Light path control component and display device including the same

Abstract

According to an embodiment, the optical path control component includes: a first substrate; a first electrode, arranged on the first substrate; a second substrate, arranged on the first substrate; a second electrode, arranged below the second substrate; and a light conversion portion, arranged between the first electrode and the second electrode, wherein the light conversion portion includes alternately arranged partition wall portions and accommodating portions, the transmittance of the accommodating portion changes according to the application of voltage, and the accommodating portion includes a dispersion and light conversion particles dispersed in the dispersion, the contact surfaces of the partition wall portions and the accommodating portion have an inclination angle relative to a reference axis in a direction perpendicular to the upper surface of the first substrate, and the inclination angle is 1° to 10°.

Description

Technical Field

[0001] Embodiments relate to a light path control member and a display device including the light path control member. Background Art

[0002] The shading film shields the light emitted from the light source and is attached to the front surface of the display panel (which is a display device used for mobile phones, laptops, tablets, vehicle navigation devices, vehicle touch screens, etc.), so that the shading film adjusts the viewing angle of the light according to the incident angle of the light, thereby showing clear image quality at the viewing angle required by the user when the display plays the picture.

[0003] Furthermore, light-shielding films may be used for windows of vehicles, buildings, and the like to partially block external light, thereby preventing glare or preventing the interior from being visible from the outside.

[0004] That is, the light shielding film can be a light path control member that controls the movement path of light, blocks light in a specific direction, and transmits light in a specific direction. Therefore, by controlling the light transmission angle through the light shielding film, the user's viewing angle can be controlled.

[0005] At the same time, this shading film can be a shading film that can always control the viewing angle regardless of the surrounding environment or the user's environment, or it can be a switchable shading film that the user can turn on / off the viewing angle control according to the surrounding environment or the user's environment.

[0006] Such a switchable light-shielding film can be realized by adding electrically mobile particles to a pattern portion and changing the pattern portion into a light-transmitting portion and a light-shielding portion through dispersion and aggregation of the particles.

[0007] Meanwhile, the pattern section may be divided into a plurality of pattern sections by a plurality of partition wall sections provided between the pattern sections.

[0008] The pattern portion may be formed by forming the shape of the pattern portion in a resin material using a mold, and filling the formed pattern portion with a dispersion in which light conversion particles are dispersed.

[0009] At this time, due to the characteristics of the molding process, the pattern portion is formed while extending from the bottom to the top and has a wide, inclined surface. As a result, there is a problem: above the pattern portion where light emerges, the light travel path is shortened due to the width of the pattern portion, resulting in a reduction in the front brightness of the light path control member.

[0010] Therefore, there is a need for a light path control member having a new structure that can solve the problem of reduction in front brightness due to the inclined surfaces and the inclined angles of the partition wall portion and the pattern portion as described above. Summary of the Invention

[0011] Technical issues

[0012] Embodiments relate to a light path control member having improved front transmittance and side shielding characteristics by controlling tilt angles of a pattern portion and a partition wall portion, and a display device including the light path control member.

[0013] Technical Solution

[0014] According to an embodiment, the optical path control component includes: a first substrate; a first electrode, arranged on the first substrate; a second substrate, arranged on the first substrate; a second electrode, arranged below the second substrate; and a light conversion portion, arranged between the first electrode and the second electrode, wherein the light conversion portion includes alternatingly arranged partition wall portions and accommodating portions, the transmittance of the accommodating portion changes according to the application of voltage, and the accommodating portion includes a dispersion and light conversion particles dispersed in the dispersion, the contact surfaces of the partition wall portions and the accommodating portion have an inclination angle relative to a reference axis in a direction perpendicular to the upper surface of the first substrate, and the inclination angle is 1° to 10°.

[0015] Beneficial effects

[0016] The light path control member according to the embodiment may control the widths of the upper and lower surfaces of the partition wall portion and the accommodation portion according to the movement path of light.

[0017] Specifically, the width of the lower surface of the partition wall portion, through which light enters, can be different from the width of the upper surface of the partition wall portion, through which light exits. In other words, an inclined surface is formed by forming a certain inclination angle on the side surface of the partition wall portion (which is the contact surface between the partition wall portion and the receiving portion). Therefore, the width of the upper surface of the partition wall portion, through which light exits, can be greater than the width of the lower surface of the partition wall portion, through which light enters.

[0018] Therefore, since light incident into the interior of the light path control member and emitted to the outside is emitted through the width of the upper surface of the partition wall portion having a larger width, the front brightness of the light path control member can be improved due to the increase in the movement path of the light.

[0019] That is, when the accommodating portion of the light path control member is driven as a light shielding portion, the width of the exit surface area in the partition wall area through which light passes can be increased. Therefore, the movement path of light is increased, and thus the front brightness of the light path control member can be improved.

[0020] In addition, by controlling the inclination angle of the partition wall and the receiving portion, the incident angle, refraction angle and total reflection can be controlled according to the refractive index difference between the partition wall and the receiving portion. Therefore, by increasing the amount of light incident on the receiving portion of the light path control member, the side shielding effect can be improved.

[0021] Furthermore, by controlling the inclination angles of the partition wall and the receiving portion, the incident angle, refraction angle, and total internal reflection can be controlled according to the refractive index difference between the partition wall and the receiving portion. Therefore, even when the receiving portion of the light path control member is driven as a light-transmitting portion, light loss can be reduced, thereby improving the front brightness of the light path control member. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 is a perspective view showing a light path controlling member according to the embodiment.

[0023] Figure 2 and Figure 3 1 and 2 are perspective views showing a first substrate and a first electrode and a second substrate and a second electrode of a light path control member according to an embodiment, respectively.

[0024] Figure 4 and Figure 5 is a cross-sectional view showing a light path control member according to an embodiment.

[0025] Figure 6 is a view showing a cross-sectional view of a light path control member according to an embodiment for explaining a light path.

[0026] Figure 7 and Figure 8 is a cross-sectional view showing a light path control member according to another embodiment.

[0027] Figures 9 and 10 is a cross-sectional view showing a light path control member according to another embodiment.

[0028] Figures 11 to 12 is a cross-sectional view showing a light path control member according to another embodiment.

[0029] Figure 13 and Figure 14 is a cross-sectional view showing a display device to which the light path control member according to the embodiment is applied.

[0030] Figures 15 to 17 1 is a diagram for explaining one embodiment of a display device to which the light path control member according to the embodiment is applied. DETAILED DESCRIPTION

[0031] Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings. However, the spirit and scope of the present invention are not limited to a part of the described embodiments and can be implemented in various other forms, and within the spirit and scope of the present invention, one or more elements of the embodiments can be selectively combined and replaced.

[0032] In addition, unless otherwise explicitly defined and described, the terms (including technical terms and scientific terms) used in the embodiments of the present invention may be interpreted as having the same meaning as commonly understood by ordinary technicians in the field to which the present invention belongs, and terms such as those defined in commonly used dictionaries may be interpreted as having a meaning consistent with their meaning in the context of the relevant technology.

[0033] In addition, the terms used in the embodiments of the present invention are used to describe the embodiments of the present invention and are not used to limit the present invention. In this specification, unless otherwise specified in a phrase, a singular form may also include a plural form, and when described as "at least one (or more) of A (and), B and C", it may include at least one of all combinations that can be combined with A, B and C.

[0034] In addition, when describing the elements of the embodiments of the present invention, terms such as first, second, A, B, (a), and (b) may be used. These terms are only used to distinguish an element from other elements, and these terms do not limit the nature, order, or sequence of the elements.

[0035] In addition, when an element is described as being “connected,” “coupled” or “bound” to another element, it may include not only the case where the element is directly “connected,” “coupled” or “bound” to another element, but also the case where the element is “connected,” “coupled” or “bound” to another element through another element between the element and the other element.

[0036] In addition, when described as being formed or arranged "on (above)" or "under (below)" each element, "on (above)" or "under (below)" may include not only the case where two elements are directly connected to each other, but also the case where one or more other elements are formed or arranged between the two elements.

[0037] Furthermore, when expressed as “upper” or “lower”, it may include not only an upper direction based on one element but also a lower direction based on one element.

[0038] Hereinafter, an optical path control member according to an embodiment will be described with reference to the accompanying drawings. The optical path control member described below relates to a switchable optical path control member that is driven in various modes according to the movement of electrophoretic particles and application of voltage.

[0039] Reference Figures 1 to 3 , the light path control member according to the embodiment may include a first substrate 110 , a second substrate 120 , a first electrode 210 , a second electrode 220 , and a light conversion part 300 .

[0040] The first substrate 110 may support the first electrode 210. The first substrate 110 may be rigid or flexible.

[0041] In addition, the first substrate 110 may be transparent. For example, the first substrate 110 may include a transparent substrate capable of transmitting light.

[0042] The first substrate 110 may include glass, plastic, or a flexible polymer film. For example, the flexible polymer film may be made of any one of polyethylene terephthalate (PET), polycarbonate (PC), acrylonitrile butadiene styrene copolymer (ABS), polymethyl methacrylate (PMMA), polyethylene naphthalate (PEN), polyethersulfone (PES), cyclic olefin copolymer (COC), triacetyl cellulose (TAC) film, polyvinyl alcohol (PVA) film, polyimide (PI) film, and polystyrene (PS), which are examples only, but the embodiment is not limited thereto.

[0043] In addition, the first substrate 110 may be a flexible substrate having flexible characteristics.

[0044] In addition, the first substrate 110 may be a bent or curved substrate. That is, the light path control member including the first substrate 110 may also be formed to have flexible, bent or curved characteristics. Therefore, the light path control member according to the embodiment may be changed to various designs.

[0045] The first substrate 110 may have a thickness of 30 μm to 80 μm.

[0046] The first electrode 210 may be provided on one surface of the first substrate 110. In detail, the first electrode 210 may be provided on an upper surface of the first substrate 110. That is, the first electrode 210 may be provided between the first substrate 110 and the second substrate 120.

[0047] The first electrode 210 may include a transparent conductive material, such as a metal oxide, such as indium tin oxide, indium zinc oxide, copper oxide, tin oxide, zinc oxide, titanium oxide, or the like.

[0048] The first electrode 210 may be provided in a film shape on the first substrate 110. In detail, the light transmittance of the first electrode 210 may be about 80% or more.

[0049] The first electrode 210 may have a thickness of about 0.1 μm to about 0.5 μm.

[0050] Alternatively, the first electrode 210 may include various metals to achieve low resistance. For example, the first electrode 210 may include at least one of chromium (Cr), nickel (Ni), copper (Cu), aluminum (Al), silver (Ag), molybdenum (Mo), gold (Au), titanium (Ti), and alloys thereof.

[0051] The first electrode 210 may be provided on the entire surface of one surface of the first substrate 110. In detail, the first electrode 210 may be provided as a surface electrode on one surface of the first substrate 110. However, the embodiment is not limited thereto, and the first electrode 210 may be formed of a plurality of pattern electrodes having a predetermined pattern.

[0052] For example, the first electrode 210 may include a plurality of conductive patterns. In detail, the first electrode 210 may include a plurality of mesh lines crossing each other and a plurality of mesh openings formed by the mesh lines.

[0053] Therefore, even if the first electrode 210 includes metal, since the first electrode is not visible from the outside, visibility can be improved. In addition, the light transmittance is increased by the opening, so that the brightness of the light path control member according to the embodiment can be improved.

[0054] The second substrate 120 may be disposed on the first substrate 110. In detail, the second substrate 120 may be disposed on the first electrode 210 on the first substrate 110.

[0055] The second substrate 120 may include a material capable of transmitting light, a transparent material, or a material that is the same as or similar to the first substrate 110 described above.

[0056] For example, the second substrate 120 may include glass, plastic, or a flexible polymer film. For example, the flexible polymer film may be made of any one of polyethylene terephthalate (PET), polycarbonate (PC), acrylonitrile butadiene styrene copolymer (ABS), polymethyl methacrylate (PMMA), polyethylene naphthalate (PEN), polyethersulfone (PES), cyclic olefin copolymer (COC), triacetyl cellulose (TAC) film, polyvinyl alcohol (PVA) film, polyimide (PI) film, and polystyrene (PS), which are examples only, but the embodiment is not limited thereto.

[0057] In addition, the second substrate 120 may be a flexible substrate having flexible characteristics.

[0058] In addition, the second substrate 120 may be a bent or curved substrate. That is, the light path control member including the second substrate 120 may also be formed to have flexible, bent or curved characteristics. Therefore, the light path control member according to the embodiment may be changed to various designs.

[0059] The second substrate 120 may have a thickness of 30 mm to 80 mm.

[0060] The second electrode 220 may be provided on one surface of the second substrate 120. Specifically, the second electrode 220 may be provided on the lower surface of the second substrate 120. That is, the second electrode 220 may be provided on the surface of the second substrate 120 facing the first substrate 110. That is, the second electrode 220 may be provided to face the first electrode 210 on the first substrate 110. That is, the second electrode 220 may be provided between the first electrode 210 and the second substrate 120.

[0061] The second electrode 220 may include a transparent conductive material, for example, a metal oxide such as indium tin oxide, indium zinc oxide, copper oxide, tin oxide, zinc oxide, titanium oxide, etc.

[0062] The second electrode 220 may be provided in a film shape on the first substrate 110. In addition, the light transmittance of the second electrode 220 may be about 80% or more.

[0063] The second electrode 220 may have a thickness of about 0.1 μm to about 0.5 μm.

[0064] Alternatively, the second electrode 220 may include various metals to achieve low resistance. For example, the second electrode 220 may include at least one of chromium (Cr), nickel (Ni), copper (Cu), aluminum (Al), silver (Ag), molybdenum (Mo), gold (Au), titanium (Ti), and alloys thereof.

[0065] The second electrode 220 may be provided on the entire surface of one surface of the second substrate 120. In detail, the second electrode 220 may be provided as a surface electrode on one surface of the second substrate 120. However, the embodiment is not limited thereto, and the second electrode 220 may be formed of a plurality of pattern electrodes having a predetermined pattern.

[0066] For example, the second electrode 220 may include a plurality of conductive patterns. In detail, the second electrode 220 may include a plurality of mesh lines crossing each other and a plurality of mesh openings formed by the mesh lines.

[0067] Therefore, even if the second electrode 220 includes metal, visibility can be improved because the second electrode 220 is not visible from the outside. In addition, light transmittance is increased by the opening, so that the brightness of the light path control member according to the embodiment can be improved.

[0068] The light conversion part 300 may be disposed between the first substrate 110 and the second substrate 120. In detail, the light conversion part 300 may be disposed between the first electrode 210 and the second electrode 220.

[0069] The adhesive layer 400 may be provided at least one between the light conversion part 300 and the first substrate 110 and between the light conversion part 300 and the second substrate 120 , and the first substrate 110 , the second substrate 120 , and the light conversion part 300 may be adhered to each other by the adhesive layer 400 .

[0070] Reference Figure 4 and Figure 5 , the adhesive layer 410 is provided between the first electrode 210 and the light conversion part 300 , whereby the light conversion part 300 and the first electrode 210 may be adhered to each other.

[0071] In addition, a buffer layer 420 for improving adhesion between the light conversion part 300 and the first electrode 210 is provided between the light conversion part 300 and the second electrode 220 , and the light conversion part 300 and the second electrode 220 , which are different materials, can be easily bonded through the buffer layer 420 .

[0072] The light conversion part 300 may include a partition wall part 310 and a receiving part 320 .

[0073] The partition wall portion 310 can be defined as a partition wall region that separates the receiving portion. In other words, the partition wall portion 310 is a partition wall region that separates multiple receiving portions. The receiving portion 320 can be defined as a region that becomes a light-shielding portion or a light-transmitting portion according to the application of a voltage.

[0074] The partition walls 310 and the receiving portions 320 may be arranged alternately with each other. The partition walls 310 and the receiving portions 320 may be arranged to have different widths. For example, the width of the partition walls 310 may be greater than the width of the receiving portions 320.

[0075] The partition walls 310 and the receiving portions 320 may be arranged alternately. Specifically, the partition walls 310 and the receiving portions 320 may be arranged alternately. That is, each partition wall 310 may be arranged between adjacent receiving portions 320, and each receiving portion 320 may be arranged between adjacent partition walls 310.

[0076] The partition wall portion 310 may include a transparent material. The partition wall portion 310 may include a material that can transmit light.

[0077] The partition wall portion 310 may include a resin material. The partition wall portion 310 may include a photocurable resin material. As an example, the partition wall portion 310 may include a UV resin or a transparent photoresist resin. Alternatively, the partition wall portion 310 may include a polyurethane resin or an acrylic resin.

[0078] The partition wall portion 310 may transmit light incident on either one of the first substrate 110 and the second substrate 120 toward the other substrate.

[0079] For example, in Figure 4 and Figure 5 In the embodiment, light may be emitted in the direction of the second substrate 120 and may be incident in the direction of the first substrate 110. The partition wall portion 310 transmits light, and the transmitted light may move in the direction of the second substrate 120.

[0080] The sealing portion 500 that seals the light path control member may be provided on the side surface of the partition wall portion, and the side surface of the light conversion portion 300 may be sealed by the sealing portion.

[0081] The receiving portion 320 may include a light conversion material 330 including a dispersion 320a and light conversion particles 320b. Specifically, the dispersion 320a may be filled in the receiving portion 320, and a plurality of light conversion particles 320b may be dispersed in the dispersion 330a.

[0082] Dispersion 320a may be a material for dispersing light-converting particles 320b. Dispersion 320a may include a transparent material. Dispersion 320a may include a non-polar solvent. In addition, dispersion 320a may include a material capable of transmitting light. For example, dispersion 320a may include at least one of a halocarbon-based oil, a paraffin-based oil, and isopropyl alcohol.

[0083] The light conversion particles 320b may be disposed to be dispersed in the dispersion 330a. In detail, a plurality of light conversion particles 320b may be disposed to be spaced apart from each other in the dispersion 330a.

[0084] Light-converting particles 320b may include a material capable of absorbing light. In other words, light-converting particles 320b may be light-absorbing particles. Light-converting particles 320b may have a color. For example, light-converting particles 320b may have a black-based color. For example, light-converting particles 320b may include carbon black particles.

[0085] The surface of the light-conversion particles 320b may be charged, and thus, the light-conversion particles 320b may move in one direction according to the application of voltage.

[0086] The light transmittance of the container 320 can be changed by the light-converting particles 320b. Specifically, the container 320 can be transformed into a light-shielding portion and a light-transmitting portion by changing the light transmittance by the light-converting particles 320b. In other words, the container 320 can change the transmittance of light passing through the container 320 by dispersing and aggregating the light-converting particles 320b disposed therein in the dispersion 320a.

[0087] For example, the light path member according to the embodiment may be changed from the first mode to the second mode or from the second mode to the first mode by voltages applied to the first and second electrodes 210 and 220 .

[0088] In detail, in the light path control member 1000 according to the embodiment, the accommodating portion 320 becomes a light shielding portion in the first mode, and light at a specific angle can be blocked by the accommodating portion 320. That is, the user's viewing angle from the outside can be narrowed.

[0089] Furthermore, in the light path control member 1000 according to the embodiment, the receiving portion 320 becomes a light-transmitting portion in the second mode, and in the light path control member according to the embodiment, light can be transmitted through both the partition wall portion 310 and the receiving portion 320. That is, the user's viewing angle from the outside can be widened.

[0090] Switching from the first mode to the second mode, i.e., switching of the container 320 from a light-shielding portion to a light-transmitting portion, can be achieved by the movement of the light-converting particles 320b in the container 320. Specifically, the light-converting particles 320b have a charge on their surface and can move in the direction of the first electrode 210 or the second electrode 220 by an applied voltage or by the characteristics of the charge. In other words, the light-converting particles 320b may be electrophoretic particles.

[0091] In detail, the accommodation part 320 may be electrically connected to the first electrode 210 and the second electrode 220 .

[0092] In this case, when no voltage is applied to the light path control member from the outside, the light conversion particles 320b of the container 320 are uniformly dispersed in the dispersion 330a, and light is blocked by the light conversion particles in the container 320. Therefore, in the first mode, the container 320 can be driven as a light shielding portion.

[0093] Alternatively, when a voltage is applied to the light path control member from the outside, the light conversion particles 320b can move. For example, the light conversion particles 320b can be moved toward one end or the other end of the receiving portion 320 by the voltage transmitted through the first electrode 210 and the second electrode 220. In other words, the light conversion particles 320b can move from the receiving portion 320 toward the first electrode or the second electrode.

[0094] In detail, when a voltage is applied to the first electrode 210 and / or the second electrode 220, an electric field is formed between the first electrode 210 and the second electrode 220. Also, the photoconversion particles 320b in a negatively charged state may move in the direction of the positively charged electrode of the first electrode 210 and the second electrode 220 using the dispersion 320a as a medium.

[0095] In detail, when a voltage is applied to the first electrode 210 and / or the second electrode 220, an electric field is formed between the first electrode 210 and the second electrode 220 and the charged carbon black, that is, the photoconversion particles can move toward the positive pole of the first electrode 210 and the second electrode 220 using the dispersion 320a as a medium.

[0096] That is, when a voltage is applied to the first electrode 210 and / or the second electrode 220, as shown in FIG. Figure 4 As shown, the light conversion particles 320b may move in the dispersion 330a toward the first electrode 210. That is, the light conversion particles 320b move in one direction, and the receiving portion 320 may be driven to be a light-transmitting portion.

[0097] In addition, when no voltage is applied to the first electrode 210 and / or the second electrode 220, as shown in FIG. Figure 5 As shown, the light conversion particles 320 b may be uniformly dispersed in the dispersion 320 a to drive the receiving portion 320 into a light shielding portion.

[0098] Therefore, the light path control member according to the embodiment can be driven in two modes depending on the user's surrounding environment. That is, when the user only needs light transmission at a specific viewing angle, the receiving portion is driven as a light-shielding portion, or in an environment where the user requires high brightness, a voltage can be applied to drive the receiving portion as a light-transmitting portion.

[0099] Therefore, since the light path control member according to the embodiment can be implemented in two modes according to the needs of the user, the light path control member can be applied regardless of the environment of the user.

[0100] Meanwhile, in the light path control member according to the embodiment, the partition wall portion 310 and the accommodation portion 320 may have opposite shapes.

[0101] In detail, when the contact surface of the partition wall portion 310 and the first electrode 210 is defined as the lower surface of the partition wall portion and the opposite surface is defined as the upper surface of the partition wall portion, the width W2a of the lower surface of the partition wall portion may be smaller than the width W2b of the upper surface of the partition wall portion.

[0102] Furthermore, when the contact surface of the accommodation portion 320 and the first electrode 210 is defined as a lower surface of the accommodation portion and the opposite surface is defined as an upper surface of the accommodation portion, a width W1a of the lower surface of the accommodation portion may be greater than a width W1b of the upper surface of the accommodation portion.

[0103] For example, assuming that light is incident on the lower surface of the first substrate 110 and exits toward the upper surface of the second substrate 120, the width of the incident surface of the partition wall portion is greater than the width of the light emitting surface, and the width of the exit surface of the accommodating portion is smaller than the width of the light incident surface.

[0104] That is, in partition wall portion 310, width W2b of the upper surface of the partition wall portion where light exits is greater than width W2a of the lower surface where light enters. Furthermore, in receiving portion 320, width W1b of the upper surface of the receiving portion where light exits may be smaller than width W1a of the lower surface where light enters.

[0105] That is, a width W2 b of an upper surface of the partition wall portion 310 may be greater than a width W2 a of a lower surface of the partition wall portion facing the display panel from which light exits.

[0106] Therefore, in the first mode of the light path control member according to the embodiment (ie, when voltage is applied and the light conversion particles 320b are dispersed in the dispersion 320a, the accommodation portion 320 is driven as a light shielding portion), the front brightness of the light path control member can be improved.

[0107] That is, when the light path control member is driven in the first mode, the region where light is emitted from the light path control member is the region of the partition wall portion 310. In this case, by increasing the width of the upper surface of the partition wall portion from which light is emitted, the amount of light emitted toward the second substrate 120 can be increased.

[0108] Therefore, the light path control member according to the embodiment can increase the amount of emitted light, thereby improving the front brightness of the light path control member.

[0109] At the same time, refer to Figure 6 In the optical path control member according to the embodiment, the partition wall portion 310 and the receiving portion 320 may have inclined surfaces. Specifically, the partition wall portion 310 and the receiving portion 320 may include contact surfaces with each other, and the contact surface CS of the partition wall portion 310 and the receiving portion 320 may have an inclined surface. In other words, the contact surfaces may be the inclined surface of the partition wall portion 310 and the inclined surface of the receiving portion 320.

[0110] In detail, the partition wall portion 310 or the receiving portion 320 may include an inclined surface having an inclined angle θ with respect to a reference axis AX, which is a direction perpendicular to the upper surface of the first substrate 110 .

[0111] In this case, the widths of the inclined surfaces opposing each other may be inclined such that the width of the partition wall portion increases while extending from the lower surface of the partition wall portion toward the upper surface of the partition wall portion.

[0112] Alternatively, the widths of the inclined surfaces facing each other may be inclined such that the width of the accommodation portion decreases while extending from the lower surface of the accommodation portion toward the upper surface of the accommodation portion.

[0113] Furthermore, the inclined surface may be inclined such that the width of the partition wall portion increases and the width of the accommodation portion decreases while extending in the moving direction of light.

[0114] For example, the contact surface CS, which is the inclined surface of the partition wall portion 310 and the receiving portion 320, can be tilted while having an inclination angle of 10° or less with respect to the reference axis AX (the reference axis AX is a direction perpendicular to the upper surface of the first substrate 110). In detail, the inclined surface of the partition wall portion 310 or the receiving portion 320 can be tilted while having an inclination angle of 5° or less with respect to the reference axis AX (the reference axis AX is a direction perpendicular to the upper surface of the first substrate 110). In more detail, the inclined surface of the partition wall portion 310 or the receiving portion 320 can be tilted while having an inclination angle of 3° or less with respect to the reference axis AX (the reference axis AX is a direction perpendicular to the upper surface of the first substrate 110). In more detail, the inclined surface of the partition wall portion 310 or the receiving portion 320 can be tilted while having an inclination angle of 1° to 3° with respect to the reference axis AX (the reference axis AX is a direction perpendicular to the upper surface of the first substrate 110).

[0115] It is difficult to achieve an inclination angle of the partition wall portion 310 or the receiving portion 320 with an inclination angle of less than 1° with respect to the reference axis AX (the reference axis AX is a direction perpendicular to the upper surface of the first substrate 110). That is, an imprinting process is performed to form the partition wall portion and the receiving portion. Due to the characteristics of the mold forming the partition wall portion and the receiving portion and the material constituting the partition wall portion, the partition wall portion and the receiving portion have an inclined surface with a certain inclination angle. At this time, it may be difficult to form an inclined surface of the partition wall portion 310 or the receiving portion 320 with an inclination angle of less than 1° with respect to the reference axis AX (the reference axis AX is a direction perpendicular to the upper surface of the first substrate 110).

[0116] In addition, when the inclination angle of the inclined surface of the partition wall portion 310 or the accommodating portion 320 relative to the reference axis AX (the reference axis AX is a direction perpendicular to the upper surface of the first substrate 110) exceeds 10°, the amount of outgoing light of the optical path control component will be reduced, thereby reducing the front brightness of the optical path control component.

[0117] The partition wall portion 310 and the receiving portion 320 may have different refractive indices.

[0118] Specifically, the refractive index of the partition wall portion 310 may be 1.64 or less. Specifically, the refractive index of the partition wall portion 310 may be 1.36 to 1.64. The refractive index of the partition wall portion 310 may correspond to the refractive index of the resin composition constituting the partition wall portion.

[0119] In addition, the refractive index of the container 320 may be 1.45 or less. Specifically, the refractive index of the container 320 may be 1.42 to 1.45. The refractive index of the container 320 may correspond to the refractive index of the dispersion 320a contained in the container 320.

[0120] That is, the refractive index of the partition wall portion 310 may be relatively greater than the refractive index of the receiving portion 320 .

[0121] Therefore, light moving from the first substrate 110 toward the second substrate 120 may have different characteristics when moving from the partition wall portion 310 to the receiving portion 320 and when moving from the receiving portion 320 to the partition wall portion 310 .

[0122] For example, the incident angle θ1 of the first light L1 moving from the partition wall portion 310 to the receiving portion 320 and the incident angle θ2 of the second light L2 moving from the receiving portion 320 to the partition wall portion 310 may be different.

[0123] That is, the first light L1 moving from the region with a large refractive index to the region with a small refractive index may have a small incident angle, and the second light L2 moving from the region with a small refractive index to the region with a large refractive index may have a relatively larger incident angle than the first light L1.

[0124] In this case, inclined surfaces having a predetermined angle may be formed on the partition wall portion 310 and the receiving portion 320. Therefore, the incident angle of the second light L2 moving from the region having a small refractive index to the region having a large refractive index, that is, from the receiving portion 320 to the partition wall portion 310, may decrease.

[0125] Therefore, the total reflection of the second light L2 can be reduced, and the light loss due to the total reflection can be reduced, thereby improving the front brightness of the light path control member.

[0126] That is, because the refractive index of the partition wall portion 310 is greater than that of the accommodating portion 320, the light loss caused by total internal reflection of the second light L2 is greater than that of the first light L1. Therefore, by minimizing the incident angle of the second light L2, total internal reflection can be reduced. Consequently, the front brightness of the light path control member in the second mode can be improved.

[0127] Furthermore, by forming the inclined surfaces of the predetermined angle in the above-described shape on the partition wall portion 310 and the receiving portion 320, the amount of incident light entering the receiving portion 320 can be increased. Therefore, the side shielding effect in the first mode can be improved.

[0128] The partition wall portion 310 and the receiving portion 320 may be provided to have different widths.

[0129] Specifically, the width W2a of the lower surface of the partition wall portion and the width W1a of the lower surface of the receiving portion may be different from each other. Alternatively, the width W2b of the upper surface of the partition wall portion and the width W1b of the upper surface of the receiving portion may be different from each other.

[0130] In detail, the maximum width of the receiving portion may be about 10% to 40% of the sum of the width of the receiving portion and the partition wall portion, and the maximum width of the partition wall portion may be about 60% to 90% of the sum of the width of the receiving portion and the partition wall portion.

[0131] When the maximum width of the accommodating portion exceeds 40% of the combined width of the accommodating portion and the width of the partition wall, the accommodating portion may be visually recognized from the outside, thereby reducing the visibility of the light path control member. Furthermore, when the maximum width of the accommodating portion is less than 10% of the combined width of the accommodating portion and the width of the partition wall, the accommodating portion is too narrow, potentially causing defects when injecting the dispersion into the accommodating portion.

[0132] For example, the sum of the width W2a of the lower surface of the partition wall and the width W1a of the lower surface of the accommodation portion or the sum of the width W2b of the upper surface of the partition wall and the width W1b of the upper surface of the accommodation portion may be about 100 μm.

[0133] When the sum of the width W2a of the lower surface of the partition wall portion and the width W1a of the lower surface of the accommodating portion or the sum of the width W2b of the upper surface of the partition wall portion and the width W1b of the upper surface of the accommodating portion exceeds 100 μm, it is difficult to arrange multiple accommodating portions in the optical path control member, and the spacing between the accommodating portions will be reduced, thereby reducing the side shielding effect.

[0134] Figure 7 and Figure 8 2 is a diagram showing other cross-sectional views of the light path control member according to the embodiment.

[0135] Different from Figure 4 and Figure 5 , refer to Figure 7 and Figure 8 , in the light path control member according to the embodiment, the accommodation portion 320 may be provided to be in contact with the electrode.

[0136] For example, the accommodation part 320 may be disposed in direct contact with the first electrode 210 .

[0137] Therefore, the first electrode 210 and the receiving portion 320 are not separated but are disposed in direct contact with each other. Therefore, the voltage applied by the first electrode 210 can be easily transmitted to the receiving portion 320.

[0138] Therefore, since the moving speed of the light conversion particles 320 b in the accommodation portion 320 can be increased, the driving characteristics of the light path control member can be improved.

[0139] The light path control member according to the embodiment may control the widths of the upper and lower surfaces of the partition wall portion and the accommodation portion according to the movement path of light.

[0140] Specifically, the width of the lower surface of the partition wall portion, through which light enters, can be different from the width of the upper surface of the partition wall portion, through which light exits. Specifically, an inclined surface is formed by forming a certain inclination angle on the side surface of the partition wall portion (which is the contact surface between the partition wall portion and the receiving portion). Thus, the width of the upper surface of the partition wall portion, through which light exits, can be greater than the width of the lower surface of the partition wall portion, through which light enters.

[0141] Therefore, since light incident into the interior of the light path control member and emitted to the outside is emitted through the width of the upper surface of the partition wall portion having a relatively large width, the front brightness of the light path control member can be improved due to the increase in the movement path of the light.

[0142] That is, when the accommodating portion of the light path control member is driven by the light shielding portion, the width of the exit surface in the partition wall region through which light passes can be increased. Therefore, the light movement path is increased, thereby improving the front brightness of the light path control member.

[0143] In addition, by controlling the inclination angle of the partition wall and the receiving portion, the incident angle, refraction angle and total reflection can be controlled according to the refractive index difference between the partition wall and the receiving portion. Therefore, by increasing the amount of light incident on the receiving portion of the light path control member, the side shielding effect can be improved.

[0144] Furthermore, by controlling the inclination angles of the partition wall and the receiving portion, the incident angle, refraction angle, and total internal reflection can be controlled according to the refractive index difference between the partition wall and the receiving portion. Therefore, even if the receiving portion of the light path control member is driven as a light-transmitting portion, light loss can be reduced, thereby improving the front brightness of the light path control member.

[0145] Hereinafter, the present invention will be described in more detail by the transmittance of the light path control member according to the embodiment. These embodiments are presented only as examples to explain the present invention in more detail. Therefore, the present invention is not limited to these examples.

[0146] Example 1

[0147] The above-mentioned light path control member is manufactured.

[0148] Specifically, a first electrode is provided on a first substrate, and a second electrode is provided on a second substrate. A light conversion unit including a partition wall portion and a receiving portion is provided and adhered on the first electrode, and a second substrate and the second electrode are provided and adhered on the light conversion unit to form a light path control member.

[0149] In this case, the contact surface of the partition wall portion and the accommodation portion is formed as an inclined surface having an inclined angle.

[0150] The inclined surface is inclined while extending from the direction of incident light through the light path control member toward the direction of outgoing light, so that the width of the accommodation portion becomes narrower, that is, the width of the partition wall portion becomes wider.

[0151] Then, the front transmittance and the side transmittance of the light path control member were measured.

[0152] Comparative Example

[0153] The light path controlling member was manufactured in the same manner as in Example.

[0154] In this case, the contact surface of the partition wall portion and the accommodation portion is formed as an inclined surface having an inclined angle.

[0155] The inclined surface is inclined while extending from the direction of incident light through the light path control member toward the direction of outgoing light, so that the width of the accommodation portion becomes wider, that is, the width of the partition wall portion becomes narrower.

[0156] Then, the front transmittance and the side transmittance of the light path control member were measured.

[0157] [Table 1]

[0158]

[0159] [Table 2]

[0160]

[0161] Referring to Table 1 and Table 2, the light path control member according to the embodiment has higher front transmittance and lower side transmittance than the light path control member according to the comparative example.

[0162] That is, the light path control member according to the embodiment has better front brightness and side shielding effects than the light path control member according to the comparative example.

[0163] That is, compared with the light path control member according to the comparative example, the light path control member according to the embodiment can improve the front brightness and the side shielding effect by controlling the shapes and inclination angles of the inclined surfaces of the partition wall portion and the accommodation portion.

[0164] In the following, reference will be made to Figures 9 to 12 Description of a Light Path Control Member According to Another Embodiment In the description of a light path control member according to another embodiment, the same explanation as that of the light path control member according to the above embodiment is omitted, and the same reference numerals are given to the same components.

[0165] Reference Figures 9 to 12 , in the light path control member according to another embodiment, the surface resistance and the volume resistance of the partition wall portion 310 may be controlled to achieve improved characteristics of the light conversion portion.

[0166] In detail, the partition wall portion 310 may have high volume resistance while having low surface resistance.

[0167] The surface resistance of the partition wall 310 can be controlled by adding charged particles to the interior of the partition wall 310. Specifically, by adding a certain weight percentage of antistatic agent to the photocurable resin, the partition wall 310 can achieve a surface resistance within a certain range.

[0168] For example, by adding about 0.01 wt % to 10 wt % of an antistatic agent to the entire resin composition forming the partition wall portion, the partition wall portion can achieve a surface resistance within a specific size range.

[0169] The antistatic agent may include various antistatic agents, for example, nano metal particles (eg, carbon, ITO, ZTO, and silver), conductive polymers, and low molecular weight polymers.

[0170] The antistatic agent can play a role in reducing the surface resistance of the partition wall portion by migrating to the surface of the partition wall portion within the resin composition forming the partition wall portion.

[0171] That is, the antistatic agent may be provided on the surface of the partition wall portion within the partition wall portion. Therefore, the antistatic agent can reduce the surface resistance of the partition wall portion while maintaining the volume resistance of the partition wall portion.

[0172] For example, the surface resistance of the partition wall portion 310 may be 10 12 Ω / sq or less. Specifically, the surface resistance of the partition wall portion 310 may be 10 5 Ω / sq to 10 12 Ω / sq. The surface resistance of the partition wall portion 310 is less than 10 5 Ω / sq process may be difficult to achieve. When the surface resistance of the partition wall portion 310 exceeds 10 12 When the resistance of the partition wall portion is greater than Ω / sq, a driving voltage for forming a potential difference between the first electrode 210 and the second electrode 220 increases due to the resistance of the partition wall portion. Therefore, driving characteristics may be degraded.

[0173] In addition, the volume resistance of the partition wall portion 310 may be 10 10 Ω·cm or less. Specifically, the volume resistance of the partition wall portion 310 may be 10 5 Ω·cm to 10 10 Ω·cm, the leakage current in the partition wall portion 310 between the receiving portions 320 increases, and the driving efficiency of the light path control member decreases. In addition, when the volume resistance of the partition wall portion 310 is formed to exceed 10 10When the resistance is less than Ω·cm, the driving voltage increases due to the resistance of the partition wall portion to form a potential difference between the first electrode 210 and the second electrode 220 , thereby causing a problem of deterioration in driving characteristics.

[0174] That is, because the surface resistance of the partition wall portion of the light path control member according to the embodiment is reduced to within a certain range, a potential difference can be formed between the first electrode and the second electrode at a low driving voltage, thereby allowing the light conversion particles to be moved within the container. In other words, because the surface resistance of the interface between the partition wall portion and the first electrode and the interface between the partition wall portion and the second electrode is reduced, the light conversion particles within the container can be moved at a low driving voltage.

[0175] Furthermore, an increase in leakage current in the direction of the partition wall portion between the accommodation portions can be minimized by maintaining the volume resistance of the partition wall portion within a constant range.

[0176] Therefore, the light path control member according to the embodiment can be driven at a low driving voltage, thereby improving driving characteristics, and leakage current is minimized to reduce power consumption, thereby improving driving efficiency.

[0177] At the same time, refer to Figure 9 and Figure 10 , the partition wall portion 310 may be defined as a first partition wall portion 310 a and a second partition wall portion 310 b according to positions.

[0178] For example, the first partition wall portion 310a may be defined as a region between the second electrode 220 and the receiving portion 320. That is, the first partition wall portion 310a may be defined as a region between the lower surface of the second electrode 220 and the upper surface of the receiving portion 320 in the partition wall region.

[0179] In addition, the second partition wall portion 310b may be defined as a region between the first partition wall portion 310a and the first electrode 210. That is, the second partition wall portion 310b may be defined as a region between the accommodation portion 320 in the region between the first partition wall portion 310a and the first electrode 210 in the partition wall region.

[0180] In addition, the first partition wall portion 310 a and the second partition wall portion 310 b may be defined as positions associated with the first electrode 210 and the second electrode 220 .

[0181] In detail, the first partition wall portion 310 a may be defined as a partition wall portion disposed closer to the second electrode 220 than the first electrode 210 , and the second partition wall portion 310 b may be defined as a partition wall portion disposed closer to the first electrode 210 than the second electrode 220 .

[0182] For example, the first partition wall portion 310 a may be a base partition wall portion provided close to the second electrode, and the second partition wall portion 310 b may be a partition wall portion provided close to the first electrode.

[0183] The first partition wall portion 310a and the second partition wall portion 310b may have different resistances. In detail, the first partition wall portion 310a and the second partition wall portion 310b may have different volume resistances and different surface resistances.

[0184] For example, the first partition wall portion 310a and the second partition wall portion 310b may have different surface resistances. Specifically, the first partition wall portion 310a may have a lower surface resistance than the second partition wall portion 310b.

[0185] For example, by changing the content of the antistatic agent contained in the partition wall portion at each position, the surface resistance of the first partition wall portion 310 a and the second partition wall portion 310 b can be controlled.

[0186] Specifically, the content of the antistatic agent in the first partition wall 310a may be greater than that in the second partition wall 310b, thereby increasing the surface resistance effect of the antistatic agent in the first partition wall 310a.

[0187] Therefore, by reducing the surface resistance of the first partition wall portion 310a, it is possible to reduce the resistance between the first electrode 210 and the second electrode 220. Therefore, a potential difference between the first electrode 210 and the second electrode 220 can be achieved at a low driving voltage.

[0188] In addition, the first partition wall portion 310a and the second partition wall portion 310b may have different volume resistances. Specifically, the second partition wall portion 310b may have a higher volume resistance than the first partition wall portion 310a.

[0189] Alternatively, the first partition wall portion 310 a and the second partition wall portion 310 b may have the same or similar volume resistance.

[0190] That is, the first partition wall portion 310a and the second partition wall portion 310b may be 15 Ω·cm to 10 19 The volume resistance range of Ω·cm has the same or different resistances.

[0191] Therefore, the volume resistance of the partition wall portion between the housing portions can be increased, thereby reducing leakage current flowing from the housing portion to the partition wall portion, thereby improving the driving efficiency of the light path control member.

[0192] At the same time, refer to Figure 11 and Figure 12, the partition wall portion 310 may be defined as a first partition wall portion 310 a , a second partition wall portion 310 b , and a third partition wall portion 310 c according to positions.

[0193] For example, the first partition wall portion 310a may be defined as a region between the second electrode 220 and the receiving portion 320. That is, the first partition wall portion 310a may be defined as a region between the lower surface of the second electrode 220 and the upper surface of the partition wall portion 320 in the partition wall region.

[0194] In addition, the second partition wall portion 310b and the third partition wall portion 310c may be defined as a region between the first partition wall portion 310a and the first electrode 210. That is, the second partition wall portion 310b and the third partition wall portion 310c may be defined as a region between the accommodation portion 320 between the first partition wall portion 310a and the first electrode 220.

[0195] The second partition wall portion 310 b may be defined as a region close to the first partition wall portion 310 a in a region between the accommodation portions, and the third partition wall portion 310 c may be defined as a region close to the first electrode 210 in a region between the accommodation portions.

[0196] In addition, the first partition wall portion 310 a , the second partition wall portion 310 b , and the third partition wall portion 310 c may be defined as positions associated with the first electrode 210 and the second electrode 220 .

[0197] In detail, the first partition wall portion 310a can be defined as a partition wall portion arranged closer to the second electrode 220 than the first electrode 210, the second partition wall portion 310b and the third partition wall portion 310c can be defined as partition wall portions arranged closer to the first electrode 210 than the second electrode 220, and the third partition wall portion 310c can be defined as a partition wall portion arranged closer to the first electrode 210 than the second partition wall portion.

[0198] For example, the first partition wall portion 310 a may be a base partition wall portion provided close to the second electrode, and the second partition wall portion 310 b and the third partition wall portion 310 c may be partition wall portions provided close to the first electrode.

[0199] In the region between the accommodation parts 320 , the third partition wall portion 310 c may be provided to have a thickness of 1% to 20% of the thickness of the region between the accommodation parts.

[0200] When the thickness of the third partition wall 310c is less than 1% of the thickness of the region between the accommodating portions, a sufficient amount of antistatic agent may not be provided within the third partition wall 310c, causing the surface resistance of the third partition wall 310c to increase. Furthermore, when the thickness of the third partition wall 310c exceeds 20% of the thickness of the region between the accommodating portions, the surface resistance between the accommodating portions is reduced by the antistatic agent, thereby increasing leakage current in the direction of the accommodating portions.

[0201] The first partition wall portion 310a, the second partition wall portion 310b, and the third partition wall portion 310c may have different resistances. Specifically, the first partition wall portion 310a, the second partition wall portion 310b, and the third partition wall portion 310c may have different volume resistances and different surface resistances.

[0202] For example, the first partition wall portion 310a, the third partition wall portion 310c, and the second partition wall portion 310b may have different surface resistances. Specifically, the first partition wall portion 310a and the third partition wall portion 310c may have lower surface resistance than the second partition wall portion 310b.

[0203] For example, by changing the content of the antistatic agent contained in the partition wall portion at each position, the surface resistance of the first partition wall portion 310 a , the third partition wall portion 310 c , and the second partition wall portion 310 b can be controlled.

[0204] Specifically, the content of the antistatic agent in the partition wall portion may be greater in the first partition wall portion 310a and the third partition wall portion 310c than in the second partition wall portion 310b. Therefore, the surface resistance effect of the antistatic agent in the first partition wall portion 310a and the third partition wall portion 310c may be increased.

[0205] Therefore, the surface resistance of the first partition wall portion 310a and the third partition wall portion 310c is reduced. Therefore, the resistance between the first electrode 210 and the second electrode 220 is reduced. Therefore, the potential difference between the first electrode 210 and the second electrode 220 can be achieved at a low driving voltage.

[0206] Furthermore, the first partition wall portion 310a, the third partition wall portion 310c, and the second partition wall portion 310b may have different volume resistances. Specifically, the second partition wall portion 310b may have a higher volume resistance than the first partition wall portion 310a and the third partition wall portion 310c.

[0207] Alternatively, the first partition wall portion 310 a , the third partition wall portion 310 c , and the second partition wall portion 310 b may have the same or similar volume resistance.

[0208] That is, the first partition wall portion 310a, the third partition wall portion 310c and the second partition wall portion 310b may be 15 Ω·cm to 10 19 The volume resistance range of Ω·cm has the same or different resistances.

[0209] Therefore, the volume resistance of the partition wall between the housings increases, thereby reducing leakage current flowing from the housings toward the partition walls. This improves the driving efficiency of the light path control member.

[0210] In the following, reference is made to Figures 13 to 17 , a display device and a display apparatus to which the light path control member according to the embodiment is applied will be described.

[0211] Reference Figure 13 and 14 , the light path controlling member 1000 according to the embodiment may be disposed above or below the display panel 2000 .

[0212] The display panel 2000 and the light path control member 1000 may be arranged to be bonded to each other. For example, the display panel 2000 and the light path control member 1000 may be bonded to each other via an adhesive layer 1500. The adhesive layer 1500 may be transparent. For example, the adhesive layer 1500 may include an adhesive or an adhesive layer containing an optically transparent adhesive material.

[0213] The adhesive layer 1500 may include a release film. Specifically, when the light path control member and the display panel are bonded, the light path control member and the display panel may be bonded after removing the release film.

[0214] At the same time, refer to Figure 13 and Figure 14 One end or both ends of the light path control member may protrude, and the light conversion unit may not be provided on the protruding portion. The protruding area is an electrode connection portion, and the external printed circuit board and the light path control member may be connected through the electrode connection portion.

[0215] 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 below the liquid crystal panel. That is, when the user viewing 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. The display panel 2000 may be formed as a structure in which a first substrate 2100 including thin film transistors (TFTs) and pixel electrodes and a second substrate 2200 including a color filter layer are joined with a liquid crystal layer interposed therebetween.

[0216] In addition, the display panel 2000 can be a liquid crystal display panel of a color filter on transistor (COT) structure, in which a thin film transistor, a color filter, and a black matrix are formed at the first substrate 2100 and the second substrate 2200 is bonded to the first substrate 2100 through an interposed liquid crystal layer. That is, a thin film transistor can be formed on the first substrate 2100, a protective film can be formed on the thin film transistor, and a color filter layer can be formed on the protective film. In addition, a pixel electrode in contact with the thin film transistor can be formed on the first substrate 2100. At this time, in order to increase the aperture ratio and simplify the mask process, the black matrix can be omitted, and the common electrode can be formed to serve as a black matrix.

[0217] In addition, when the display panel 2000 is a liquid crystal display panel, the display device may further include a backlight unit that provides light from a rear surface of the display panel 2000 .

[0218] That is to say, if Figure 13 As shown, the light path control member is disposed below the liquid crystal panel and above the backlight unit 3000 , and the light path control member may be disposed between the backlight unit 3000 and the display panel 2000 .

[0219] Or, as Figure 14 As shown, when the display panel 2000 is an organic light emitting diode panel, the light path control member can be formed on the organic light emitting diode panel. That is, when the surface of the organic light emitting diode panel viewed by the user is defined as the upper part of the organic light emitting diode panel, the light path control member can be provided on the organic light emitting diode panel. The display panel 2000 may include a self-luminous element that does not require a separate light source. In the display panel 2000, a thin film transistor may be formed on the first substrate 2100, and an organic light emitting element in contact with the thin film transistor may be formed. The organic light emitting element 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 configured to serve as an encapsulation substrate for encapsulation may be further included on the organic light emitting element.

[0220] That is, light emitted from the display panel 2000 or the backlight unit 3000 may move from the second substrate 120 of the light path control member to the first substrate 110 .

[0221] In addition, although not shown in the drawings, a polarizing plate may be further provided between the light path control member 1000 and the display panel 2000. The polarizing plate may be a linear polarizing plate or a polarizing plate for preventing external light reflection. 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 for preventing external light reflection.

[0222] In addition, an additional functional layer 1300, such as an anti-reflection layer or an anti-glare layer, may be further provided on the light path control member 1000. Specifically, 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 adhered to the first substrate 110 of the light path control member via an adhesive layer. In addition, a release film may be further provided on the functional layer 1300 to protect the functional layer.

[0223] In addition, a touch panel may be further provided between the display panel and the light path control member.

[0224] Although the drawings show that the light path control member is arranged at the upper part of the display panel, the embodiments are not limited thereto, and the light path control member can be arranged at various positions, such as at a position where light can be adjusted, i.e., at the lower part of the display panel, between the second substrate and the first substrate of the display panel, etc.

[0225] In addition, in the drawings, the light conversion portion of the light path control member according to the embodiment is shown in a direction parallel to or perpendicular to the outer surface of the second substrate. However, the light conversion portion can be formed to be inclined at a predetermined angle from the outer surface of the second substrate. Therefore, the occurrence of moiré between the display panel and the light path control member can be reduced.

[0226] Reference Figures 15 to 17 , the light path controlling member according to the embodiment can be applied to various display devices.

[0227] Reference Figures 15 to 17 , the light path controlling member according to the embodiment can be applied to a display device that displays an image.

[0228] For example, Figure 15 As shown, when no power is applied to the light path control member, the accommodation portion functions as a light shielding portion, so that the display device is driven in the light shielding mode, and as shown in FIG. Figure 16 As shown, when power is applied to the light path control member, the accommodation portion functions as a light transmitting portion, so that the display device can be driven in the open mode.

[0229] Therefore, the user can easily drive the display device in the privacy mode or the normal mode according to the application of power.

[0230] Light emitted from the backlight unit or the self-luminous device may move from the first substrate to the second substrate. Alternatively, light emitted from the backlight unit or the self-luminous device may also move from the second substrate to the first substrate.

[0231] In addition, refer to Figure 17 , a display device using the light path control member according to the embodiment can also be used inside a vehicle.

[0232] For example, a display device including the light path control member according to the embodiment can display video confirmation information of the vehicle and a moving route of the vehicle.The display device can be provided between a driver's seat and a passenger seat of the vehicle.

[0233] Furthermore, the light path control member according to the embodiment may be applied to an instrument panel that displays the speed, engine, warning signal, etc. of a vehicle.

[0234] In addition, the light path controlling member according to the embodiment may be applied to a front glass (FG) or left and right window glasses of a vehicle.

[0235] 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. In addition, those skilled in the art may combine or modify the features, structures, and effects shown in each embodiment for other embodiments. Therefore, it should be understood that such combinations and modifications are included within the scope of the present invention.

[0236] Furthermore, the above primarily describes the embodiments, but these embodiments are merely illustrative and are not intended to limit the present invention. Those skilled in the art will appreciate that various variations and applications not described above may be made without departing from the essential features of the embodiments. For example, each component specifically shown in the embodiments may be modified. Furthermore, it should be understood that differences associated with such variations and applications are within the scope of the present invention as defined by the appended claims.

Claims

1. A light path control component, comprising: 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; as well as a light conversion unit disposed between the first electrode and the second electrode, The light conversion portion includes partition walls and receiving portions that are alternately arranged. The light emitted from the light source is transmitted toward the first substrate and the second substrate. wherein light moves from the first substrate to the second substrate, wherein the light transmittance of the receiving portion changes according to the application of voltage, wherein the receiving portion comprises a dispersion and light conversion particles dispersed in the dispersion, wherein a contact surface between the partition wall portion and the accommodation portion has an inclination angle with respect to a reference axis in a direction perpendicular to the upper surface of the first substrate, Wherein, the inclination angle is 1° to 10°, wherein the contact surface is inclined in such a manner that the width of the partition wall portion increases while extending in the direction of movement of light, wherein the contact surface is inclined in such a manner that the width of the accommodation portion decreases while extending in the moving direction of the light, wherein the partition wall portion includes a first partition wall portion defined as a region between the second electrode and the accommodation portion and a second partition wall portion defined as a region between the first partition wall portion and the first electrode, The surface resistance of the first partition wall portion is smaller than the surface resistance of the second partition wall portion.

2. The light path control member according to claim 1, wherein A refractive index of the partition wall portion and a refractive index of the accommodation portion are different from each other.

3. The light path control member according to claim 1, wherein The refractive index of the partition wall portion is 1.36 to 1.64, The refractive index of the receiving portion is 1.42 to 1.

45. Here, within the above range, the refractive index of the partition wall portion is greater than the refractive index of the accommodation portion.

4. The light path control member according to claim 1, wherein An incident angle of first light moving in a direction from the partition wall portion toward the accommodation portion is different from an incident angle of second light moving in a direction from the accommodation portion toward the partition wall portion.

5. The light path control member according to claim 4, wherein An incident angle of the second light is greater than an incident angle of the first light. The light path control member according to claim 1 , wherein: The width of the lower surface of the partition wall portion is different from the width of the lower surface of the accommodation portion.

7. The light path control member according to claim 1, wherein The maximum width of the accommodation portion is 10% to 40% of the sum of the width of the accommodation portion and the width of the partition wall portion. The maximum width of the partition wall portion is 60% to 90% of the sum of the width of the accommodation portion and the width of the partition wall portion.

8. The light path control member according to claim 1, wherein The volume resistance of the second partition wall portion is greater than the volume resistance of the first partition wall portion.

9. The light path control member according to claim 1, in, The second partition wall portion includes a first portion close to the first partition wall portion and a second portion close to the first electrode, wherein the surface resistance of the first partition wall portion and the second portion of the second partition wall portion is smaller than the surface resistance of the first portion of the second partition wall portion, The volume resistance of the first portion of the second partition wall portion is greater than the volume resistance of the second portion of the first partition wall portion and the second portion of the second partition wall portion.

10. A display device comprising: Display panel; as well as A light path control member is provided on the display panel. Wherein, the light path control component 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, The light conversion portion includes partition walls and receiving portions that are alternately arranged. The light emitted from the light source is transmitted toward the first substrate and the second substrate. wherein light moves from the first substrate to the second substrate, wherein the light transmittance of the receiving portion changes according to the application of voltage, wherein the receiving portion comprises a dispersion and light conversion particles dispersed in the dispersion, wherein a contact surface between the partition wall portion and the accommodation portion has an inclination angle with respect to a reference axis in a direction perpendicular to the upper surface of the first substrate, Wherein, the inclination angle is 1° to 10°, wherein the contact surface is inclined in such a manner that the width of the partition wall portion increases while extending in the direction of movement of light, wherein the contact surface is inclined in such a manner that the width of the accommodation portion decreases while extending in the moving direction of the light, wherein the light emitted from the light source is transmitted toward the first substrate and the second substrate, wherein light moves from the first substrate to the second substrate, wherein the partition wall portion includes a first partition wall portion defined as a region between the second electrode and the accommodation portion and a second partition wall portion defined as a region between the first partition wall portion and the first electrode, The surface resistance of the first partition wall portion is smaller than the surface resistance of the second partition wall portion.

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