part. In other words, the transmittance of light passing through the container 320 can be changed by the dispersion and aggregation of the light conversion particles 330b disposed in the dispersion liquid 330a.

[0104] For example, the mode of the optical path component according to the first embodiment can be changed from a first mode to a second mode or from a second mode to a first mode by applying a voltage to the first electrode 210 and the second electrode 220.

[0105] Specifically, in the optical path control member according to the embodiment, the receiving portion 320 becomes a light-shielding portion in the first mode, and light at a specific angle can be blocked by the receiving portion 320. That is, the viewing angle of the user from the outside is narrowed, thereby allowing the optical path control member to be driven in a privacy mode.

[0106] Furthermore, in the optical path control member according to the embodiment, the receiving portion 320 becomes a light-transmitting portion in the second mode, and light can pass through both the partition wall portion 310 and the receiving portion 320 simultaneously. That is, the user's viewing angle from the outside is widened, thereby allowing the optical path control member to be driven in an open mode.

[0107] The transition from the first mode to the second mode can be achieved by moving the light-converting particles 330b in the receiving portion 320; that is, the receiving portion 320 can be transitioned from a light-blocking portion to a light-transmitting portion. In other words, the surface of the light-converting particles 330b carries a charge, and when a voltage is applied, the light-converting particles 330b can move towards the first electrode or the second electrode according to the characteristics of the charge. In other words, the light-converting particles 330b can be electrophoretic particles.

[0108] For example, when no voltage is applied to the optical path control member from the outside, the light conversion particles 330b of the receiving portion 320 are uniformly dispersed in the dispersion liquid 330a, so the receiving portion 320 can block light through the light conversion particles 330b. Therefore, in the first mode, the receiving portion 320 can be driven as a light-blocking portion.

[0109] Furthermore, the light conversion particle 330b can be moved when a voltage is applied to the optical path control member from the outside. For example, the light conversion particle 330b can be moved toward one end or the other end of the receiving portion 320 by the voltage transmitted by the first electrode 210 and the second electrode 220. That is, the light conversion particle 330b can move toward the first electrode 210 or the second electrode 220.

[0110] 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 330b can move along the direction of the positive electrode in the electrodes 210 and 220 using the dispersion liquid 330a as a medium.

[0111] For example, refer to Figure 5 In the initial mode or when no voltage is applied to the first electrode 210 and / or the second electrode 220, the light conversion particles 330b can be uniformly dispersed in the dispersion liquid 330a, and the receiving part 320 can be driven as a light-shielding part.

[0112] In addition, refer to Figure 6 When a voltage is applied to the first electrode 210 and / or the second electrode 220, the light-converting particles 330b can move in the dispersion 330a along the direction of the second electrode 220. That is, the light-converting particles 330b can move in one direction, and the receiving portion 320 can be driven to become a light-transmitting portion.

[0113] Therefore, depending on the user's surrounding environment, the optical path control member according to the embodiment can be driven in two modes. That is, when the user needs to transmit light only from a specific viewing angle, the receiving part is driven as a light-shielding part, or when the user needs a high-brightness environment, a voltage can be applied to drive the receiving part as a light-shielding part.

[0114] Therefore, since the optical path control component according to the embodiment can be implemented in two modes according to the user's needs, the optical path control component can be applied regardless of the user's environment.

[0115] In the following description, the invention will be described in more detail with reference to the molecular weight and viscosity of the resin composition forming the light conversion unit of the light path control member according to the embodiments and comparative examples, and with reference to the shape of the partition wall portion and the base portion. These embodiments are presented by way of example only in order to illustrate the invention more specifically. Therefore, the invention is not limited to these embodiments.

[0116] Example 1

[0117] A resin composition is formed by mixing oligomers including urethane acrylates, monomers, photoinitiators, and antistatic agents.

[0118] At this time, monomers with a molecular weight of less than 600 g / mol are used as monomers. Specifically, the monomers include at least one of HEA, BMA, 2-PEA, CTFA, IBOA, EOEOEA, IDA, TPGDA, TCDDMDA, BPA3EODA, and BPA4EODA.

[0119] Subsequently, after preparing a mold component including a recessed portion and an embossed portion, a resin composition is filled into the recessed portion of the mold component.

[0120] Subsequently, the mold component and the polyethylene terephthalate substrate are bonded together. Then, after the mold component and the resin composition are demolded, a base, an embossed partition wall, and an intaglio receiving portion are formed on the substrate to form a light conversion unit.

[0121] Then, measure the thickness range of the base.

[0122] Comparative Example 1

[0123] Except for using monomers with a molecular weight greater than 600 g / mol, the light conversion units were formed in the same manner as in Example 1. Specifically, the monomers included at least one of TMP9EOTA and BPA10EODMA with a molecular weight greater than 600 g / mol.

[0124] Then, measure the thickness range of the base.

[0125] [Table 1]

[0126] Example 1 Comparative Example 1 Base thickness (μm) 1～10 15～30

[0127] Figure 7 This is a view showing the light conversion unit according to Embodiment 1. Figure 8 This is a view showing the light conversion unit according to Comparative Example 1.

[0128] Refer to Table 1 and Figure 7 and Figure 8 It can be seen that the thickness of the base of the light conversion unit according to Example 1 is less than the thickness of the base according to Comparative Example 1.

[0129] In other words, the base of the light conversion unit according to Example 1 has a dense cross-linked structure because the resin composition includes monomers with low molecular weight. Therefore, it can be seen that the thickness of the base can be reduced by increasing the cross-linking density of the resin composition.

[0130] Example 2

[0131] Except that the viscosity of the light conversion unit is below 400 cPs, the light conversion unit is formed in the same manner as in Example 1.

[0132] Then, observe the shape of the base.

[0133] Comparative Example 2

[0134] Except that the viscosity of the light conversion unit exceeds 400 cPs, the light conversion unit is formed in the same manner as in Comparative Example 1.

[0135] Then, observe the shape of the base.

[0136] Figure 9 This is a view showing the light conversion unit according to Embodiment 2. Figure 10 This is a view showing the light conversion unit according to Comparative Example 2.

[0137] Reference Figure 9 and Figure 10 It can be seen that the partition walls of the light conversion unit according to Embodiment 2 have a consistent shape. That is, it can be seen that the partition walls of the light conversion unit according to Embodiment 2 have a consistent width and height.

[0138] On the other hand, it can be seen that the shape of the partition wall portion of the light conversion unit according to Comparative Example 2 is inconsistent. That is, it can be seen that the partition wall portion of the light conversion unit according to Comparative Example 2 has inconsistent width and height.

[0139] In other words, it can be seen that the base of the light conversion unit according to Example 2 has a consistent shape because the mold component and the resin composition are improved by the low viscosity resin composition.

[0140] In the following text, reference will be made to Figures 11 to 15 Describes an optical path control component according to another embodiment.

[0141] Figure 11 This is an enlarged view showing the interior of the conventional accommodating section 320.

[0142] Reference Figure 11The light conversion material 330 may also include various dispersants 10. The dispersants 10 can be dispersed and disposed in the dispersion 330a. The dispersants 10 can be used to prevent the light conversion particles 330b from agglomerating with each other. Therefore, by preventing the light conversion particles 330b from agglomerating in the dispersion 330a, the driving characteristics of the optical path control component can be improved.

[0143] The dispersant 10 may include different types of dispersants depending on whether they are polar. Specifically, the dispersant may include a first dispersant 11, a second dispersant 12, a third dispersant 13, and a fourth dispersant 14.

[0144] The first dispersant 11 can be defined as a non-polar dispersant. That is, the first dispersant 11 can be defined as a non-polar dispersant that does not carry a positive or negative charge.

[0145] The second dispersant 12 can be defined as a non-polar dispersant. Furthermore, the second dispersant can be defined as a dispersant having a particulate shape. That is, the second dispersant can have the shape of micelles formed by the aggregation of the first dispersant 11.

[0146] The third dispersant 13 can be defined as a polar dispersant. Specifically, the third dispersant 13 can be defined as a polar dispersant having a positive or negative charge. For example, the third dispersant 13 can be defined as a dispersant having a polarity opposite to that of the light-converting particles.

[0147] For example, the third dispersant can be defined as a polar particle that has a positive charge after the first dispersant 11 loses electrons through the light conversion particle 330b.

[0148] Furthermore, the fourth dispersant 14 can be defined as a polar dispersant. Specifically, the fourth dispersant 14 can be defined as a polar dispersant having a positive or negative charge. For example, the fourth dispersant 14 can be defined as a dispersant having a polarity opposite to that of the light-converting particles.

[0149] For example, the fourth dispersant can be defined as a dispersant having a particle shape formed by combining a third dispersant, which is formed by the first dispersant 11 losing electrons through the light-converting particles 330b and becoming positively charged polar particles, with the second dispersant. That is, the fourth dispersant 14 can have the shape of positively charged micelles formed by the aggregation of the first dispersant 11.

[0150] The non-polar first dispersant 11 and the second dispersant 12 can be disposed between the light conversion particles 330b in the dispersion 330a to prevent the aggregation of the light conversion particles 330b.

[0151] In addition, like the first dispersant 11 and the second dispersant 12, the polar third dispersant 13 and the fourth dispersant 14 are disposed between the light conversion particles 330b, thus preventing the aggregation of the light conversion particles 330b.

[0152] However, since the third dispersant 13 and the fourth dispersant 14 have charges different from those of the light-converting particles 330b, the polarity of the light-converting particles 330b within the dispersion 330a may decrease. Therefore, the reduced polarity of the light-converting particles 330b leads to a decrease in their movement speed when a voltage is applied, thus reducing the driving speed of the optical path control component.

[0153] Furthermore, since the third dispersant 13 and the fourth dispersant 14 are polar, they can move together with the light conversion particles 330b in the dispersion 330a when a voltage is applied, thereby hindering the movement of the light conversion particles 330b. Therefore, the moving speed of the light conversion particles 330b may be reduced, which may in turn reduce the driving speed of the optical path control component.

[0154] Therefore, the light conversion unit of the light path control component according to the embodiment can make the partition wall and / or base polar to solve the problem caused by the polar dispersant.

[0155] According to the embodiment, the optical path control member can control the properties of the materials constituting the partition wall portion 310 and / or the base portion 350 so that the partition wall portion 310 and / or the base portion 350 of the optical conversion unit have polarity.

[0156] Specifically, the partition wall portion 310 and the base portion 350 of the light conversion unit may include a resin composition.

[0157] The resin composition may contain oligomers, monomers, photoinitiators, and additives. The resin composition can form a light conversion unit through the reaction between a prepolymer in polymer form, a multifunctional monomer as a diluent, and a photoinitiator.

[0158] Prior to curing, the resin composition includes oligomers, monomers, photoinitiators, and additives, and the resin composition can be cured by ultraviolet light while forming a cross-linked network through the reaction of the polymers, monomers, and photoinitiators.

[0159] The resin composition may include urethane acrylate polymers. For example, oligomers may include urethane acrylates.

[0160] In addition, known photoinitiators for UV curing can be used as photoinitiators. Furthermore, additives may include materials for improving the release properties or electrical properties of the resin composition. For example, additives may contain a variety of materials, including release agents and antistatic agents.

[0161] Furthermore, the monomer may include multiple bonding groups. Specifically, the monomer may include various bonding groups to give the resin composition polarity.

[0162] Specifically, the monomer may include a first bonding group and a second bonding group. The first bonding group may have a greater polarity than the second bonding group. Specifically, the electronegativity of the first bonding group may be greater than that of the second bonding group.

[0163] Figure 13 This is a view showing the polarity intensity according to the type of bonding group. The first bonding group can be defined as a bonding group with an electronegativity of 0.3 to 2. The second bonding group can be defined as a bonding group with an electronegativity of 0 to less than 0.3.

[0164] The monomer may include a first bonding group. For example, the monomer may include a monomer having at least one bonding group selected from CO, CS, CN, OH, NH, C-Cl, C-Br, CI, and Si-O-Si.

[0165] In addition, the monomer may also include a second bonding group. Specifically, the monomer may also include at least one nonpolar bonding group selected from CC, C=O, and CH.

[0166] The first bonding group may be more than the second bonding group. For example, the monomer may include monomers such as dipentaerythritol pentaacrylate and diphenyl(2,4,6-trimethylbenzoyl)phosphine oxide, but the examples are not limited thereto.

[0167] Therefore, the resin composition containing the monomer can be polar. That is, the resin composition can carry a negative charge. Specifically, the contact angle θ between the resin composition containing the monomer and water can be less than 60°. More specifically, the contact angle θ between the resin composition containing the monomer and water can be from 10° to 60°.

[0168] In other words, since the resin composition contains a highly polar monomer, the resin composition containing that monomer can also be polar.

[0169] Therefore, at least one of the partition wall portion 310 and the base portion 350 of the light conversion unit formed from the resin composition may also be polar.

[0170] Specifically, at least one of the partition wall portion 310 and the base portion 350 may have a polarity opposite to that of the third dispersant 13 and the fourth dispersant 14. That is, at least one of the partition wall portion 310 and the base portion may have the same polarity as the light conversion particle 330b.

[0171] In other words, the partition wall 310, the base 350 and the light conversion particles 330b can carry a negative charge, while the third dispersant 13 and the fourth dispersant 14 can carry a positive charge.

[0172] Therefore, the polar dispersant in the dispersion 330a dispersed in the containment portion 320 can move in the direction of at least one of the partition wall portion 310 and the base portion 350.

[0173] In other words, referencing Figure 12 The partition wall and the base are electrophilic, and therefore have the property of binding with positive charges. The third and fourth dispersants, which are positively charged in the dispersant dispersed in the dispersion, can move in at least one of the partition wall and the base to bind with the negative charges of the partition wall and the base.

[0174] Therefore, the polarity of the light conversion particles can be prevented from being reduced due to the polar dispersant in the dispersion 330a, and the movement of the light conversion particles can be prevented from being hindered.

[0175] According to the embodiment, the optical path control component can improve the driving speed and driving characteristics of the optical path control component by increasing the moving speed of the optical conversion particles.

[0176] In other words, by including monomers with highly electronegative bonding groups in the resin composition forming the partition wall and / or base, the partition wall and / or base can contain multiple negative charges, thus enhancing polarity.

[0177] Therefore, the positively charged dispersant in the light conversion material can move towards the partition wall and / or base, thereby promoting the movement of the light conversion particles. Furthermore, the movement speed of the light conversion particles can be increased by preventing the decrease in the negative charge intensity of the light conversion particles due to the binding of the positively charged dispersant with the light conversion particles.

[0178] Therefore, the optical path control component according to the embodiment can have improved driving speed and driving characteristics.

[0179] In the following description, the invention will be further described with reference to the polarity of the partition wall portion and base portion formed by the resin composition of the light conversion unit forming the light path control component according to the embodiments and comparative examples. These embodiments are presented by way of example only in order to illustrate the invention more specifically. Therefore, the invention is not limited to these embodiments.

[0180] Example 3

[0181] A resin composition is formed by mixing oligomers including urethane acrylates, monomers, photoinitiators, and antistatic agents.

[0182] At this point, the monomer includes a first bonding group with an electronegativity of 0.3 to 2 and a second bonding group with an electronegativity of 0 to less than 0.3, and the number of the first bonding groups is greater than the number of the second bonding groups.

[0183] Subsequently, after preparing a mold component including a recessed portion and an embossed portion, a resin composition is filled into the recessed portion of the mold component.

[0184] Subsequently, after forming a first electrode containing indium tin oxide on a first substrate containing polyethylene terephthalate, the first electrode is bonded to a mold component.

[0185] Subsequently, after the mold components and resin composition are demolded, a base, an embossed partition wall, and an intaglio receiving portion are formed on the substrate, and light conversion material is filled into the receiving portion to form a light conversion unit.

[0186] Subsequently, after forming a second electrode containing indium tin oxide on the lower part of a second substrate containing polyethylene terephthalate, an optical path control component is formed by adhering the second electrode to the optical conversion unit.

[0187] Subsequently, after applying voltage to the optical path control component, the driving speed of the optical path control component was measured.

[0188] Comparative Example 3

[0189] Except that the monomer includes more second bonding groups than the first bonding groups, the light conversion unit is formed in the same manner as in Example 3.

[0190] Subsequently, after applying voltage to the optical path control component, the driving speed of the optical path control component was measured.

[0191] [Table 2]

[0192] <![CDATA[500cd / m 2 Arrival time (s) Example 3 2.6 Comparative Example 3 10.3

[0193] Figure 14 This is a graph showing the bonding group peaks of the resin compositions according to the examples and comparative examples, measured by X-ray photoelectron spectroscopy.

[0194] Reference Figure 14 It can be seen that the resin composition according to the embodiments contains more bonding groups with higher electronegativity than the resin composition according to the comparative examples.

[0195] Additionally, refer to Figure 15 As can be seen from Table 2, the driving speed of the optical path control component according to the embodiment is greater than the driving speed of the optical path control component according to the comparative example.

[0196] In other words, in the optical path control component according to the embodiment, the negative charge rate of the resin composition can be increased by including monomers with highly electronegative bonding groups. Therefore, by preventing movement interference and reduced movement speed caused by positively charged dispersants in the dispersant, the optical path control component can have improved driving characteristics.

[0197] In the following text, reference will be made to Figures 16 to 20 This describes a display device that utilizes an optical path control component according to an embodiment.

[0198] Reference Figures 16 to 17 According to the embodiment, the optical path control component 1000 can be disposed above or below the display panel 2000.

[0199] The display panel 2000 and the optical path control component 1000 can be configured to be bonded to each other. For example, the display panel 2000 and the optical path control component 1000 can be bonded to each other via an adhesive layer 1500. The adhesive layer 1500 can be transparent. For example, the adhesive layer 1500 can include an adhesive or adhesive layer containing an optically transparent adhesive material.

[0200] The adhesive layer 1500 may include a release film. Specifically, when bonding the optical path control component to the display panel, the optical path control component and the display panel can be bonded after the release film is removed.

[0201] 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 component may be formed below the liquid crystal panel. That is, when the surface viewed by the user in the liquid crystal panel is defined as the upper part of the liquid crystal panel, the light path control component may be disposed below the liquid crystal panel. The display panel 2000 may be formed with the following structure: a first substrate 2100 including thin-film transistors (TFTs) and pixel electrodes and a second substrate 2200 including a color filter layer are bonded to each other, and a liquid crystal layer is interposed between them.

[0202] Furthermore, the display panel 2000 can be a liquid crystal display panel with a color filter on transistor (COT) structure. In the COT structure, thin-film transistors, color filters, and a black matrix are formed on a first substrate 2100, and a second substrate 2200 is bonded to the first substrate 2100, with a liquid crystal layer interposed between them. That is, thin-film transistors can be formed on the first substrate 2100, a protective film can be formed on the thin-film transistors, and a color filter layer can be formed on the protective film. In addition, pixel electrodes that contact the thin-film transistors can be formed on the first substrate 2100. At this time, in order to improve the aperture ratio and simplify the mask process, the black matrix can be omitted, and a common electrode can be formed to serve as the black matrix.

[0203] In addition, when the display panel 2000 is a liquid crystal display panel, the display device may also include a backlight unit 3000 that provides light from the rear surface of the display panel 2000.

[0204] In other words, such as Figure 16 As shown, the light path control component can be disposed on the backlight unit 3000 below the liquid crystal panel, and the light path control component can be disposed between the backlight unit 3000 and the display panel 2000.

[0205] Or, such as Figure 17 As shown, when the display panel 2000 is an organic light-emitting diode (OLED) panel, the light path control component can be formed above the OLED panel. That is, when the surface seen by a user in the OLED panel is defined as the upper part of the OLED panel, the light path control component can be positioned above the OLED panel. The display panel 2000 may include self-emissive elements that do not require a separate light source. In the display panel 2000, thin-film transistors can be formed on the first substrate 2100, and organic light-emitting elements in contact with the thin-film transistors can be formed. The organic light-emitting element may include an anode, a cathode, and an organic light-emitting layer formed between the anode and cathode. Furthermore, a second substrate 2200 configured as a packaging substrate for encapsulation may be further included on the organic light-emitting element.

[0206] Furthermore, although not shown in the accompanying drawings, a polarizing plate may be further disposed between the optical path control member 1000 and the display panel 2000. The polarizing plate may be a linear polarizing plate or a polarizing plate that prevents reflection of external light. For example, when the display panel 2000 is a liquid crystal display panel, the polarizing plate may be a linear polarizing plate. Furthermore, when the display panel 2000 is an organic light-emitting display panel, the polarizing plate may be a polarizing plate that prevents reflection of external light.

[0207] Furthermore, additional functional layers 1300, such as anti-reflection layers and anti-glare layers, can be further provided on the optical path control component 1000. Specifically, the functional layer 1300 can be bonded to one surface of the first substrate 110 of the optical path control component. Although not shown in the figures, the functional layer 1300 can be bonded to the first substrate 110 of the optical path control component via an adhesive layer. In addition, a release film for protecting the functional layer can be provided on the functional layer 1300.

[0208] In addition, a touch panel can be further installed between the display panel and the optical path control components.

[0209] Although the accompanying drawings show the light path control component disposed at the upper part of the display panel, the embodiment is not limited thereto, and the light path control component can be disposed in various positions, such as a light-adjustable position, i.e., the lower part of the display panel or between the second substrate and the first substrate of the display panel, etc.

[0210] Furthermore, the accompanying drawings show that the light conversion unit of the light path control member according to the embodiment is in a direction parallel or perpendicular to the outer surface of the second substrate; however, the light conversion unit is formed to be inclined at a predetermined angle to the outer surface of the second substrate. Therefore, ripples occurring between the display panel and the light path control member can be reduced.

[0211] Reference Figures 18 to 20 The optical path control component according to the embodiment can be applied to various display devices.

[0212] Reference Figures 18 to 20 The optical path control component according to the embodiment can be applied to a display device that displays images.

[0213] For example, such as Figure 18 As shown, when electricity is applied to the optical path control component, the receiving portion acts as a light-transmitting portion, thereby enabling the display device to be driven in an open mode, such as... Figure 19 As shown, when no power is applied to the optical path control member, the receiving part acts as a light blocking part, thereby enabling the display device to be driven in a light blocking mode.

[0214] Therefore, users can easily drive the display device in either privacy or normal mode depending on the amount of power applied.

[0215] Light emitted from the backlight unit or the self-emissive element can move from the first substrate to the second substrate. Alternatively, light emitted from the backlight unit or the self-emissive element can also move from the second substrate to the first substrate.

[0216] In addition, refer to Figure 20 The display device that uses the optical path control component according to the embodiment can also be applied to the interior of a vehicle.

[0217] For example, a display device including the optical path control component according to an embodiment can display video confirmation information of the vehicle and the vehicle's movement route. The display device can be disposed between the driver's seat and the passenger seat of the vehicle.

[0218] Furthermore, the optical path control component according to the embodiment can be applied to an instrument panel that displays vehicle speed, engine, alarm signals, etc.

[0219] Furthermore, the optical path control component according to the embodiment can be applied to the windshield (FG) or left and right windows of a vehicle.

[0220] The features, structures, effects, etc., described in the above embodiments are included in at least one embodiment of the present invention, but are not limited to one embodiment. Furthermore, those skilled in the art can combine or modify the features, structures, and effects shown in each embodiment with respect to other embodiments. Therefore, it should be understood that such combinations and modifications are included within the scope of the present invention.

[0221] Furthermore, while the embodiments have been primarily described above, these embodiments are merely examples and do not limit the invention. Those skilled in the art will understand that numerous variations and applications not explicitly stated above can be made without departing from the essential characteristics of the invention. For example, changes can be made to the various components specifically represented in the embodiments. Moreover, it should be understood that differences associated with such changes and applications are included within the scope of the invention as defined in the appended claims.

Claims

1. An optical path control component, comprising: First substrate; The first electrode is disposed above the first substrate; The second substrate is disposed above the first substrate; The second electrode is disposed below the second substrate; as well as The light conversion unit is disposed between the first electrode and the second electrode. The light conversion unit comprises a resin composition. The resin composition includes oligomers, monomers, photoinitiators, and additives. The monomer comprises a first monomer with a molecular weight of less than 600 g / mol and a second monomer with a molecular weight greater than 600 g / mol, and the light conversion unit comprises: Multiple partition walls, a receiving portion between the multiple partition walls, and a base located between the partition walls and the second electrode. The thickness deviation of the partition wall is 5% to 10%. Wherein, the thickness of the base is less than 10 μm, and The weight percentage ratio of the first monomer to the second monomer is 1:3 to 2:

3.

2. The optical path control component according to claim 1, wherein, The viscosity of the resin composition is between 200 cPs and 400 cPs.

3. The optical path control component according to claim 1, wherein, Based on the total weight of the resin composition, the content of the oligomer is 40% to 60% by weight. Wherein, based on the total weight of the resin composition, the content of the monomer is 30% to 40% by weight. Wherein, based on the total weight of the resin composition, the content of the photoinitiator is from 0.1% to 5% by weight. Wherein, based on the total weight of the resin composition, the content of the additive is from 0.1% by weight to 5% by weight.

4. The optical path control component according to claim 1, wherein, The width deviation of the plurality of partition walls is 3% to 10%.

5. The optical path control component according to claim 1, wherein, The thickness of the base is 1 μm to 10 μm.

6. The optical path control component according to claim 1, wherein, A light conversion material is provided in the receiving part. The light conversion material comprises a dispersion and light conversion particles. The light-converting particles have electric charge polarity.

7. The optical path control component according to claim 6, wherein, The monomer includes a first bonding group and a second bonding group. Wherein, the electronegativity of the first bonding group is 0.3 to 2. Wherein, the electronegativity of the second bonding group is 0 to 0.

3. The number of the first bonding groups is greater than the number of the second bonding groups.

8. The optical path control component according to claim 7, wherein, The contact angle between the resin composition and water is 10° to 60°.

9. The optical path control component according to claim 7, wherein, The monomer contains at least one bonding group selected from CO, CS, CN, OH, NH, C-Cl, C-Br, CI, and Si-O-Si.

10. The optical path control component according to claim 7, wherein, The light conversion material also includes a dispersant. The dispersant includes polar dispersants and non-polar dispersants.

11. The optical path control component according to claim 10, wherein, The light conversion material includes light conversion particles, and The light-converting particles and the polar dispersant have opposite polarities.

12. The optical path control component according to claim 10, wherein, The polarity of at least one of the partition wall and the base is opposite to the polarity of the polar dispersant.

13. The optical path control component according to claim 12, wherein, At least one of the partition wall and the base includes a negative charge.

14. A display device, comprising: A panel, including at least one of a display panel and a touch panel; as well as The optical path control component of claim 1, wherein the optical path control component is disposed above or below the panel.

15. The display device according to claim 14, wherein, The panel includes a backlight unit and a liquid crystal display panel. The optical path control component is disposed between the backlight unit and the liquid crystal display panel, and The light emitted from the backlight unit moves along the direction from the first substrate to the second substrate.

16. The display device according to claim 14, wherein, The panel includes an organic light-emitting diode panel. The optical path control component is disposed above the organic light-emitting diode panel, and The light emitted from the panel moves along the direction from the first substrate to the second substrate.

Images