KR20120014460A - Unified optical sheet - Google Patents

Abstract

PURPOSE: An integrated optical sheet is provided to shorten an assembling process by omitting a separate bonding process or a mounting process on a lateral rack. CONSTITUTION: A first optical sheet(20) includes a first optical functional body. A reflective polarization sheet(10) is arranged on the upper part of the first optical sheet. A bonding layer(40) combines the first optical sheet and the reflective polarization sheet. The reflective polarization sheet is comprised of cholesteric liquid crystals.

Description

Integrated Optical Sheets {UNIFIED OPTICAL SHEET}

The present invention relates to an integrated optical sheet, and more particularly, to an integrated optical sheet used for an optical function such as a liquid crystal display device.

A liquid crystal display (LCD) is a device that displays an image by injecting a liquid crystal between two glass plates and applying power to the upper and lower glass plate electrodes to change the liquid crystal molecular array in each pixel. Unlike a cathode ray tube (CRT), a plasma display panel (PDP), and the like, a display by a liquid crystal display is not light-emitting because it is non-luminous in itself. To compensate for these disadvantages, a light source assembly uniformly irradiated on the information display surface is mounted for the purpose of enabling use in a dark place.

The light source assembly used in the liquid crystal display device is largely classified into two types. The first is an edge type light source assembly that provides light at the side of the liquid crystal display, and the second is a direct type light source assembly that provides light directly at the rear of the liquid crystal display. In the case of the edge type light source assembly, a light guide plate is provided to allow the light emitted from the light source to be irradiated upward, and at least one optical sheet is disposed above the light guide plate to adjust optical characteristics of light passing through the light guide plate. In the case of the direct type light source assembly, a diffuser plate is provided to reduce bright lines of light emitted from the light source, and at least one optical sheet is provided to control optical characteristics of light passing through the diffuser plate. Each of the optical sheets has a specific optical function such as refraction or diffusion, and specifically includes light diffusing sheets, prism sheets, and the like.

Liquid crystal display devices are superior in that they consume less power than PDPs or CRTs, but the front luminance tends to be lowered. Therefore, it is required to increase the optical efficiency by the backlight and to increase the front luminance with low power consumption. In general, in order to increase the front luminance, an optical sheet including a plurality of diffusion sheets and a prism sheet is mounted inside the liquid crystal display device. The light emitted from the light sources spaced apart from each other is diffused by the diffusion sheet so that the light can be evenly distributed, and at the same time, the prism sheet is provided to maintain the brightness at a high state, so that the light is redirected to minimize the lost light. Make sure you get the picture quality.

The conventional optical sheet mainly includes a prism rib which is a triangular or semicircular optical function formed on the base layer and one surface thereof. The plurality of prism ribs are arranged in parallel to each other and perform the light condensing and polarizing functions of the prism lens to redirect the light diffused by the diffusing film in the direction of the liquid crystal display. Since the prism ribs formed on one surface of the prism sheet among the optical sheets have a structure in which the light diffused by the diffusing film is difficult to deflect forward, since the prism ribs are arranged in parallel in a straight line, they are orthogonal to the arrangement of the prism ribs in the lower layer. The prism sheet laminated body structure provided with the pattern of the prism rib of a lower layer so that it may become a form can be employ | adopted. Alternatively, the laminate may be configured in such a manner that the arrangement of the prism ribs on the upper and lower layers is the same.

After the light from the light source passes through the prism sheet through the diffusion sheet, the polarizing sheet is further provided so that only specific polarization reaches the liquid crystal. The polarizing sheet passes only specific polarized light such as linearly polarized light, circularly polarized light, and elliptical polarized light according to the kind, and reflects the rest. In particular, cholesteric liquid crystals that reflect the remaining polarized light can be used as the reflective polarizing sheet to minimize the loss of light from the light source.

The prism sheet and the reflective polarizing sheet as described above are manufactured separately and mounted on the liquid crystal display device. At this time, the interval between the prism sheet (optical sheet) and the reflective polarizing sheet mounted up and down may be spaced apart, but in this case, the thickness of the entire liquid crystal display device becomes thick. This is not appropriate in view of the need for ultra-thin liquid crystal display devices, which are recently increasing in thickness.

SUMMARY OF THE INVENTION The present invention has been conceived based on these points, and the problem to be solved by the present invention is an integrated optical sheet bonded together so that a plurality of prism sheets are integrally stacked, while maintaining the thickness of the entire liquid crystal display device thinly, In order to solve the problem of deflection function caused by the penetration of the functional body or prism rib.

Another object of the present invention is to provide a configuration in which a plurality of optical sheets and the reflective polarizing sheet is integrally bonded to each other, there is no need to adhere to the optical sheet or mounted on the side holder separately, thereby reducing the assembly process cost It is an object of the present invention to provide an integrated optical sheet that is advantageous in terms of aspects.

Another object of the present invention is to reduce the width of the optical sheet and the reflective polarizing sheet to allow more light to pass through the reflective polarizing sheet to provide an integrated optical sheet that can improve the brightness of the front liquid crystal display device It is.

The objects of the present invention are not limited to the above-mentioned objects, and other objects that are not mentioned will be clearly understood by those skilled in the art from the following description.

In order to solve this problem, the integrated optical sheet according to the present invention includes a first optical sheet having a first optical functional body, a reflective polarizing sheet positioned on the first optical sheet, and between the first optical sheet and the reflective polarizing sheet. It includes an adhesive layer for bonding.

More preferably, the integrated optical sheet according to the present invention includes a first optical sheet having a first optical function, a second optical sheet positioned below the first optical sheet, and having a second optical function; A cholesteric liquid crystal layer positioned on the first optical sheet, an adhesive layer bonding the first optical sheet and the cholesteric liquid crystal layer, and the first optical sheet and the second optical sheet to be positioned between the first optical sheet and the second optical sheet. A bonding body which integrally couples an 1st optical sheet and a 2nd optical sheet is included.

A more detailed example of the integrated optical sheet according to the present invention will be described later in the embodiment section with reference to the drawings.

The integrated optical sheet according to the present invention provides a configuration in which a plurality of optical sheets and a reflective polarizing sheet are integrally bonded to each other, so that the optical sheets do not need to be adhered to each other or mounted on a side holder, thereby shortening the assembly process and reducing costs. Is advantageous in

In addition, the integrated optical sheet according to the present invention may reduce the width of the optical sheet and the reflective polarizing sheet to allow more light to pass through the reflective polarizing sheet, thereby contributing to the improvement of the brightness of the front liquid crystal display.

In addition, since the thickness of the integrated optical sheet according to the present invention is thin, it is effective in terms of ultra-thin liquid crystal display device.

The effects according to the present invention are not limited by the contents exemplified above, and more various effects are included in the present specification.

1 is a view showing the structure of a conventional liquid crystal display device.
2 is a cross-sectional view of an integrated optical sheet according to an embodiment of the present invention.
3 is a perspective view of a prism sheet constituting an integrated optical sheet according to an embodiment of the present invention.
4 is a perspective view of a prism sheet constituting an integrated optical sheet according to another embodiment of the present invention.
5 is a perspective view showing a lenticular prism sheet of the present invention.
6 is a cross-sectional view of the reflective polarizing sheet of the integrated optical sheet according to the embodiment of the present invention.
7 is a cross-sectional view illustrating a prism sheet stack structure of an integrated optical sheet according to another embodiment of the present invention.
8 is a cross-sectional view illustrating a prism sheet stack structure of an integrated optical sheet according to another embodiment of the present invention.
Fig. 9 is a perspective view showing the prism sheet laminated structure of the present invention.
10 is a cross-sectional view illustrating a prism sheet stacking structure of an integrated optical sheet according to another embodiment of the present invention.
11 to 13 are cross-sectional views showing a prism sheet according to another embodiment of the present invention.

Advantages and features of the present invention and methods for achieving them will be apparent with reference to the embodiments described below in detail with the accompanying drawings. However, the present invention is not limited to the embodiments disclosed below, but will be implemented in various forms, and only the present embodiments are intended to complete the disclosure of the present invention, and the general knowledge in the art to which the present invention pertains. It is provided to fully convey the scope of the invention to those skilled in the art, and the present invention is defined only by the scope of the claims.

DETAILED DESCRIPTION Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings. Regardless of the drawings, the same reference numbers refer to the same components, and “and / or” includes each and every combination of one or more of the items mentioned.

Although the first, second, etc. are used to describe various components, these components are of course not limited by these terms. These terms are only used to distinguish one component from another. Therefore, of course, the first component mentioned below may be a second component within the technical spirit of the present invention.

The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. In the present specification, the singular form includes plural forms unless otherwise specified in the specification. As used herein, "comprises" and / or "comprising" does not exclude the presence or addition of one or more other components in addition to the mentioned components.

Unless otherwise defined, all terms (including technical and scientific terms) used in the present specification may be used in a sense that can be commonly understood by those skilled in the art. In addition, the terms defined in the commonly used dictionaries are not ideally or excessively interpreted unless they are specifically defined clearly.

The spatially relative terms " below ", " beneath ", " lower ", " above ", " upper " It may be used to easily describe the correlation of a component with other components. Spatially relative terms are to be understood as including terms in different directions of components in use or operation in addition to the directions shown in the figures. For example, when inverting an element shown in the figures, an element described as "below" or "beneath" of another element may be placed "above" another element . Thus, the exemplary term "below" can encompass both an orientation of above and below. The components can be oriented in other directions as well, so that spatially relative terms can be interpreted according to the orientation.

As used herein, the term "sheet" may be used to mean "~ film", "~ plate". Hereinafter, with reference to the accompanying drawings will be described embodiments of the present invention.

1 is a diagram illustrating an optical path of a liquid crystal display device. Light emitted from the light emitting backlight unit 1 diffuses and moves evenly through the diffusion sheet 2. The moved light reaches the reflective polarizing sheet 5 via the prism sheets 3 and 4. The reflective polarizing sheet 5 passes only specific polarizations and reflects the remaining light. Recently, a cholesteric liquid crystal (CLC) constituting a special reflective polarizing sheet 5 for improving light efficiency and brightness has been proposed.

The cholesteric liquid crystal (CLC) has a constant pitch and is repeatedly twisted. The cholesteric liquid crystals (CLCs) have a constant pitch, and the major axes of adjacent molecules in the longitudinal direction are slightly shifted from each other, and have a spiral structure as a whole. Repeated twisted helical structure induces Bragg reflection of light. The pitch of the cholesteric liquid crystal is related to the wavelength of the reflected light. That is, the wavelength of light reflected by the cholesteric liquid crystal is proportional to the pitch of the cholesteric liquid crystal and the refractive index of the cholesteric liquid crystal. Cholesteric liquid crystals are classified into right-handed cholesteric liquid crystals and left-handed cholesteric liquid crystals according to their spiral directions. Preferred cholesteric liquid crystals reflect right polarized light but transmit left polarized light. In contrast, the left cholesteric liquid crystal transmits right polarized light but reflects left circular polarized light. Therefore, in theory, the cholesteric liquid crystal transmits 50% of the light of the wavelength included in the band width reflected by the cholesteric liquid crystal and reflects the remaining 50%. The reflected light is directed back to the light source and then reflected again to the reflective polarizing sheet. At this time, since the phase is changed, some of them have the same phase as the desired polarization, so that 50% of the remaining 50% of the reflected light may be transmitted again. This structure allows certain circularly polarized light to pass through and reflects circularly polarized light in the other direction. Therefore, since the light is not extinct but reflects, the reflected light is directed back in the opposite direction, and when a phase difference occurs and reaches the reflective polarizing sheet 5 again, some of the light may be transmitted through the reflective polarizing sheet 5 again. . If the above process is repeated, theoretically 100% of the light emitted from the backlight unit 1 can pass through the reflective polarizing sheet 5, which is advantageous in terms of improving the brightness.

2 is a cross-sectional view of an integrated optical sheet according to an embodiment of the present invention. The integrated optical sheet according to the present invention includes a first optical sheet 20 having a first optical function body 21, a reflective polarizing sheet 10 positioned on the first optical sheet 20, and a first optical sheet. An adhesive layer 15 for bonding between the sheet 20 and the reflective polarizing sheet 10 is included. The reflective polarizing sheet 10 may be configured of the cholesteric liquid crystal described above, but is not limited thereto. In addition to the cholesteric liquid crystal, for example, a polarizing sheet such as DBEF may be used. The reflective polarizing sheet 10 passes only polarized light having a desired phase among circularly polarized light or linearly polarized light. Particularly, in the case of the cholesteric liquid crystal layer, only one of the left circularly polarized light or the right circularly polarized light is selectively passed, and the other is reflected. The retardation film (not shown) is separately used so that the light passing through the circularly polarized light is incident on the liquid crystal in a linearly polarized form. Will be further laminated. Therefore, only linearly polarized light having a specific phase is incident on the liquid crystal layer.

The first optical sheet 20 condenses the light to direct the light in a specific direction (upward in FIG. 2). As shown in FIG. 3, the first optical sheet 20 may include a lower substrate 22 and an optical functional body 21 positioned on the substrate 22. 2 illustrates a configuration in which the tip portion of the optical functional body 21 faces the reflective polarizing sheet 10, but the first optical functional body 21 may be configured to include the first optical sheet 20. It may be located on the opposite side of the surface opposite to the reflective polarizing sheet 10. As illustrated in FIG. 3, the first optical functional bodies 21 may have a line shape having a constant cross section and may be arranged in plurality in parallel with each other. 3 illustrates an example in which the cross-sectional shape perpendicular to the longitudinal direction of the optical functional body 21 is a triangle, but is not limited thereto. The cross-section may be a quadrangle or a semi-circle as necessary. In addition, although only an example in which the peak portion of the cross section of the optical functional body 21 is illustrated is not limited thereto, the peak portion of the cross section of the optical functional body 21 as described below with reference to FIGS. 11 to 13. It may have a configuration that is rounded and combined with the reflective polarizing sheet 10. At this time, the peak portion of the cross-section of the optical functional body 21 may vary depending on the type of the reflective polarizing sheet 10. When the reflective polarizing sheet 10 is formed of a cholesteric liquid crystal layer, the peak portion is sharp. Alternatively, all of the round-processed configurations may be employed, and in the case where the reflective polarizing sheet 10 is a DBEF layer, only a configuration in which the peak portion is rounded may be adopted to further impart a light diffusion function.

On the other hand, all or part of the optical functional body 21 may have regular or irregular surface irregularities to have a constant surface roughness Ra (also referred to as "surface roughness"). The surface roughness may be in the range of 0.01 μm to 20 μm. The reason why the surface roughness range is as described above is that if the surface roughness is smaller than 0.01 μm, the refractive property is improved to increase the front luminance, but the diffusion effect is lowered. If the surface roughness is larger than 20 μm, the scattering effect property is excellent. This is because the front brightness drops a lot. In particular, when the surface treatment is performed such that the peak portion of the optical functional body 21 has an appropriate surface roughness, as described later, a part of the peak of the optical functional body 21 penetrates into the adhesive layer 15, thereby causing a brightness and diffusion effect. This can compensate for the problem of decreasing. Such surface roughness may be applied not only to the first optical functional body 21 but also to the second optical functional body 31 described later.

3 illustrates a configuration in which the plurality of first optical functional bodies 21 have the same cross-section, but is not limited thereto. The cross-sections of the plurality of first optical functional bodies 21 may have different shapes. This shape is well illustrated in Figures 11-13 described below. On the other hand, an example in which the cross section of the first optical functional body 21 is semi-circular is shown in FIG. The optical functional body 21 may have a lenticular shape as shown in FIG. 5 in addition to the line shape. In the case of the line type having a triangular cross-sectional shape, the light condensing function is excellent in a certain area, and the line type or lenticular type optical functional body 21 having a semi-circular cross section performs the light condensing function evenly in all areas. There is an advantage.

In order to integrally couple the optical sheet 20 and the reflective polarizing sheet 10, an adhesive layer 15 is included between the optical sheet 20 and the reflective polarizing sheet 10. In order for the optical sheet 20 and the reflective polarizing sheet 10 to be more firmly coupled, a portion of the tip of the first optical function 21 may be included in the adhesive layer 15. The material forming the adhesive layer 15 is not limited, but since a part of the tip of the optical functional body 21 through which light penetrates is penetrated into the adhesive layer 15, the material is made of a material that does not block or scatter light. It is preferable.

FIG. 6 is a diagram illustrating a surface treatment performed on the surface of the reflective polarizing sheet 10. When the reflective polarizing sheet 10 is a cholesteric liquid crystal layer, a surface treatment process may be performed to form irregularities on the surface to more effectively reflect polarized light. The surface treatment may be performed in a separate post process after the cholesteric liquid crystal is cured, and may be performed before the process of curing the cholesteric liquid crystal. The surface treatment may be performed by a stamping technique of pressing a mold having a shape corresponding to the shape of the unevenness formed on the outer surface or rolling it with a roller or the like.

7 illustrates an integrated optical sheet according to another embodiment of the present invention. The integrated optical sheet according to another embodiment of the present invention may be disposed below the first optical sheet 20 and further include a second optical sheet 30 having a second optical function body 31. A separate adhesive component is applied between the first optical sheet 20 and the second optical sheet 30 so that a part of the tip of the second optical sheet 30 is part of the adhesive layer formed on the bottom surface of the first optical sheet 20. It may have a configuration that penetrates. The second optical sheet 30 may have the same basic configuration and function as the first optical sheet 20. That is, the second optical functional body 31 of the second optical sheet 30 may also be provided in the form of a line having a constant cross-section and may be arranged in a plurality in parallel with each other, the length of the second optical functional body 31 The cross section perpendicular to the direction may be one shape selected from triangles, squares and semicircles. Like the first optical functional body 21 described above, the plurality of second optical functional bodies 31 of FIG. 7 are illustrated to have the same cross-section, but are not limited thereto, and the plurality of second optical functional bodies 31 are not limited thereto. Cross sections of the 31 may have different shapes. This shape is well illustrated in Figures 11-13 described below. 11 to 13 illustrate the first optical sheet 20, the second optical sheet 30 may have the same configuration. That is, the plurality of second optical functional bodies 31 of the second optical sheet 30 may also be arranged to have different cross-sectional shapes, and the optical functional bodies having regular or irregularly different cross-sectional shapes may be disposed. Referring back to FIG. 7, the second optical functional body 31 may be a lenticular type in addition to the line type. When a plurality of line type optical functional bodies are arranged side by side, light having a specific displacement on a specific direction, that is, an axis perpendicular to the longitudinal direction may be incident vertically, but light may be focused on light having other displacements. Will not be able to perform However, since light having a specific displacement is focused twice, the light collecting efficiency is excellent. On the other hand, in the case of an optical function of the lenticular type, there is an advantage of performing a function of uniformly polarizing and condensing all light without a specific direction.

8 shows that both the first optical function body 21 and the second optical function body 31 are in the form of a line, and the second optical function body 31 is perpendicular to the longitudinal axis of the first optical function body 21. The unitary optical sheet is shown extending in the crossing direction. Light having various phases and travel directions is emitted from the light source and travels through the first optical functional body 21 toward the display unit provided on the front surface of the liquid crystal display device, wherein the length of the first optical functional body 21 is varied. When the direction and the longitudinal direction of the second optical functional body 31 are arranged to be parallel to each other, there is an advantage that the light condensing function is excellent because it is refracted twice in the same direction. On the other hand, as shown in FIG. 8, when the first optical function 21 and the second optical function 31 in a line form are arranged in a form perpendicular to each other in an imaginary projection plane where they meet each other, compared to the previous case. The advantage is that it can redirect more light.

In order to condense the light evenly, both the first optical function body 21 and the second optical function body 31 may have a linear shape, are arranged in a shape perpendicular to each other, and may have a triangular cross-sectional shape.

FIG. 9 further includes a bonding body 40 positioned between the first optical sheet 21 and the second optical sheet 31 to integrally couple the first optical sheet 21 and the second optical sheet 31. An integral optical sheet is shown. The bonded body 40 integrally combines the first optical sheet 20 and the second optical sheet 30, and maintains a proper distance between the first optical sheet 20 and the second optical sheet 30 to maintain light. This allows for efficient transmission. In particular, the tip portion of the first optical functional body 21 of the first optical sheet 20 is kept in contact with the second optical sheet 30 so that light is evenly distributed over the entire area of the first optical functional body 21. Allow permeation. Although the material of the bonded body 40 is not limited, it may be preferably made of the same material as the first and second optical sheets 20 and 30 to perform an effective function of refraction of light. Bonding body 40 may have a variety of shapes, in particular may be in the form of a line having a constant cross-section selected from rectangular, trapezoidal and semicircle. Alternatively, the bonded body 40 may be provided in plural and arranged parallel to each other at regular intervals, or may be in the form of a column provided in plural other than the line shape.

FIG. 10 is a view showing a state in which the optical functional bodies 21 and 31 of the first optical sheet 20 and the second optical sheet 30 face each other. If necessary, in addition to the optical function array of FIG. 7, the optical functions 21 and 31 may be provided to face each other as shown in FIG. 10. In the configuration shown in FIG. 10, since the tip portion of the first optical function body 21 of the first optical sheet 20 is oriented with respect to the reflective polarizing sheet 10 and the adhesive layer 15, a portion of the tip portion is adhered to the adhesive layer 15. Since it does not penetrate into), the brightness is improved.

11 to 13 illustrate examples of various patterns of the first optical functional body 21 of the first optical sheet 20. As described above, not only the first optical sheet 20 but also the second optical sheet 30 may have the configuration illustrated in FIGS. 11 to 13. In addition to the triangular, rectangular, and semi-circular shapes, the optical functional bodies may be regularly or irregularly arranged with different optical cross-sectional shapes between the plurality of optical functional bodies. In the illustrated example, the optical functional body has a triangular cross section, and the optical functional body has a trapezoidal cross section in which the peak portion is periodically rounded. The optical functions may be arranged, and in addition to the optical functions having a triangular cross section, rectangular and / or semicircular optical functions may be arranged regularly or irregularly. When an optical functional body having a cross-sectional shape different from a regularly adjacent optical functional body is arranged, for example, it may be arranged at intervals of 10, 30 or 50 uniform optical functionalities. An optical functional body having a rounded trapezoidal cross-sectional shape as shown in FIG. 11 may have an effect of uniformly diffusing light due to a condensed upper surface while performing a light condensing function. FIG. 12 shows a configuration in which an optical functional body having a triangular cross-sectional shape with rounded ends is disposed between a plurality of optical functional bodies. Thus, as in the configuration of FIG. 11, the light may have an effect of being evenly spread by the rounded top surface. Fig. 13 shows a configuration in which optical functional bodies having different sizes are arranged. That is, the cross-sectional shapes of the plurality of optical functional bodies may not only be different from each other, but also the height or the overall cross-sectional size between adjacent optical functional bodies may be different.

On the other hand, the surface of the reflective polarizing sheet 10 and the optical sheet (20, 30) is generally a coating treatment, the coating treatment is to perform the antistatic, anti-wear and adhesion preventing functions. Therefore, a separate coating process is required, which increases cost and processing time. In particular, the optical sheets 20 and 30 having the optical functional units in the micrometer unit may damage the optical functional bodies even in the small impact that may be applied during the production transportation process. The protective sheet covers the optical functional bodies of the optical sheets 20 and 30 to protect them. However, since the integrated optical sheet according to the present invention provides the reflective polarizing sheet 10 and the optical sheets 20 and 30 that are integrally coupled, a separate process for coating and protecting the optical function is unnecessary. . Therefore, even if the coating layer is removed from the coating layer on the opposing surface of the reflective polarizing sheet 10 with the first optical sheet 20, there is no problem in terms of function, thereby reducing the cost and processing time.

10: reflective polarizing sheet
20: first optical sheet
30: second optical sheet
40: conjugate

Claims (15)

A first optical sheet having a first optical functional body,
A reflective polarizing sheet positioned on an upper portion of the first optical sheet;
An integrated optical sheet comprising an adhesive layer for bonding between the first optical sheet and the reflective polarizing sheet. The method of claim 1,
The reflective polarizing sheet is an integrated optical sheet composed of cholesteric liquid crystal. The method of claim 1,
And the first optical functional body is located on an opposite surface of the first optical sheet to a surface opposite to the reflective polarizing sheet. The method of claim 1,
The first optical functional bodies are in the form of lines having a constant cross section and are arranged in plurality in parallel with each other, and the cross sections perpendicular to the longitudinal direction of the plurality of first optical functional bodies each have one or more shapes selected from triangles, squares, and semicircles. The integrated optical sheet having. The method of claim 1,
The first optical functional body is an integrated optical sheet having a lenticular shape. The method of claim 1,
A second optical sheet positioned below the first optical sheet and having a second optical function, and disposed between the first optical sheet and the second optical sheet to integrate the first optical sheet and the second optical sheet; An integrated optical sheet further comprising a bonding body to bond to the. The method of claim 6,
The second optical functional bodies are in the form of lines having a constant cross section and are arranged in plurality in parallel with each other, and the cross sections perpendicular to the longitudinal direction of the plurality of second optical functional bodies each have one or more shapes selected from triangles, squares, and semicircles. The integrated optical sheet having. The method of claim 6,
The second optical functional body is an integrated optical sheet having a lenticular shape. The method of claim 6,
Wherein the first optical functional body and the second optical functional body are in the form of a line, and the second optical functional body extends in a direction perpendicular to the longitudinal axis of the first optical functional body. The method of claim 6,
The bonded body is a unitary optical sheet in the form of a line having a constant cross-section of the rectangular, trapezoidal and semicircle. The method of claim 6,
The bonded body is provided with a plurality of integral optical sheets arranged parallel to each other at regular intervals. The method of claim 1,
The integrated optical sheet of the reflective polarizing sheet is removed from the coating layer on the opposite surface of the first optical sheet. A first optical sheet having a first optical functional body,
A second optical sheet positioned below the first optical sheet and having a second optical function;
A reflective polarizing sheet composed of a cholesteric liquid crystal positioned on an upper portion of the first optical sheet;
An adhesive layer bonding between the first optical sheet and the reflective polarizing sheet;
An integrated optical sheet including a bonding body positioned between the first optical sheet and the second optical sheet to integrally combine the first optical sheet and the second optical sheet. The method of claim 13,
The bonded body is provided with a plurality of integral optical sheets arranged parallel to each other at regular intervals. The method of claim 13,
Wherein the first optical functional body and the second optical functional body are in the form of a line, and the second optical functional body extends in a direction perpendicular to the longitudinal axis of the first optical functional body.

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