KR100898102B1 - Optical member and method of manufacturing the same - Google Patents

Abstract

The optical member includes a first base film and a light control film. The light control film includes a plurality of air tunnels disposed on the first base film and arranged in a direction parallel to the first base film. Each air tunnel may have a triangular prism shape. Thus, the optical characteristics of the optical member are improved.

Description

Optical member and method of manufacturing the same {Optical Member And Method of Manufacturing The Same}

The present invention relates to an optical member and a method for manufacturing the same, and more particularly, to an optical member and a method for manufacturing the optical properties improved.

The flat panel display device is widely used in various fields because of its thin thickness, low driving voltage, and light weight. One of the flat panel display devices includes a liquid crystal display panel that displays an image using light generated from the outside.

In order to apply the externally generated light to the liquid crystal display panel, optical characteristics such as luminance uniformity and front luminance are required. In order to improve the said optical characteristic, optical sheets, such as a prism sheet, a diffusion sheet, and a light guide plate, are used.

In general, as the number of the optical sheets increases, the optical characteristics are improved. However, as the number of optical sheets increases, assemblability deteriorates and manufacturing costs increase.

In addition, the adjacent optical sheets are partially in close contact with each other, thereby causing local defects, and a defect caused by scratching occurs at a site where the adjacent optical sheets contact each other.

In addition, a moiré defect may occur in the alignment process of the optical sheets, and the viewing angle of the liquid crystal display device is limited due to the structural characteristics of the liquid crystal display panel.

Therefore, the technical problem to be solved in the present invention is to solve this conventional problem, an object of the present invention to provide an optical member with improved optical properties.

Another object of the present invention is to provide a method of manufacturing the optical member.

Optical member according to an embodiment of the present invention described above includes a first base film and a light control film. The light control film includes a plurality of air tunnels disposed on the first base film and arranged in a direction parallel to the first base film.

Each air tunnel may have a triangular prism shape.

The light control film further includes a plurality of prism patterns attached to an upper surface of the first base film and defining side surfaces of the air tunnels, and an organic layer covering upper edges of the prism patterns to define upper surfaces of the air tunnels. It may include.

The depth of the virtual edge formed by extending both sides of each prism pattern may be smaller than the thickness of the organic layer.

Side edges of the respective air tunnels may be rounded. The light control film may further include a curved portion formed at a boundary portion between the prism patterns and the organic layer in a direction parallel to the air tunnels to diffuse light.

The side edges of the air tunnels may be sharp edge diffusion edges.

The light control film may further include a diffusion part disposed between adjacent prism patterns to diffuse light.

The diffusion part includes a plurality of hemispherical protrusions, a plurality of hemispherical recesses, a plurality of protrusions having a pyramid shape, a plurality of recesses having a pyramid shape, an auxiliary prism extending in the same direction as the prism patterns, and the like. can do.

The organic layer may include the same material as the prism patterns. The organic layer may include a photocurable material.

The light control film may further include a plurality of air capsules disposed between adjacent air tunnels. The air capsules may be arranged along the side edges of the adjacent air tunnels.

The optical member may further include a second base film disposed on the light control film to protect the light control film.

The optical member may further include a diffusion layer including diffusion particles and a resin attaching the diffusion particles to an upper surface of the second base film.

The optical member may further include upper prism patterns disposed on the second base film and extending in a direction crossing the air tunnels.

The cross section of the air tunnel may have a horseshoe shape.

The light control film may further include a diffusion part disposed between adjacent prism patterns to diffuse light, and the diffusion part may include an auxiliary prism extending in the same direction as the prism patterns.

The optical member may further include light control patterns disposed on the second base film and extending in a direction crossing the air tunnels and having a horseshoe shape in cross section.

The optical member is disposed on the second base film and disposed on the second light control film and the second light control film including a plurality of second air tunnels arranged in a direction parallel to the second base film. It may further include a third base film to protect the second light control film. The optical member may have a multilayer structure including four or more base films and three or more light control films disposed between the base films.

In the method of manufacturing an optical member according to another embodiment of the present invention described above, first, a plurality of prism patterns extending in parallel directions to each other are formed on the first base film. Subsequently, a coating layer is coated on the second base film. Thereafter, the second base film is aligned on the base substrate such that the coating layer faces the prism patterns. Subsequently, the second base film is pressed toward the first base film to insert an upper portion of the prism patterns into the coating layer. Subsequently, the coating layer is cured to form an organic film.

The method of manufacturing the optical member may further include forming a curved portion at a boundary between the prism patterns and the coating layer by diffusing a portion of the coating layer to the sides of the prism patterns by surface tension.

The method of manufacturing the optical member may further include irradiating light to the coated coating layer.

In the method of manufacturing the optical member, the forming of the prism patterns may form a diffusion part between adjacent prism patterns.

The coating layer may include a photocurable material.

The prism patterns may include a plurality of recesses therein.

According to the present invention as described above, the air tunnel is formed in the light control film is improved the front luminance of the liquid crystal display device. In addition, since the upper edges of the prism patterns are not exposed to the outside, scratches are prevented from occurring in other optical sheets.

In addition, the optical member may include the diffusion unit or the air capsule to improve luminance uniformity of the liquid crystal display. In addition, the additional diffusion sheet is omitted, which simplifies the assembly process and reduces the manufacturing cost.

Hereinafter, exemplary embodiments of the display device of the present invention will be described in detail with reference to the drawings. As the inventive concept allows for various changes and numerous embodiments, particular embodiments will be illustrated in the drawings and described in detail in the text. However, it is not intended to limit the present invention to the specific disclosed form, it should be understood to include all modifications, equivalents, and substitutes included in the spirit and scope of the present invention. In describing the drawings, similar reference numerals are used for similar elements. In the accompanying drawings, the dimensions of the structure is shown in an enlarged scale than actual for clarity of the present invention. Terms such as first and second may be used to describe various components, but the components should not be limited by the terms. The terms are used only for the purpose of distinguishing one component from another. For example, without departing from the scope of the present invention, the first component may be referred to as the second component, and similarly, the second component may also be referred to as the first component. Singular expressions include plural expressions unless the context clearly indicates otherwise.

In this application, the terms "comprise" or "have" are intended to indicate that there is a feature, number, step, action, component, part, or combination thereof described on the specification, and one or more other features. It is to be understood that the present invention does not exclude the possibility of the presence or the addition of numbers, steps, operations, components, parts, or combinations thereof. In addition, unless otherwise defined, all terms used herein, including technical or scientific terms, have the same meaning as commonly understood by one of ordinary skill in the art. Terms such as those defined in the commonly used dictionaries should be construed as having meanings consistent with the meanings in the context of the related art, and, unless expressly defined in this application, are to be interpreted in ideal or overly formal meanings. It doesn't work.

1 is an exploded perspective view showing a liquid crystal display according to a first embodiment of the present invention.

Referring to FIG. 1, the liquid crystal display includes a light source module 10, an optical member 20, and a liquid crystal display panel 30.

The light source module 10 supplies light toward the optical member 20. The light source module 10 may include a direct type light source module or a side light guide type light source module.

When the light source module 10 is a direct type light source module, a plurality of light sources (not shown) such as a cold cathode ray tube fluorescent lamp, a flat fluorescent lamp, and a light emitting diode (LED) may be arranged on a plane. Can be.

When the light source module 10 is a side light guide type light source module, a light source such as a fluorescent lamp or a light emitting diode and a light guide plate (not shown) for guiding the light generated by the light source toward the optical member 20 may be included. have.

The optical member 20 is disposed on the light source module 10 to improve the characteristics of the light generated by the optical member 20. In this embodiment, the optical member 20 improves the front luminance, luminance uniformity, and the like of the light. In this embodiment, the optical member 20 will be described later with reference to FIG.

In another embodiment, the liquid crystal display may further include various optical sheets such as a diffusion plate, a diffusion sheet, a prism sheet, a semi-transparent film, and a second base film.

The liquid crystal display panel 30 is disposed on the optical member 20, and transmits the light passing through the optical member 20 to a liquid crystal layer interposed between two substrates to display an image. In this case, various passive display panels such as an electrophoretic display panel may be applied instead of the liquid crystal display panel 30.

2 is a perspective view illustrating the optical member illustrated in FIG. 1, and FIG. 3 is an enlarged perspective view of portion A of FIG. 2.

2 and 3, the optical member 20 includes a first base film 201, a light control film 210, and a second base film 202.

The first base film 201 has a film shape and includes a transparent synthetic resin. For example, the synthetic resin includes polyethylene terraphthalate, methacryl resin, acrylic resin, polycarbonate resin, polyester resin, vinyl chloride resin and the like. In this embodiment, the first base film 201 includes polyethylene terraphthalate.

The light control film 210 is disposed on the first base film 201 and includes a plurality of air tunnels 220 arranged in a direction parallel to the first base film 201.

In the present embodiment, the air tunnels 220 of the light control film 210 are formed by combining a plurality of prism patterns 212 and the organic film 214, and has a triangular cross-sectional shape. In this case, each of the air tunnels 220 may have a cross-sectional shape such as an isosceles triangle, a right triangle, a trapezoidal shape, and the like. In another embodiment, each air tunnel 220 may have a cross-sectional shape, such as polygon, horseshoe, semicircle, round.

The prism patterns 212 are attached to an upper surface of the first base film and define side surfaces of the air tunnels 220.

The prism patterns 212 include a transparent synthetic resin. In the present embodiment, the prism patterns 212 include a photocurable material, a thermosetting material, and the like, and include a material different from the first base film 201. In this case, the prism patterns 212 may include the same material as the first base film 201. The prism patterns 212 are exposed at the side surfaces of the air tunnels 220 so that light is refracted at the interface between the prism patterns 212 and the air tunnels 220. Therefore, the light incident from the first base film 201 is guided in a direction perpendicular to the first base film 201 to improve the front luminance of the liquid crystal display.

The organic layer 214 covers upper edges of the prism patterns 212 to define top surfaces of the air tunnels 220. In the present exemplary embodiment, the organic layer 214 includes the same material as the prism patterns 212 and is integrally formed.

The depth d of the virtual edge extending from both sides of each prism pattern 212 is smaller than the thickness of the organic layer 214.

In the present embodiment, the prism patterns 210 are integrally formed with the first base film 201.

The second base film 202 is disposed on the organic layer 214 of the light control film 210 to protect the light control film 210. In the present embodiment, the second base film 202 includes the same material as the first base film 201. In another embodiment, the second base film 202 may be omitted.

The first base film 201, the light control film 210, and the second base film 202 are integrally formed.

4A through 8A are cross-sectional views illustrating a method of manufacturing the optical member illustrated in FIG. 3. 4A is a cross-sectional view illustrating the formation of the prism patterns 212 ′ on the first base film 201, and FIG. 4B is an image illustrating the prism patterns 212 ′ shown in FIG. 4A.

4A and 4B, a plurality of prism patterns 212 ′ are formed on the first base film 201 and extend in parallel to each other. The prism patterns 212 ′ may be formed on the first base film 201 through various methods such as roller, press, printing, and etching.

5 is a cross-sectional view illustrating a step of coating a coating layer 214 ′ on the second base film 202.

Referring to FIG. 5, the coating layer 214 ′ is not cured and has fluidity. For example, the coating layer 214 'includes a polyethylene resin including a photocurable material.

6 is a cross-sectional view showing a step of irradiating light to the coating layer.

Referring to FIG. 6, the coating layer (214 ′ of FIG. 5) coated on the second base film 202 may be irradiated with ultraviolet rays to increase viscosity. In this embodiment, the intensity of the ultraviolet light is adjusted to have a gel form in which the coating layer 214 '' irradiated with ultraviolet light maintains fluidity.

In another embodiment, the solvent may be evaporated from the coating layer 214 ′ coated on the second base film 202 to have a gel form. When the coating layer 214 ′ coated on the second base film 202 has a highly viscous gel form, the step of irradiating ultraviolet rays may be omitted.

FIG. 7 is a cross-sectional view illustrating the step of aligning the second base film shown in FIG. 6 onto the first base film shown in FIG. 4.

Referring to FIG. 7, the second base film 202 is aligned on the base substrate 201 such that the coating layer 214 ″ irradiated with ultraviolet rays faces the prism patterns 212 ′.

In the present exemplary embodiment, since the UV-irradiated coating layer 214 ″ is highly viscous, the side edges of the air tunnels 220 have acute angles because they do not diffuse toward the side surfaces of the prism patterns 212 ′. .

Subsequently, the second base film 202 is pressed toward the base substrate 201 to insert the upper portions of the prism patterns 212 ′ into the UV-irradiated coating layer 214 ″. For example, it can pressurize using mechanisms, such as a press and a roller.

8A is a cross-sectional view illustrating that the prism patterns illustrated in FIG. 7 are combined with a coating layer.

Referring to FIGS. 7 and 8A, the organic layer 214 may be formed by irradiating the UV-irradiated coating layer 214 ″ with ultraviolet rays.

The depth at which each prism pattern 212 ′ is inserted into the UV-irradiated coating layer 214 ″ is smaller than the thickness of the UV-irradiated coating layer 214 ″. That is, the depth d of the pseudo phase edge formed by extending both sides of each prism pattern 212 is smaller than the thickness h of the organic layer 214.

Accordingly, the air tunnels 220 having side surfaces defined by the prism patterns 212 and an upper surface defined by the organic layer 214 are formed.

According to the present embodiment as described above, the air tunnels 220 are formed in the light control film 210 to improve the front luminance of the liquid crystal display. In addition, since the upper edges of the prism patterns 212 are not exposed to the outside, scratches are prevented from occurring in other optical sheets.

8B is a cross-sectional view illustrating an optical member according to another exemplary embodiment of the present disclosure. In the present embodiment, the rest of the components except for the air tunnels 226 are the same as the first embodiment, and overlapping description thereof will be omitted.

Referring to FIG. 8B, the optical member includes a first base film 201, a light control film 216, and a second base film 202.

The light control film 216 is disposed on the first base film 201 and includes a plurality of air tunnels 226 arranged in a direction parallel to the first base film 201. In this embodiment, the side edge of each air tunnel 226 has a sharp shape.

In the present embodiment, the air tunnels 226 of the light control film 216 are formed by combining a plurality of prism patterns 212, the organic layer 214, and the diffusion edge portion 226a.

The organic layer 214 covers upper edges of the prism patterns 212 to define top surfaces of the air tunnels 226. In the present exemplary embodiment, the organic layer 214 includes the same material as the prism patterns 212 and is integrally formed. In another embodiment, the organic layer 214 may include an adhesive resin that is a different material from the prism patterns 212.

The diffusion edge part 226a is formed at a boundary between the prism patterns 212 and the organic layer 214 in a direction parallel to the air tunnels 226 to diffuse light.

In the present embodiment, substantially the same as the manufacturing method of the optical member shown in Figures 4a to 8a, but in the step of irradiating the ultraviolet light of Figure 6, the diffusion edge portion 226a to each air tunnel 226 In order to form, the irradiation amount of ultraviolet rays is increased than in the case of Example 1 to increase the viscosity of the coating layer.

9 is a cross-sectional view showing an optical member according to a second embodiment of the present invention. In the present embodiment, the rest of the components except the diffusion layer is the same as the first embodiment, and overlapping description is omitted.

Referring to FIG. 9, the optical member includes a first base film 201, a light control film 210, a second base film 202, and a diffusion layer 230.

The diffusion layer 230 is attached on the second base film 202 and includes a plurality of diffusion particles 232 and a resin 234. The resin 234 attaches the diffusion particles 232 to the second base film 202. In another embodiment, the diffusion particles 232 may be disposed inside the second base film 202 or the first base film 201.

According to the present embodiment as described above, the optical member includes the diffusion layer 230 to improve the luminance uniformity of the liquid crystal display. In addition, the additional diffusion sheet is omitted, which simplifies the assembly process and reduces the manufacturing cost.

10A is a perspective view illustrating an optical member according to a third exemplary embodiment of the present invention, and FIGS. 10B and 10C are images illustrating the optical member illustrated in FIG. 10A. In the present embodiment, except for the light control film, the remaining components are the same as in Example 1, the overlapping description is omitted.

10A to 10C, the optical member includes a first base film 201, a light control film 310, and a second base film 202.

The light control film 310 is disposed on the first base film 201 and includes a plurality of air tunnels 320 arranged in a direction parallel to the first base film 201. In this embodiment, the side edge of each air tunnel 320 has a round shape.

In the present embodiment, the air tunnels 320 of the light control film 310 are formed by combining a plurality of prism patterns 212, the organic layer 314 and the curved portion 316.

The organic layer 314 covers upper edges of the prism patterns 212 to define top surfaces of the air tunnels 320. In the present embodiment, the organic layer 314 includes the same material as the prismatic patterns 312 and is integrally formed.

The depth d of the virtual edge extending from both sides of each prism pattern 312 is smaller than the thickness of the organic layer 314.

The curved portion 316 is formed at a boundary between the prism patterns 312 and the organic layer 314 in a direction parallel to the air tunnels 320 to diffuse light.

In the present embodiment, the prism patterns 212, the organic layer 314, and the curved portion 316 include the same material and are integrally formed.

11 to 13 are cross-sectional views illustrating a method of manufacturing the optical member illustrated in FIG. 10A.

First, as shown in FIG. 4A, prismatic patterns 212 ′ are formed on the first base film 201.

11 is a cross-sectional view illustrating a step of coating a coating layer 314 ′ on the second base film 202.

Referring to FIG. 11, the coating layer 314 ′ is not cured and has fluidity. In this embodiment, the step of irradiating a separate light as in FIG. 6 is omitted.

FIG. 12 is a cross-sectional view illustrating the step of aligning the second base film shown in FIG. 11 onto the first base film shown in FIG. 4.

Referring to FIG. 12, the second base film 202 is aligned on the base substrate 201 such that the coating layer 314 ′ faces the prism patterns 212 ′.

Subsequently, the second base film 202 is pressed toward the base substrate 201 to insert an upper portion of the prism patterns 212 ′ into the coating layer 314 ′.

In this embodiment, the coating layer 314 ′ is low in viscosity. Therefore, it may diffuse toward the side surfaces of the prism patterns 212 ′.

FIG. 13 is a cross-sectional view illustrating the prism patterns illustrated in FIG. 12 combined with a coating layer.

12 and 13, a portion of the coating layer 314 ′ is diffused to a position corresponding to the diffusion portion 316 by surface tension with the prism patterns 212.

Subsequently, ultraviolet rays are irradiated onto the coating layer 314 ′ to form the organic layer 314 and the diffusion part 316.

The depth at which each prism pattern 312 ′ is inserted into the coating layer 314 ′ is smaller than the thickness of the coating layer 314 ′. That is, the depth d of the virtual edge formed by extending both sides of each prism pattern 212 is smaller than the thickness h of the organic layer 214.

Accordingly, the air tunnels 320 having side surfaces defined by the prism patterns 212, rounded edges defined by the diffusion part 316, and top surfaces defined by the organic layer 214. Is formed.

According to the present embodiment as described above, the light control film 310 includes the curved portion 316, the side edge of each air tunnel 320 is rounded. In addition, since light is diffused using the curved portion 316 without a separate diffusion agent, luminance uniformity is improved without deterioration of luminance.

14A is a perspective view illustrating an optical member according to a fourth exemplary embodiment of the present invention, and FIGS. 14B and 14C are images illustrating the optical member illustrated in FIG. 14A. In the present embodiment, the rest of the components except for the air capsules are the same as the first embodiment, and overlapping description is omitted.

14A to 14C, the optical member includes a first base film 201, a light control film 410, and a second base film 202.

The light control film 410 is disposed on the first base film 201 and includes a plurality of air tunnels 220 arranged in a direction parallel to the first base film 201.

In the present exemplary embodiment, the air tunnels 220 of the light control film 410 are formed by combining a plurality of prism patterns 412 and the organic layer 414.

A plurality of air capsules 416 are formed on each of the prism patterns 412. In the present embodiment, the air capsules 416 are disposed between the prism patterns 412 and the organic layer 414. For example, the air capsules 416 may have a hemispherical shape, a polygonal pyramid shape, a hexahedral shape, or the like.

A portion of the light incident on the optical member is diffused by the air capsules 416 to improve luminance uniformity.

15A to 19A are perspective views illustrating a method of manufacturing the optical member shown in FIG. 14A. FIG. 15A is a perspective view illustrating forming prismatic patterns 412 ′ on the first base film 201, and FIG. 15B is an image illustrating the prism patterns 412 ′ illustrated in FIG. 15A.

15A and 15B, each prism pattern 412 ′ has a shape in which an upper portion is cut, and a plurality of recesses 416 ′ are formed on an upper surface of each prism pattern 412 ′.

In this embodiment, the recesses 416'are disposed adjacent to each other. In this case, the recesses 416 ′ may be spaced apart from each other.

16 is a cross-sectional view illustrating a step of coating a coating layer 414 ′ on the second base film 202.

Referring to FIG. 16, the coating layer 414 ′ is not cured and has fluidity.

17 is a cross-sectional view showing a step of irradiating ultraviolet rays to the coating layer shown in FIG.

Referring to FIG. 17, ultraviolet rays are irradiated to the coating layer (414 ′ of FIG. 16) coated on the second base film 202 to increase viscosity.

FIG. 18 is a cross-sectional view illustrating aligning the second base film shown in FIG. 17 onto the first base film shown in FIG. 15.

Referring to FIG. 18, the second base film 202 is aligned on the base substrate 201 such that the coating layer 414 ″ faces the prism patterns 412 ′. In this case, the distance between the base substrate 201 and the second base film 202 is equal to the sum of the height Tp of the prism patterns 412 ′ and the thickness h of the coating layer 414 ″. Do.

Subsequently, the second base film 202 is pressed toward the base substrate 201 to insert an upper portion of the prism patterns 412 'into the coating layer 414' '.

19A is a cross-sectional view showing that the prism patterns shown in FIG. 18 are combined with a coating layer, and FIGS. 19B to 19D are images showing the optical film shown in FIG. 19A.

18 to 19D, a portion of the coating layer 414 ″ covers an upper portion of the recesses 416 ′ formed on the prism patterns 412 ′ to cover the air capsules 416. To form.

The depth d of each prism pattern 412 ′ into the coating layer 414 ″ is smaller than the thickness h of the coating layer 414 ″. Therefore, the distance Tf between the bottom surface of each prism pattern 412 is lower than the height Tp of the prism patterns 412 'before pressing.

Subsequently, ultraviolet rays are irradiated onto the coating layer 414 ″ to form the organic layer 414.

Accordingly, the air tunnels 320 having side surfaces defined by the prism patterns 412 and the top surface defined by the organic layer 414, and the recesses formed on the top surfaces of the prism patterns 412. The air capsules 416 are formed by defining the side and bottom surfaces by the fields 416 ′ and the top surface by the organic layer 414.

According to the present embodiment as described above, the light control film 410 including the air capsules 416, can diffuse the light without a separate diffuser. Therefore, the luminance uniformity is improved without lowering the luminance.

20A is a cross-sectional view illustrating an optical member according to a fifth exemplary embodiment of the present invention, and FIGS. 20B and 20C are images illustrating the optical member illustrated in FIG. 20A. In the present embodiment, the remaining components except for the diffusion portion are the same as in the first embodiment, and overlapping description thereof will be omitted.

20A to 20C, the light control film 510 includes prism patterns 512, diffusion parts 515, and an organic layer 514.

The diffuser 515 is disposed between adjacent prism patterns 512 to diffuse light.

In the present embodiment, the diffusion portion 515 includes a plurality of hemispherical protrusions 516.

A plurality of air tunnels 520 are defined by side surfaces of the prism patterns 512, an upper surface of the diffusion part 515, and a lower surface of the organic layer 514.

Light incident to the optical member is guided in the front direction at the boundary between the air tunnels 520 and the boundary between the prism patterns 512, and the center and the diffusion parts 515 of the air tunnels 520. Diffuse at the interface.

FIG. 21A is a cross-sectional view illustrating an optical member according to a sixth exemplary embodiment of the present invention, FIG. 21B is an image showing the prism patterns of FIG. 21A, and FIGS. 21C and 21D are images showing the optical member of FIG. 21A. In the present embodiment, the remaining components except for the diffusion portion are the same as in the fifth embodiment, and overlapping description is omitted.

21A to 21D, the light control film 530 includes prism patterns 512, diffusion parts 535, and an organic layer 534.

The diffusion part 535 is disposed between adjacent prism patterns 512 to diffuse light.

In the present embodiment, the diffusion portion 535 includes a plurality of hemispherical recesses 536.

A plurality of air tunnels 540 are defined by side surfaces of the prism patterns 512, a bottom surface of the diffusion part 535, and a bottom surface of the organic layer 534.

22A is a perspective view illustrating an optical member according to a seventh embodiment of the present invention, and FIGS. 22B and 22C are images illustrating the optical member illustrated in FIG. 22A. In the present embodiment, the remaining components except for the diffusion portion are the same as in the fifth embodiment, and overlapping description thereof will be omitted.

22A to 22C, the light control film 550 includes prism patterns 552, diffusion parts 565, and an organic layer 554.

The diffuser 565 is disposed between adjacent prism patterns 552 to diffuse light.

In the present embodiment, the diffusion portion 565 includes a plurality of pyramidal protrusions 566.

A plurality of air tunnels 560 are defined by side surfaces of the prism patterns 552, an upper surface of the diffusion part 565, and a lower surface of the organic layer 554.

22D to 22F are images illustrating an optical member according to another exemplary embodiment of the present invention. In the present embodiment, other components except for the diffusion part are the same as in the seventh embodiment, and overlapping description thereof will be omitted.

22D to 22F, the diffusion part includes pyramid-shaped air capsules disposed between adjacent air tunnels.

Fig. 23 is a perspective view showing an optical member according to Embodiment 8 of the present invention. In the present embodiment, the remaining components except for the diffusion portion are the same as in the seventh embodiment, and overlapping description thereof will be omitted.

Referring to FIG. 23, the light control film 570 includes prism patterns 572, diffusion parts 585, and an organic layer 574.

 The diffusion part 585 is disposed between adjacent prism patterns 572 to diffuse light.

In the present embodiment, the diffusion portion 585 includes a plurality of pyramidal recesses 586.

A plurality of air tunnels 580 are defined by side surfaces of the prism patterns 572, an upper surface of the diffusion part 585, and a lower surface of the organic layer 574.

24A is a perspective view illustrating an optical member according to a ninth embodiment of the present invention, and FIGS. 24B and 24C are images illustrating the optical member illustrated in FIG. 24A. In the present embodiment, the remaining components except for the diffusion portion are the same as in the fifth embodiment, and overlapping description thereof will be omitted.

24A to 24C, the light control film 620 includes prism patterns 622, diffusion parts 635, and an organic layer 624.

 The diffusion part 635 is disposed between adjacent prism patterns 622 to diffuse light.

In the present embodiment, the diffusion portion 635 includes a plurality of prismatic protrusions 636.

A plurality of air tunnels 630 are defined by side surfaces of the prism patterns 622, an upper surface of the diffusion part 635, and a lower surface of the organic layer 624.

24D and 24E are images illustrating an optical member according to another exemplary embodiment of the present invention. In the present embodiment, other components except for the diffusion part are the same as in the ninth embodiment, and overlapping description thereof will be omitted.

24D and 24E, the diffusion part includes a plurality of auxiliary air tunnels disposed between adjacent air tunnels. The auxiliary air tunnels extend in the same direction as the air tunnels and have a triangular cross section.

25A is a perspective view illustrating an optical member according to a tenth embodiment of the present invention, and FIGS. 25B and 25C are images illustrating the optical member illustrated in FIG. 25A. In the present embodiment, other components except for the diffusion part are the same as in the ninth embodiment, and overlapping description thereof will be omitted.

25A to 25C, the light control film 620 ′ includes prism patterns 622, diffusion parts 635 ′, and an organic layer 624.

The diffuser 635 ′ is disposed between adjacent prism patterns 622 to diffuse light.

In this embodiment, the diffusion portion 635 'includes one prismatic protrusion 636'.

A plurality of air tunnels 630 are defined by side surfaces of the prism patterns 622, an upper surface of the diffusion 635 ′, and a lower surface of the organic layer 624.

25D and 25E are images illustrating an optical member according to another exemplary embodiment of the present invention. In the present embodiment, the remaining components except for the diffusion portion are the same as in the tenth embodiment, and overlapping description thereof will be omitted.

25D and 25E, the diffusion part includes an auxiliary air tunnel disposed between adjacent air tunnels. In this embodiment, one auxiliary air tunnel is disposed between each adjacent air tunnel, and the auxiliary air tunnel has a triangular cross section.

FIG. 26A is a perspective view illustrating an optical member according to an eleventh embodiment of the present invention, and FIGS. 26B and 26C are images illustrating the optical member illustrated in FIG. 26A. In the present exemplary embodiment, the remaining components except for the upper prism patterns 242 are the same as those of the third exemplary embodiment, and thus redundant descriptions thereof will be omitted.

26A to 26C, the optical member includes a first base film 201, a light control film 310, a second base film 202, and upper prism patterns 242.

The light control film 310 is disposed on the first base film 201 and includes a plurality of air tunnels 320 arranged in a direction parallel to the first base film 201. In this embodiment, the side edge of each air tunnel 320 has a round shape. At this time, the side edge of each air tunnel 320 may have a triangular shape, sharp shape, and the like.

The upper prism patterns 242 are disposed on the second base film 202 and are arranged in a direction intersecting an extension direction of the air tunnels 320. For example, an extension direction of the upper prism patterns 242 may be substantially perpendicular to an extension direction of the air tunnels 320. In the present embodiment, the upper prism patterns 242 include the same material as the prism patterns 212. In this case, the upper prism patterns 242 may include a material different from the prism patterns 212.

According to the present exemplary embodiment as described above, the front luminance is improved by combining the air tunnels 320 and the upper prism patterns 242.

27A is a perspective view illustrating an optical member according to a twelfth embodiment of the present invention, and FIGS. 27B and 27C are images illustrating the optical member illustrated in FIG. 27A. In the present embodiment, the rest of the components except for the light control patterns 252 are the same as in the eleventh embodiment, and overlapping description thereof will be omitted.

27A through 27C, the light control patterns 252 are disposed on the second base film 202 and extend in a direction crossing the air tunnels 320. For example, the light control patterns 252 have a horseshoe shape in cross section.

According to the present embodiment as described above, the viewing angle is improved by the combination of the light control pattern 252 and the upper prism patterns 242 having the horseshoe shape.

28A is a perspective view illustrating an optical member according to a thirteenth embodiment of the present invention, and FIGS. 28B and 28C are images illustrating the optical member illustrated in FIG. 28A. In the present embodiment, the rest of the components except for the light control film 330 is the same as in the eleventh embodiment and overlapping description is omitted.

Referring to FIGS. 28A to 28C, the light control film 330 is disposed on the first base film 201 and arranged in a direction parallel to the first base film 201. 340.

In this embodiment, each air tunnel 340 has a horseshoe-shaped cross section, and an outer circumference is defined by adjacent prism patterns 335.

According to the present embodiment as described above, the viewing angle is improved by the combination of the air tunnel 340 and the upper prism patterns 242 of the horseshoe shape.

29A is a perspective view illustrating an optical member according to a fourteenth exemplary embodiment, and FIGS. 29B and 29C are images illustrating the optical member illustrated in FIG. 29A. In the present embodiment, the rest of the components except for the light control film 640 is the same as in the eleventh embodiment and overlapping description is omitted.

29A to 29C, the light control film 640 is disposed on the first base film 201, and a plurality of air tunnels arranged in a direction parallel to the first base film 201. 650.

The light control film 640 further includes a diffusion part 655 disposed between adjacent prism patterns 642 to diffuse light, and the diffusion part 655 is the same as the prism patterns 642. And an auxiliary prism 656 extending in the direction.

The optical properties of the optical member shown in Figure 29a was tested based on the Brightness Enhancement Film (BEF) of the US 3M. The measuring equipment used was TOPM BM7.

When the front luminance of 3M BEF was 100%, the luminance of the optical member according to the present embodiment was 127.8%, which showed a dramatic increase in luminance.

In the above embodiments, only one light control film disposed between two base films is disclosed. In another embodiment, the optical member is disposed on the second base film and the second light control film and the second light control film including a plurality of second air tunnels arranged in a direction parallel to the second base film It may further include a third base film disposed on the film to protect the second light control film. In addition, the optical member may have a multi-layered structure including four or more base films and three or more light control films disposed between the base films.

According to the present invention as described above, the air tunnel is formed in the light control film is improved the front luminance of the liquid crystal display device. In addition, since the upper edges of the prism patterns are not exposed to the outside, scratches are prevented from occurring in other optical sheets.

In addition, the optical member may include the diffusion unit or the air capsule to improve luminance uniformity of the liquid crystal display. In addition, the additional diffusion sheet is omitted, which simplifies the assembly process and reduces the manufacturing cost.

Although the detailed description of the present invention has been described with reference to the preferred embodiments of the present invention, those skilled in the art or those skilled in the art will have the idea of the present invention described in the claims to be described below. It will be understood that various modifications and variations can be made in the present invention without departing from the scope of the present invention.

1 is an exploded perspective view showing a liquid crystal display according to a first embodiment of the present invention.

FIG. 2 is a perspective view illustrating the optical member illustrated in FIG. 1.

3 is an enlarged perspective view of portion A of FIG. 2.

4A through 8A are cross-sectional views illustrating a method of manufacturing the optical member illustrated in FIG. 3.

8B is a cross-sectional view showing an optical member according to another embodiment of the present invention.

9 is a cross-sectional view showing an optical member according to a second embodiment of the present invention.

10A is a perspective view showing an optical member according to Embodiment 3 of the present invention.

10B and 10C are images illustrating the optical member illustrated in FIG. 10A.

11 to 13 are cross-sectional views illustrating a method of manufacturing the optical member illustrated in FIG. 10A.

14A is a perspective view showing an optical member according to Embodiment 4 of the present invention.

14B and 14C are images illustrating the optical member illustrated in FIG. 14A.

15A to 19A are perspective views illustrating a method of manufacturing the optical member shown in FIG. 14A.

19B to 19D are images illustrating an optical member according to another exemplary embodiment of the present invention.

20A is a sectional view showing an optical member according to a fifth embodiment of the present invention.

20B and 20C are images illustrating the optical member illustrated in FIG. 20A.

Fig. 21A is a sectional view of an optical member according to a sixth embodiment of the present invention.

FIG. 21B is an image illustrating the prism patterns of FIG. 21A.

21C and 21D are images illustrating the optical member of FIG. 21A.

22A is a perspective view of an optical member according to a seventh embodiment of the present invention.

22B and 22C are images illustrating the optical member illustrated in FIG. 22A.

22D to 22F are images illustrating an optical member according to another exemplary embodiment of the present invention.

Fig. 23 is a perspective view showing an optical member according to Embodiment 8 of the present invention.

24A is a perspective view of an optical member according to a ninth embodiment of the present invention.

24B and 24C are images illustrating the optical member illustrated in FIG. 24A.

24D and 24E are images illustrating an optical member according to another exemplary embodiment of the present invention.

25A is a perspective view of an optical member according to a tenth embodiment of the present invention.

25B and 25C are images illustrating the optical member illustrated in FIG. 25A.

25D and 25E are images illustrating an optical member according to another exemplary embodiment of the present invention.

Fig. 26A is a perspective view showing an optical member according to Embodiment 11 of the present invention.

26B and 26C are images illustrating the optical member illustrated in FIG. 26A.

27A is a perspective view of an optical member according to a twelfth embodiment of the present invention.

27B and 27C are images illustrating the optical member illustrated in FIG. 27A.

28A is a perspective view of an optical member according to a thirteenth embodiment of the present invention.

28B and 28C are images illustrating the optical member illustrated in FIG. 28A.

29A is a perspective view of an optical member according to Embodiment 14 of the present invention.

29B and 29C are images illustrating the optical member illustrated in FIG. 29A.

<Explanation of symbols for the main parts of the drawings>

201: first base film 202: second base film

210: light control film 212: prism pattern

214: organic film 214: coating layer

220: air tunnel 242: upper prism patterns

416: Air Capsule

Claims (32)

A first base film; And It includes a light control film disposed on the first base film and including a plurality of air tunnels arranged in a direction parallel to the first base film, The light control film may include a plurality of prism patterns attached to an upper surface of the first base film and defining side surfaces of the air tunnels, and an organic layer covering upper edges of the prism patterns to define upper surfaces of the air tunnels. More, Optical member, characterized in that the side edge of the air tunnel rounded. The optical member according to claim 1, wherein each air tunnel has a triangular prism shape. delete The optical member of claim 1, wherein a depth of a virtual edge formed by extending both sides of each prism pattern is smaller than a thickness of the organic layer. delete The optical member of claim 1, wherein the light control film further comprises a curved portion formed at a boundary between the prism patterns and the organic layer in a direction parallel to the air tunnels to diffuse light. delete The optical member of claim 1, wherein the light control film further comprises a diffusion part disposed between adjacent prism patterns to diffuse light. The optical member of claim 8, wherein the diffusion part comprises a plurality of hemispherical protrusions. A first base film; And It includes a light control film disposed on the first base film and including a plurality of air tunnels arranged in a direction parallel to the first base film, The light control film may include a plurality of prism patterns attached to an upper surface of the first base film and defining side surfaces of the air tunnels, and an organic layer covering upper edges of the prism patterns to define upper surfaces of the air tunnels. More, The light control film further includes a diffusion part disposed between adjacent prism patterns to diffuse light, And the diffuser comprises a plurality of hemispherical recesses. A first base film; And It includes a light control film disposed on the first base film and including a plurality of air tunnels arranged in a direction parallel to the first base film, The light control film may include a plurality of prism patterns attached to an upper surface of the first base film and defining side surfaces of the air tunnels, and an organic layer covering upper edges of the prism patterns to define upper surfaces of the air tunnels. More, The light control film further includes a diffusion part disposed between adjacent prism patterns to diffuse light, The diffusion member includes a plurality of protrusions having a pyramid shape. A first base film; And It includes a light control film disposed on the first base film and including a plurality of air tunnels arranged in a direction parallel to the first base film, The light control film may include a plurality of prism patterns attached to an upper surface of the first base film and defining side surfaces of the air tunnels, and an organic layer covering upper edges of the prism patterns to define upper surfaces of the air tunnels. More, The light control film further includes a diffusion part disposed between adjacent prism patterns to diffuse light, And the diffusion part includes a plurality of recesses having a pyramid shape. A first base film; And It includes a light control film disposed on the first base film and including a plurality of air tunnels arranged in a direction parallel to the first base film, The light control film may include a plurality of prism patterns attached to an upper surface of the first base film and defining side surfaces of the air tunnels, and an organic layer covering upper edges of the prism patterns to define upper surfaces of the air tunnels. More, The light control film further includes a diffusion part disposed between adjacent prism patterns to diffuse light, The diffuser includes an auxiliary prism extending in the same direction as the prism patterns. The optical member of claim 1, wherein the organic layer comprises the same material as the prism patterns. The optical member of claim 14, wherein the organic layer comprises a photocurable material. A first base film; And It includes a light control film disposed on the first base film and including a plurality of air tunnels arranged in a direction parallel to the first base film, The optical control film further comprises a plurality of air capsules disposed between adjacent air tunnels. The optical member according to claim 16, wherein the air capsules are arranged along side edges of the adjacent air tunnels. delete A first base film; And It includes a light control film disposed on the first base film and including a plurality of air tunnels arranged in a direction parallel to the first base film, A second base film disposed on the light control film to protect the light control film; And And a diffusion layer comprising diffusion particles and a resin attaching the diffusion particles to an upper surface of the second base film. A first base film; And It includes a light control film disposed on the first base film and including a plurality of air tunnels arranged in a direction parallel to the first base film, A second base film disposed on the light control film to protect the light control film; And And an upper prism pattern disposed on the second base film and extending in a direction crossing the air tunnels. 21. The optical member according to claim 20, wherein the cross sections of the air tunnels have a horseshoe shape. 21. The method of claim 20, wherein the light control film further comprises a diffuser disposed between the adjacent prism patterns to diffuse the light, the diffuser comprises an auxiliary prism extending in the same direction as the prism patterns Optical member. A first base film; And It includes a light control film disposed on the first base film and including a plurality of air tunnels arranged in a direction parallel to the first base film, A second base film disposed on the light control film to protect the light control film; And And an optical control pattern disposed on the second base film and extending in a direction crossing the air tunnels and having a horseshoe shape in cross section. A first base film; And It includes a light control film disposed on the first base film and including a plurality of air tunnels arranged in a direction parallel to the first base film, A second base film disposed on the light control film to protect the light control film; And And a second light control film disposed on the second base film and including a plurality of second air tunnels arranged in a direction parallel to the second base film. 25. The optical member of claim 24, further comprising a third base film disposed on the second light regulating film to protect the second light regulating film. The optical member according to claim 25, wherein the optical member has a multi-layered structure including at least four base films and at least three light adjusting films disposed between the base films. Forming a plurality of prism patterns extending in directions parallel to each other on the first base film; Coating a coating layer on the second base film; Aligning the second base film on the base substrate such that the coating layer faces the prism patterns; Pressing the second base film toward the first base film to insert an upper portion of the prism patterns into the coating layer; And Hardening the coating layer to form an organic film. 28. The method of claim 27, further comprising the step of forming a curved portion at the boundary between the prism patterns and the coating layer by diffusing a portion of the coating layer by the surface tension to the sides of the prism patterns. Way. 28. The method of claim 27, further comprising irradiating light to the coated coating layer. 28. The method of claim 27, wherein the forming of the prism patterns further comprises forming a diffusion part between adjacent prism patterns. 28. The method of claim 27, wherein the coating layer comprises a photocurable material. 28. The method of claim 27, wherein the prism patterns include a plurality of recesses thereon.

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