KR101290288B1 - Optical film, method of producing the same, stereoscopic glasses and stereoscopic display having the same - Google Patents

Abstract

The present invention relates to an optical film capable of realistically expressing color or stereoscopic feeling of a stereoscopic image, and capable of maintaining a wide viewing angle, a manufacturing method thereof, and a stereoscopic glasses and a stereoscopic display device including the same. The optical film is formed on the first substrate, the polarizing film laminated on the first substrate, the second substrate laminated on the polarizing film, and the second substrate, and the stretching direction of the polarizing film is 45 ° or −45 °. And a liquid crystal layer comprising an alignment layer rubbed in a horizontal direction with the surface of the second substrate at an angle of and a horizontal alignment liquid crystal formed on the alignment layer and horizontal with the rubbing direction of the alignment layer, wherein the liquid crystal layer is represented by the following formula: Re (400/560) value according to I] satisfies 0.80 <Re (400/560) <1.15, and the mirror reflectance of 420 nm wavelength is 20% or less,
&Lt; RTI ID = 0.0 &gt;
Re (400/560) = Re (400) / Re (560)
In Equation (I), Re (400) is an in-plane retardation (nm) at 400 nm wavelength, Re (560) is an in-plane retardation (nm) at 560 nm wavelength, and the mirror reflectance of 420 nm wavelength is obtained by superimposing the film on the mirror. It is a value measured after the reflectance of 420nm wavelength.

Description

Optical film, method for manufacturing thereof, stereoscopic glasses and stereoscopic display apparatus including the same {Optical film, method of producing the same, stereoscopic glasses and stereoscopic display having the same}

The present invention relates to an optical film, a manufacturing method thereof, a stereoscopic glasses and a stereoscopic display device including the same, and more particularly, an optical film capable of realistically expressing color or stereoscopic sense of a stereoscopic image and maintaining a wide viewing angle. It relates to a manufacturing method, a stereoscopic glasses and a stereoscopic display device comprising the same.

As the demand for 3D stereoscopic images increases, the related technologies are rapidly developing. In general, 3D stereoscopic images use the principle of visual difference between two eyes using two eyes. That is, when different images are input to each of the two eyes, the brain perceives the two images to feel a three-dimensional effect.

Techniques used to reproduce stereoscopic images include an autostereoscopic stereoscopic display method, spectacle stereoscopic display method, and holographic method. There are advantages and disadvantages for each method, and various studies are underway to obtain superior stereoscopic images.

In recent years, many people can watch a stereoscopic image together, and the glasses type stereoscopic display method, which is relatively easy to implement technology, is mainly used. The three-dimensional display type is divided into a time division method and a space division method. The time division method uses a shutter glasses and the spatial division method uses a polarized glasses to realize a stereoscopic image.

Polarizing glasses include an optical film for adjusting the optical characteristics of the image incident from the display device. The optical film typically includes a compensation layer for compensating the phase of light, and the compensation layer is formed by attaching the stretched polymer film to the base layer or coating the liquid crystal layer.

The compensation layer polarizes the light by changing the phase of incident light. For example, when circularly polarized light passes through the compensation layer, it becomes linearly polarized light. However, conventional compensation layers are not easy to uniformly compensate for the phase of light in all wavelength bands. The wavelength of visible light is widely distributed in the range of 380 to 780 nm. When visible light passes through the compensation layer, phases of light in all wavelength bands are not uniformly compensated. Therefore, various problems arise, such as the light leaking from a polarizing plate, the hue of the light emitted from a labeling apparatus, or the front contrast deteriorating. In particular, when used in three-dimensional glasses, three-dimensional feeling can be reduced and dizziness can be caused.

In the current technology, multiple compensation layers are used to overlap each other to uniformly compensate the phase of light in all wavelength bands. However, when several sheets of compensation layers are overlapped with each other, the structure of the film may be complicated and the manufacturing cost may be increased, and the amount of light transmission may be reduced.

Accordingly, it was necessary to manufacture an optical film having excellent optical performance at a relatively low cost and simple structure by adjusting factors that predominantly affect light leakage and color tone variation of the polarizing plate.

SUMMARY OF THE INVENTION The present invention has been made in an effort to provide an optical film, a method of manufacturing the same, a stereoscopic glasses, and a stereoscopic display device, which can realistically express color or stereoscopic sense of a stereoscopic image and maintain a wide viewing angle.

The technical objects of the present invention are not limited to the technical matters mentioned above, and other technical subjects not mentioned can be clearly understood by those skilled in the art from the following description.

An optical film according to an embodiment of the present invention for achieving the above technical problem, a first substrate, a polarizing film laminated on the first substrate, a second substrate laminated on the polarizing film, and the second An alignment film formed on the substrate and having an angle of 45 ° or −45 ° with the stretching direction of the polarizing film and rubbed in a horizontal direction with the surface of the second substrate, and formed on the alignment film and horizontal with the rubbing direction of the alignment film A liquid crystal layer including a horizontally aligned liquid crystal forming a liquid crystal layer, wherein the liquid crystal layer satisfies a value of 0.80 <Re (400/560) <1.15 according to Equation (I) below, and has a wavelength of 420 nm. Mirror reflectance is less than 20%,

&Lt; RTI ID = 0.0 &gt;

Re (400/560) = Re (400) / Re (560)

In Equation (I), Re (400) is an in-plane retardation (nm) at 400 nm wavelength, Re (560) is an in-plane retardation (nm) at 560 nm wavelength, and the mirror reflectance at 420 nm wavelength is used to mirror the film to the mirror. It is the value which measured the reflectance of 420 nm wavelength after superposition.

According to an aspect of the present invention, there is provided a method of manufacturing an optical film, the method including: attaching a first substrate and a second substrate to both surfaces of the polarizing film after stretching the polarizing film; Applying and rubbing the composition or rubbing directly on the second substrate, wherein the first alignment layer is formed by rubbing in the horizontal direction with the surface of the second substrate at an angle of 45 ° or -45 ° to the stretching direction of the polarizing film. A method of manufacturing an optical film including a liquid crystal layer, the method comprising: coating a liquid crystal composition on the first alignment layer, and curing the liquid crystal composition by irradiating ultraviolet rays to the liquid crystal composition. Re (400/560) value according to [Equation I] satisfies 0.80 <Re (400/560) <1.15, and the mirror reflectance of 420 nm wavelength is 20% or less,

&Lt; RTI ID = 0.0 &gt;

Re (400/560) = Re (400) / Re (560)

In Equation (I), Re (400) is an in-plane retardation (nm) at 400 nm wavelength, Re (560) is an in-plane retardation (nm) at 560 nm wavelength, and the mirror reflectance at 420 nm wavelength is used to mirror the film to the mirror. It is the value which measured the reflectance of 420 nm wavelength after superposition.

Stereoscopic glasses according to an embodiment of the present invention for achieving the technical problem, including a right eye lens and a left eye lens, the right eye lens and the left eye lens, the first substrate, and the polarization laminated on the first substrate A film, a second substrate laminated on the polarizing film, and formed on the second substrate and forming an angle of 45 ° or -45 ° with the stretching direction of the polarizing film in a horizontal direction with the surface of the second substrate. And an optical film including a rubbed alignment layer and a liquid crystal layer formed on the alignment layer, the liquid crystal layer including a horizontal alignment liquid crystal that is parallel to the rubbing direction of the alignment layer, wherein the liquid crystal layer is formed according to [Equation I]. The Re (400/560) value satisfies 0.80 <Re (400/560) <1.15, and the mirror reflectance at 420 nm wavelength is less than 20%,

&Lt; RTI ID = 0.0 &gt;

Re (400/560) = Re (400) / Re (560)

In Equation (I), Re (400) is an in-plane retardation (nm) at 400 nm wavelength, Re (560) is an in-plane retardation (nm) at 560 nm wavelength, and the mirror reflectance at the 420 nm wavelength is used to mirror the film to the mirror. It is the value which measured the reflectance of the wavelength of 420 nm after superposition, and the phase difference of the liquid crystal layer of the said right eye lens and the liquid crystal layer of the left eye lens is (lambda) / 2.

According to an aspect of the present invention, a stereoscopic display device includes a display panel for displaying a right eye image and a left eye image, and a polarization state of the right eye image overlapping the display panel. An optical filter including a first polarization region, a second polarization region for adjusting a polarization state of the left eye image, a right eye lens for transmitting the right eye image, and a left eye lens for transmitting the left eye image 3D glasses, wherein the right eye lens and the left eye lens comprise a first substrate, a polarizing film laminated on the first substrate, a second substrate laminated on the polarizing film, and the second substrate. An alignment layer formed at an angle of 45 ° or −45 ° with the stretching direction of the polarizing film and rubbed in a horizontal direction with the surface of the second substrate; Including the optical film comprising the liquid crystal layer including a liquid crystal horizontally oriented form a rubbing direction and the horizontal, respectively, and

The liquid crystal layer has a Re (400/560) value of 0.80 <Re (400/560) <1.15 according to Equation (I) below and a mirror reflectance of 420 nm wavelength is 20% or less,

&Lt; RTI ID = 0.0 &gt;

Re (400/560) = Re (400) / Re (560)

In Equation (I), Re (400) is an in-plane retardation (nm) at 400 nm wavelength, Re (560) is an in-plane retardation (nm) at 560 nm wavelength, and the mirror reflectance at the 420 nm wavelength is used to mirror the film to the mirror. It is the value which measured the reflectance of the wavelength of 420 nm after superposition, and the phase difference of the liquid crystal layer of the said right eye lens and the liquid crystal layer of the left eye lens is (lambda) / 2.

Using the optical film according to the present invention can obtain a three-dimensional glasses excellent in optical performance with a thin thickness compared to the conventional compensation film. In particular, even if applied to the three-dimensional glasses to significantly reduce light leakage, color tone variation, etc., it is possible to obtain a clear three-dimensional feeling without causing dizziness.

In addition, the stereoscopic display device can compensate for the limitation of the viewing angle according to the viewing position, so that the stereoscopic image can be observed at various positions.

1 is a cross-sectional view of an optical film according to a first embodiment of the present invention.
2 is a graph showing wavelength dispersion in various retardation films.
3 is a graph showing mirror reflectances for respective wavelength bands for various retardation films.
4 is a diagram illustrating a method of measuring a mirror reflectance of an optical film.
5 is a cross-sectional view of an optical film according to a second embodiment of the present invention.
6 is a cross-sectional view of an optical film according to a third embodiment of the present invention.
7 is a cross-sectional view of an optical film according to a fourth embodiment of the present invention.
8 is a cross-sectional view of an optical film according to a fifth exemplary embodiment of the present invention.
9A and 9B are plan views of an optical film according to an embodiment of the present invention.
10A through 10E are cross-sectional views illustrating a manufacturing process of an optical film according to an embodiment of the present invention.
11 is a cross-sectional view of a manufacturing process of an optical film according to another exemplary embodiment of the present invention.
12A and 12B are cross-sectional views of a manufacturing process of an optical film according to another embodiment of the present invention.
FIG. 13 is a diagram illustrating an image display process of a stereoscopic display device according to an embodiment of the present invention.

Advantages and features of the present invention and methods of achieving the same will become apparent with reference to the embodiments described below in detail in conjunction with the accompanying drawings. However, the present invention is not limited to the embodiments disclosed below, but can be implemented in various different forms, and only the embodiments make the disclosure of the present invention complete, and the general knowledge in the art to which the present invention belongs. It is provided to fully inform the person having the scope of the invention and the invention is defined only by the scope of the claims. Like reference numerals refer to like elements throughout the specification.

In describing the arrangement relationship of each component, 'upper', 'up', 'lower', 'down', etc. of a component will mainly be described based on the direction shown in the drawings. Used to easily describe spatially relative relationships.

Hereinafter, the optical film 100 according to the first embodiment of the present invention will be described in detail with reference to FIG. 1. 1 is a cross-sectional view of an optical film according to a first embodiment of the present invention.

The optical film 100 according to the first embodiment of the present invention is used for three-dimensional stereoscopic glasses, and the stereoscopic image displayed on the stereoscopic display device 1 is accurately separated from the left eye image and the right eye image to the viewer. can do. The optical film 100 may be used alone or by adding a separate functional film or functional layer to the optical film 100 on the upper or lower portion of the first substrate 110 and the upper or lower portion of the second substrate 130. Can be used as stereoscopic glasses. Here, the functional film or functional layer is a function of a three-dimensional stereoscopic glasses such as a retardation compensation film or a retardation compensation layer, a protective film or a protective layer, an antireflection film or an antireflection layer, a hard coat film or a hard coat layer, a polymer film, or the like. It refers to all films and layers having optical properties to complement the.

Referring to the specific structure of the optical film 100, the optical film 100 is the first substrate 110, the polarizing film 120, the second substrate 130, the alignment film 140 and the liquid crystal layer 150 Include.

The first substrate 110 and the second substrate 130 are disposed with the polarizing film 120 interposed therebetween, and serve as a structure for supporting the optical film 100. The first substrate 110 and the second substrate 130 may be a triacetyl cellulose (TAC) film. In addition, the first substrate 110 and the second substrate 130 are polyethylene terephthalate polymer, polyethylene naphthalate polymer, polyester polymer, polyethylene polymer ( polyethylene polymer, polypropylene polymer, polyvinylidene chloride polymer, polyvinyl alcohol polymer, polyethylene vinyl alcohol polymer, polystyrene Polystyrene polymer, polycarbonate polymer, norbornene polymer, poly methyl pentene polymer, polyether ketone polymer, polyether sulfide Polyether sulfone polymer, polysulfone polymer, polyether Ketone imide polymer (polyether ketone imide polymer), polyamide polymer (polyamide polymer), polymethacrylate polymer (polymethacrylate polymer), polyacrylate polymer (polyacrylate polymer), polyarylate polymer (polyarylate polymer), It may be formed of one of a cycloolefin polymer, a cycloolefin copolymer and a fluoropolymer polymer.

The polarizing film 120 is stacked on the first substrate 110. The polarizing film 120 has a property of transmitting light of a component perpendicular to the absorption axis, and is formed by stretching polyvinyl alcohol (PVA) absorbing iodine, which is a polarizer.

The second substrate 130 is stacked on the polarizing film 120. That is, the polarizing film 120 has a structure in which the first substrate 110 and the second substrate 130 are attached to both surfaces to be supported and protected. The first substrate 110 and the second substrate 130 may be formed to a thickness of 10 ~ 1000㎛ to sufficiently support the polarizing film 120, the polarizing film 120 to a thickness of 5 ~ 100㎛ Can be formed. For example, when the polarizing film 120 is 30㎛, the first substrate 110 and the second substrate 130 may use a film having a thickness of 1 ~ 1000㎛, preferably 80㎛ each film Can be used.

On the other hand, an alignment agent such as polyimide or polyvinyl alcohol is coated on the second substrate 130 to form the alignment layer 140. The alignment layer 140 is rubbed in one direction so that the liquid crystal molecules can be aligned in the horizontal direction.

The liquid crystal layer 150 is formed on the alignment layer 140. The liquid crystal layer 150 is horizontally oriented in a horizontal direction with the surface of the second substrate 130 on the alignment film 140 rubbed at 45 ° or −45 ° with respect to the stretching direction of the polyvinyl alcohol that is the polarizing film 120. The alignment liquid crystal 151 is included. The alignment layer 140 may be formed by coating and rubbing the alignment layer composition on the second substrate 130, but is not limited thereto. The alignment layer 140 may be formed by directly rubbing the surface of the second substrate 130 in one direction. That is, the alignment layer 140 is not only formed of a layer of a different material from the second substrate 130 but also has a structure in which the surface of the second substrate 130 is directly rubbed to align the liquid crystal molecules to form the alignment layer 140. It can be said.

The liquid crystal layer 150 compensates for the phase difference of circularly polarized light. The liquid crystal layer 150 includes a horizontal alignment liquid crystal 151 which serves to compensate for the phase difference, and the horizontal alignment liquid crystal is arranged in the rubbing direction and the horizontal direction of the alignment layer 140.

On the other hand, the liquid crystal layer 150 has a Re (400/560) value of 0.80 <Re (400/560) <1.15 according to Equation (I).

&Lt; RTI ID = 0.0 &gt;

Re (400/560) = Re (400) / Re (560)

In Equation (I), Re (400) is an in-plane retardation (nm) at 400 nm wavelength, and Re (560) is an in-plane retardation (nm) at 560 nm wavelength.

Example 1 Example 2 Comparative Example 1 Comparative Example 2 Re (400/560) 1.13 0.84 1.36 1.01 Hue change none none Occur none Light fountain none none Occur none

Referring to Table 1 and FIG. 2, the liquid crystal layer 150 has a Re (400/560) value of 0.80 <Re (400/560) <1.15 according to Equation I below to change color tone, There is no deterioration in image quality such as light leakage.

[Table 1] and FIG. 2 are tables and graphs showing wavelength dispersion characteristics in various retardation films, indicating that a change in color tone may occur depending on the relationship between phase differences for each wavelength band.

Example 1 and Example 2 show an optical film using a liquid crystal layer as a retardation film and having a Re (400/560) value of 0.80 <Re (400/560) <1.15. On the other hand, Comparative Example 1 uses an elongated polycarbonate film as a retardation film, and represents an optical film whose Re (400/560) value does not satisfy 0.80 <Re (400/560) <1.15.

First, referring to FIG. 2, Example 1 includes a liquid crystal layer having a negative wavelength dispersion in which a phase difference value gradually decreases from a short wavelength to a long wavelength, and has a Re (400/560) value. This 1.13 meets 0.80 <Re (400/560) <1.15. Example 1 exhibits good image quality due to no color change or light leakage when used in stereoscopic glasses.

Subsequently, Example 2 includes a liquid crystal layer having a positive wavelength dispersion property in which a phase difference value gradually increases from a short wavelength to a long wavelength, with a Re (400/560) value of 0.84 and a Re (400/560). ) Value satisfies 0.80 <Re (400/560) <1.15. Example 2 also exhibits good image quality due to no change in color tone or light leakage when used in stereoscopic glasses.

Comparative Example 1 then includes a retardation film made of elongated polycarbonate material having negative wavelength dispersion, in which the retardation value gradually decreases from shorter wavelengths to longer wavelengths as in Example 1. In Comparative Example 1, the Re (400/560) value is 1.36, which does not satisfy 0.80 <Re (400/560) <1.15. When Comparative Example 1 is used for three-dimensional glasses, problems such as color tone degeneration and light leakage occur in this range as shown in [Table 1].

Comparative Example 2 then comprises a retardation film based on the elongated cycloolefin copolymer having a zero wavelength dispersion of the same phase difference value at almost all wavelengths. In Comparative Example 2, the Re (400/560) value is 1.01, which satisfies 0.80 <Re (400/560) <1.15. Therefore, Comparative Example 2 exhibits good image quality because no color change or light leakage occurs when used in stereoscopic glasses. However, the case of Comparative Example 2 is not suitable for use in stereoscopic glasses because the manufacturing process is complicated and productivity is not only low but also expensive.

On the other hand, the optical film 100 should satisfy the mirror reflectance of 20% or less of 420nm wavelength. 3 shows the results of measuring mirror reflectances for each wavelength band for various retardation films. Here, the mirror reflectance refers to a value measured by using a colorimeter after reflecting the optical film 100 onto the mirror as shown in FIG. 4. When the mirror reflectance of various phase difference films is measured for each wavelength band, as shown in FIG. 3, the mirror reflectance rapidly increases and decreases in the vicinity of the 400 nm wavelength band, and then gradually increases at more than 680 nm. .

Example 1 Example 2 Comparative Example 1 Comparative Example 2 Mirror reflectance (420 nm) 14.7 13.7 21.0 23.8 Mirror reflectance
(780 nm) 25.1 25.8 22.0 20.9 Hue change none none Occur  Occur Light fountain none none Occur Occur

In Examples 1 and 2, when the mirror reflectance is less than 20% at the wavelength of 420 nm, color change and light leakage do not occur when used in three-dimensional glasses, it is possible to implement good image quality.

On the other hand, as shown in Comparative Example 1 and Comparative Example 2, when the mirror reflectance exceeds 20% at the wavelength of 420nm, there is a problem that the image quality is deteriorated due to the color tone change and light leakage phenomenon occurs when used in the three-dimensional glasses.

On the other hand, in the wavelength region of more than 760nm, the mirror reflectance exceeds 20%, but since the red wavelength period of the long wavelength band is long, the amount of light lost while passing through the optical film is relatively small. Therefore, the mirror reflectance in the wavelength region of 760 nm or more does not significantly affect the image quality of the stereoscopic screen.

However, since the blue wavelength period of the wavelength region near 420 nm is short, the original image quality of the stereoscopic image is mixed with blue and it is difficult to realize the original image quality unless the blue visible light transmitted by the optical film is effectively suppressed. Therefore, the image quality of a stereoscopic screen cannot be improved unless the mirror reflectance is suppressed to 20% or less. That is, in order to realize a stereoscopic image, the stereoscopic glasses should suppress the mirror reflectance within 20% at 420 nm wavelength.

In order to adjust the retardation value and the mirror reflectance of the liquid crystal layer used as the retardation film of the optical film, the thickness of the liquid crystal layer, the alignment direction of the liquid crystal molecules, etc. may be adjusted.

For example, the thickness of the liquid crystal layer can increase the phase retardation value, and finely control the phase retardation value and the mirror reflectance of the liquid crystal layer by making the liquid crystal layer into a hybrid liquid crystal form including both the horizontal alignment liquid crystal and the vertical alignment liquid crystal. Can be. Specific methods for adjusting the phase difference value and the mirror reflectance of the liquid crystal layer will be described in detail in the following embodiments.

Except for the hybrid liquid crystal layer 160, the optical film 100a according to the second embodiment of the present invention is substantially the same as the optical film 100 of the first embodiment described above. Therefore, description of the remaining components except for the hybrid liquid crystal layer 160 is omitted.

The hybrid liquid crystal layer 160 is a form in which the vertically aligned liquid crystal 152 is partially mixed between the horizontally aligned liquid crystals 151, and serves to compensate for the phase difference and the viewing angle of circularly polarized light. The hybrid liquid crystal layer 160 may contain 85% or more of the horizontally aligned liquid crystal 151 that serves to compensate for the phase difference, and the vertically aligned liquid crystal 152 that serves to compensate the viewing angle may occupy 15% or less. Preferably, the horizontal alignment liquid crystal 151 occupies about 85 to 99% (by weight or volume), and the vertical alignment liquid crystal 152 serving to compensate for a viewing angle may occupy about 1 to 15%. That is, the main role of the hybrid liquid crystal layer 160 is to compensate for the phase difference, and the horizontally aligned liquid crystal 151 occupies most of the functions to faithfully perform this function.

The hybrid liquid crystal layer 160 may include a liquid crystal tilted at an angle of 0 to 90 ° in addition to the horizontal alignment liquid crystal 151 and the vertical alignment liquid crystal 152. As described above, the liquid crystal molecules tilted at an angle of 0 to 90 ° may help the viewing angle compensation. However, if the ratio is too high in the hybrid liquid crystal layer 160, crosstalk may occur when used in 3D glasses. It is desirable to adjust not to exceed 10%.

In particular, the liquid crystal tilted at an angle of 0 to 90 ° with the vertically aligned liquid crystal 152 may greatly affect the mirror reflectance of the optical film 100a. Therefore, when the ratio and position of the vertically aligned liquid crystal 152 and the liquid crystal tilted at an angle of 0 to 90 ° are properly adjusted, the mirror reflectance can be adjusted to within 20% at a wavelength of 420 nm.

The hybrid liquid crystal layer 160 may be formed to a thickness of 0.1 to 20㎛, which may be reduced to 1/10 or less in thickness compared to when the stretched polymer film is used.

The protective film 170 is attached to the top of the hybrid liquid crystal layer 160 or the outermost surface of the first substrate 110. The protective film 170 is attached to the outermost layer to protect the optical film 100a. Protective film 170 is a polycarbonate film; Polyester-based films such as polyethylene terephthalate; Polyether sulfone-based film; Polyolefin-based films having polyethylene, polypropylene, cyclo-based or norbornene structures; Polyolefin type films, such as ethylene propylene copolymer, etc. can be used. The protective film can be removed when viewing a stereoscopic image or as needed in the process of manufacturing the optical film.

Except for the hybrid liquid crystal layer 160, the optical film 100b according to the third embodiment of the present invention is substantially the same as the optical film 100a of the first embodiment described above. Therefore, description of the remaining components except for the hybrid liquid crystal layer 160 is omitted.

The hybrid liquid crystal layer 160 includes a first region A1 in which only the horizontal alignment liquid crystal 151 exists, and a second region A2 in which the horizontal alignment liquid crystal 151 and the vertical alignment liquid crystal 152 are mixed. . The first area A1 and the second area A2 are areas formed by dividing the surface of the optical film 100b, and the optical film 100b includes the first area A1 and the second area A2. .

The first area A1 and the second area A2 will be described in detail. The first area A1 of the hybrid liquid crystal layer 160 is an area for compensating the phase difference, and the second area A2 is a phase difference. Area for compensation of viewing angle with compensation of In addition, the second area A2 is an area that can control the light transmitted laterally and can adjust the lateral mirror reflectance. That is, the mirror reflectance may be different from each other in the vertical direction and the lateral direction, and when the difference in the mirror reflectance in the vertical direction and the lateral direction becomes large, the image quality of the stereoscopic image may be deteriorated. This mirror reflectance is a factor that also has a great influence on the viewing angle and requires proper control. Therefore, the mirror reflectance can be effectively adjusted by appropriately adjusting the first region A1 and the second region A2.

When the optical filter 100b is used as a three-dimensional stereoscopic glasses, some areas are hardly influenced by the viewing angle, and some areas need to be corrected. In this case, a region having no problem in the viewing angle of the optical filter 100b may be set as the first region A1, and a region requiring compensation for the viewing angle may be set as the second region A2. For example, the second area A2 may be located outside the first area A1 or may be formed in an edge area of the optical filter 100b. In detail, as illustrated in FIG. 9A, the first area A1 and the second area A2 may be concentric, and the second area A2 may be located outside the first area A1. In addition, as illustrated in FIG. 9B, the first area A1 and the second area A2 may be arranged in a stripe shape.

Meanwhile, in the second area A2, the horizontal alignment liquid crystal 151 may be 85 to 99%, and the vertical alignment liquid crystal 152 may be configured to 1 to 15%. As described above, when the ratio of the horizontally aligned liquid crystal 151 of the second area A2 is 85% or less, the phase difference compensation effect is reduced, and when the horizontally aligned liquid crystal 151 exceeds 99%, the viewing angle compensation effect is reduced. .

Hereinafter, the optical film 100c according to the fourth embodiment of the present invention will be described in detail with reference to FIG. 7. 7 is a cross-sectional view of an optical film according to a fourth embodiment of the present invention.

The optical film 100c according to the fourth exemplary embodiment of the present invention includes a hybrid liquid crystal layer including the first liquid crystal layer 150a and the second liquid crystal layer 160, and has a hard coat layer on the hybrid liquid crystal layer. 181 and low refractive index layer 182 are further laminated. That is, the first liquid crystal layer 160a and the second liquid crystal layer 160b overlap to form a hybrid liquid crystal layer.

The structure in which the first substrate 110, the polarizing film 120, and the second substrate 130 are sequentially stacked is substantially the same as the above-described embodiment. The first alignment layer 140 is coated on the second substrate 130, and the first alignment layer 140 is rubbed in one direction. In addition, the alignment layer may be formed by directly rubbing the second substrate 130 in one direction.

The first liquid crystal layer 160a including the horizontally aligned liquid crystal 151 is formed on the first alignment layer 140. The first liquid crystal layer 160a is a liquid crystal layer for retardation compensation, and includes only the horizontally aligned liquid crystal 151. do. That is, the first alignment layer 140 is rubbed in the horizontal direction, and the first liquid crystal layer 160a is horizontally aligned along the rubbing direction of the first alignment layer 140 without any further processing. The first alignment layer 140 may be omitted, the surface of the second substrate 130 may be rubbed in one direction, and the first liquid crystal layer 160a may be formed on the second substrate 130.

The second alignment layer 141 is formed on the first liquid crystal layer 160a, and the second liquid crystal layer 160b including the vertical alignment liquid crystal 152 is formed on the second alignment layer 141. Here, the second alignment layer 141 may be omitted. That is, the second liquid crystal layer 160b may be formed by coating, vertically aligning, and curing the liquid crystal composition on the first liquid crystal layer 160a. The manufacturing process of the hybrid liquid crystal layer including the first liquid crystal layer 160a and the second liquid crystal layer 160b will be described later in detail.

Meanwhile, as described above, the hybrid liquid crystal layer may include the first liquid crystal layer 160a and the second liquid crystal so that the horizontal alignment liquid crystal 151 may be 85 to 99%, and the vertical alignment liquid crystal 152 may be configured to 1 to 15%. The ratio of the liquid crystal layer 160b may be adjusted. That is, the hybrid liquid crystal layer is formed such that the first liquid crystal layer 160a is 85 to 99% and the second liquid crystal layer 160b is 1 to 15% based on the thickness. For example, the first liquid crystal layer 160a may have a thickness of 0.1 to 20 μm, and the second liquid crystal layer 160b may have a thickness of 2 μm or less.

The first liquid crystal layer 160a and the second liquid crystal layer 160b may be stacked on the second substrate 130 in the order of the first liquid crystal layer 160a and the second liquid crystal layer 160b, but are not limited thereto. The second liquid crystal layer 160b may be first stacked on the second substrate 130, and the first liquid crystal layer 160a may be formed thereon.

The hard coat layer 181 and the low refractive index layer 182 constituting the antireflection layer are sequentially stacked on the second liquid crystal layer 160b. The hard coat layer 181 may contain an ionizing radiation curable resin and 5 to 15% by weight of a conductive metal oxide.

The ionizing radiation curable resin can be used including at least one of a monomer having a vinyl group, a (meth) acryloyl group, an epoxy group, an oxetanyl group, a prepolymer, and a polymer. Further, as the conductive wire metal oxide, antimony-tin oxide (ATO), indium-tin oxide (ITO), phosphorus-tin oxide (PTO), zinc oxide (ZnO), tin oxide (SnO ₂ ), and zinc antimonate (ZnSb) ₂ O ₆ ), antimony pentaoxide (Sb ₂ O ₅ ), and the like can be used.

In addition, the low refractive index layer 182 may have a refractive index lower than that of the hard coat layer 181, thereby improving antireflection function. The low refractive index layer 182 may contain low refractive index inorganic particles such as silica or magnesium fluoride having a void therein, a binder, a solvent, and the like. In addition, a polymerization initiator or various additives can be added as needed.

Examples of the binder include inorganic binders such as an organic binder which is an ionizing reflection curable resin composed of a monomer having a vinyl group, a (meth) acryloyl group, an epoxy group, an oxetanyl group, a prepolymer, and a polymer, and a thermosetting binder such as silica sol. A binder can be used.

Hereinafter, the optical film 100d according to the fifth embodiment of the present invention will be described in detail with reference to FIG. 8. 8 is a cross-sectional view of an optical film according to a fifth exemplary embodiment of the present invention.

In the optical film 100d according to the fifth exemplary embodiment, the second liquid crystal layer 160b includes a first region A1 including the horizontally aligned liquid crystal 151 and a second alignment region including the vertically aligned liquid crystal 152. Except as divided by the area A2, the remaining components are substantially the same as the optical film 100c of the fourth embodiment described above. Therefore, the description of the remaining components except for the second liquid crystal layer 160b is omitted.

The second liquid crystal layer 160b is disposed on the first liquid crystal layer 160a and is divided into a first region A1 and a second region A2. The first area A1 is an area in which only the horizontally aligned liquid crystal 151 exists, and the second area A2 is an area in which only the vertically aligned liquid crystal 152 exists. However, only the vertical alignment liquid crystal 152 may not necessarily exist in the second region A2. For example, the hybrid liquid crystal layer may be formed such that the first liquid crystal layer 160a is 85 to 99% and the second liquid crystal layer 160b is 1 to 15% based on the thickness, but the second liquid crystal layer ( When 160b) is greater than or equal to 10% of the hybrid liquid crystal layer, the vertical alignment liquid crystal 152 and the horizontal alignment liquid crystal 151 may be mixed and distributed.

As described above, the first area A1 becomes a phase difference compensation area, and the second area A2 becomes an area capable of viewing angle compensation along with phase difference compensation.

9A and 9B, the first region and the second region of the optical film according to an embodiment of the present invention may be variously disposed. 9A and 9B are plan views of an optical film according to an embodiment of the present invention.

First, referring to FIG. 9A, the first region A1 and the second region A2 are arranged to form concentric circles on the surface of the optical film 100b. When the optical film 100b is used for three-dimensional stereoscopic glasses, the first region A1 is formed in the center portion where the viewing angle is relatively limited, and the second region A2 is formed on the outer portion of the first region A1. Can be formed. The first region A1 is formed in a circular shape only, and the shape of the first region A1 is not necessarily circular. That is, when the first region A1 is disposed in the central region of the optical film 100b and the second region A2 is disposed at the edge portion, the first region A1 may be formed in a quadrangle or an arbitrary shape. .

Referring to FIG. 9B, the first area A1 and the second area A2 are arranged in a stripe shape. The optical film 100b 'may be divided in a straight line to form a central portion as the first region A1 and an edge portion as the second region A2. In FIG. 9B, the optical sheet divided in the horizontal direction has been described as an example. However, the present invention is not limited thereto, and the optical sheet may be divided in the vertical direction. That is, the arrangement shown in FIGS. 9A and 9B is merely exemplary, and may be modified in various shapes.

Hereinafter, a method of manufacturing an optical film according to an embodiment of the present invention will be described in detail with reference to FIGS. 1 and 10A to 10E. 10A through 10E are cross-sectional views illustrating a manufacturing process of an optical film according to an embodiment of the present invention.

First, referring to FIG. 10A, after the polarizing film 120 is stretched, the first substrate 110 and the second substrate 130 are attached to both surfaces of the polarizing film 120. As described above, the first substrate 110 and the second substrate 130 may be triacetyl cellulose (TAC) films, and the polarizing film 120 is formed by stretching polyvinyl alcohol (PVA) treated with iodine. .

The polarizing film 120 is formed by stretching a polyvinyl alcohol (PVA) film and then impregnating the aqueous solution of iodine. When the iodine component is adsorbed on the surface in the stretching direction of the PVA film, the PVA film is colored in a dark green form to complete the polarizing film 120. The first substrate 110 and the second substrate 130 are bonded to both surfaces of the polarizing film 120 to form a support of the polarizing film 120. However, the manufacturing process and bonding method of the first substrate 110, the polarizing film 120, and the second substrate 130 may be manufactured by various methods in addition to the methods described herein.

Next, referring to FIG. 10B, the alignment layer composition is coated on the second substrate 130 and rubbed in the horizontal direction to form the alignment layer 140.

The alignment layer composition is coated on the second substrate 130 to have a uniform thickness. The alignment layer composition may be coated by spin coating, gravure coating, dip coating, spray coating, roll coating method, and the like, and after the alignment layer composition is coated, it is dried to remove the solvent. The solvent may be completely cured after predrying so that the alignment film composition may be uniformly spread. When the photoinitiator is included in the alignment layer composition, a photocuring method using ultraviolet rays or the like may be used.

Meanwhile, a rubbing process is performed using a rubbing cloth on the alignment layer 140 that has been cured to complete the alignment layer 140 aligned in a predetermined direction.

Subsequently, referring to FIG. 10C, the liquid crystal composition is coated on the alignment layer 140 and irradiated with ultraviolet rays to firstly cure the liquid crystal composition.

Specifically, the liquid crystal composition is coated on the alignment layer 140. The coating method may be a spin coating, gravure coating, dip coating, spray coating, roll coating method, like the coating method of the alignment film. It is preferable that the liquid crystal composition is coated with a thickness of 0.1 to 20 µm so as to properly compensate for the phase difference.

The liquid crystal composition is coated and then dried to remove the solvent. The liquid crystal composition may be dried at room temperature or heated and dried using an oven or a heating plate, or may be dried using an infrared light or the like.

After the liquid crystal composition is dried, the horizontally aligned liquid crystal layer is polymerized and first cured. Primary curing is not a step of completely curing the liquid crystal composition, but refers to the semi-curing to some extent that the liquid crystal contained in the liquid crystal composition can be moved by an external electric field.

By irradiating ultraviolet light (UV) to the liquid crystal composition and primary curing, most of the horizontally aligned liquid crystal molecules are fixed in direction.

Subsequently, referring to FIG. 10D, some of the liquid crystal molecules included in the liquid crystal composition are vertically aligned by forming electric fields on the upper and lower portions of the first cured liquid crystal composition.

When the electrodes 191 and 192 are disposed on the upper and lower portions of the liquid crystal layer 160 and power is applied to form an electric field, some of the horizontally aligned liquid crystals rotate in the vertical direction. The vertically aligned liquid crystal 152 that switches in the vertical direction is uniformly generated throughout the liquid crystal layer 160. That is, when the liquid crystal layer 160 is uniformly primary cured, the vertically aligned liquid crystal 152 is uniformly generated throughout the liquid crystal layer 160. The strength and time of the electric field may be adjusted in consideration of the degree of primary curing of the liquid crystal layer 160. As described above, the horizontal alignment liquid crystal 151 is preferably about 85 to 99%, and the vertical alignment liquid crystal 152 is preferably adjusted to occupy 1 to 15%.

Next, referring to FIG. 10E, an electric field is applied to the first cured liquid crystal layer 160 to completely cure the liquid crystal layer 160 by secondary curing in a state in which some liquid crystal molecules are vertically aligned.

Secondary curing may be performed by irradiating ultraviolet rays, and after the secondary curing is completed, the liquid crystal molecules inside the liquid crystal layer 160 are completely fixed.

Finally, referring to FIG. 1, the optical film 100a is completed by laminating a protective film 170 or the like on the liquid crystal layer 160.

Hereinafter, a manufacturing method of an optical film according to another exemplary embodiment of the present invention will be described with reference to FIGS. 6 and 11. 11 is a cross-sectional view of a manufacturing process of an optical film according to another exemplary embodiment of the present invention.

A method of manufacturing an optical film according to another embodiment of the present invention relates to a method of manufacturing an optical film including a hybrid liquid crystal layer divided into a first region and a second region.

First, since the process of FIGS. 10A to 10C is the same as the above-described embodiment, description thereof will be omitted.

Referring to FIG. 11, electrodes 191 and 192 are disposed above and below the resultant of FIG. 10C, respectively. In this case, an electrode 192 overlapping only the second region A2 is disposed on the liquid crystal layer 160 to prevent an electric field from being formed in the first region A1.

As a result, only the horizontal alignment liquid crystal 151 is present in the first region A1, and the horizontal alignment liquid crystal 151 and the vertical alignment liquid crystal 152 are mixed in the second region A2. As the electrode overlapping only the second region A2, an electrode having various shapes such as an electrode having a central portion or a stripe electrode may be used.

Subsequently, when the UV light is irradiated onto the liquid crystal layer 160 to be cured in a second manner, the hybrid liquid crystal layer in which the first region A1 and the second region A2 are divided is completed, and the protective film 170 is attached to the hybrid liquid crystal layer. When the optical film 100 of Figure 2 is completed.

Hereinafter, a manufacturing process of an optical film according to another embodiment of the present invention will be described in detail with reference to FIGS. 7, 12A, and 12B. 12A and 12B are cross-sectional views of a manufacturing process of an optical film according to another embodiment of the present invention.

The manufacturing method of an optical film according to another embodiment of the present invention relates to a manufacturing method of an optical film including a first liquid crystal layer and a second liquid crystal layer.

Referring to FIG. 12A, the liquid crystal composition is coated on the resultant of FIG. 10B and irradiated with ultraviolet rays to firstly cure the same. That is, the liquid crystal composition is coated and then dried to remove the solvent. The liquid crystal composition may be dried at room temperature or heated and dried using an oven or a heating plate, or may be dried using an infrared light or the like.

After the liquid crystal composition is dried, the horizontally aligned liquid crystal layer is polymerized and first cured. However, primary curing means full curing rather than a semi-cured state as in the previous embodiment. After the primary curing is completed, only the horizontally aligned liquid crystal 151 is present in the first liquid crystal layer 160a.

Next, referring to FIG. 12B, the second alignment layer 140 is coated on the first liquid crystal layer 160a and vertically aligned to form the second liquid crystal layer 160b.

The second liquid crystal layer 160b is a liquid crystal layer including only the vertically aligned liquid crystal 152 and may be vertically aligned by the vertically aligned second alignment layer 140. In addition, the liquid crystal molecules may be vertically aligned by forming an electric field as in the above-described embodiment.

Then, the hard coat layer 181 and the low refractive index layer 182 is formed on the second liquid crystal layer to complete the optical film 100c of FIG. 7.

Hereinafter, a stereoscopic display device according to an exemplary embodiment of the present invention will be described in detail with reference to FIG. 13. FIG. 13 is a diagram illustrating an image display process of a stereoscopic display device according to an embodiment of the present invention.

The stereoscopic display device 1 includes a display panel 10 for displaying a stereoscopic image largely and a stereoscopic glasses 20 for dividing a stereoscopic image displayed on the display panel 10 into a left eye image and a right eye image.

The display panel 10 is a device for generating and displaying a left eye image and a right eye image so that an observer can feel a three-dimensional effect, and includes a backlight 11, a first polarizing plate 12, a display element 13, and a second polarizing plate ( 14 and an optical filter 15.

The display panel 10 may use a liquid crystal display device for displaying an image by the operation of liquid crystal molecules as the display device 13. Specifically, since the liquid crystal display device is a passive light emitting device, the backlight 11 for providing light to the display device 13 is disposed at the rear, and the front left is divided into the left eye pixel L and the right eye pixel R. The display element 13 is arrange | positioned.

The first polarizing plate 12 and the second polarizing plate 14 are disposed on both surfaces of the display element 13, and the first polarizing plate 12 and the second polarizing plate 14 are disposed such that absorption axes are perpendicular to each other. . That is, when the absorption axis of the first polarizing plate 12 is in the horizontal direction, the absorption axis of the second polarizing plate 14 is arranged to be in the vertical direction.

On the other hand, the optical filter 15 is disposed in front of the second polarizing plate 14. The optical filter 15 polarizes the left eye image and the right eye image emitted from the display element 13 in different directions. That is, the optical filter 15 is patterned so that the regions overlapping the left eye pixel L and the right eye pixel R of the display element 13 have different polarization characteristics. Accordingly, the left eye image emitted through the left eye pixel L is circularly polarized in a counterclockwise direction, and the right eye image emitted through the right eye pixel R is, for example, circularly in a clockwise direction. Can be polarized.

The left eye image and the right eye image emitted from the display panel 10 may be emitted as circularly polarized light in different directions.

Meanwhile, the observer observes the left eye image and the right eye image emitted from the display panel 10 through the stereoscopic glasses 20. As described above, the stereoscopic glasses 20 include the optical film 100 including the polarizing film 120 and the liquid crystal layer 150.

The liquid crystal layer 150 has a Re (400/560) value of 0.80 <Re (400/560) <1.15 according to Equation (I) below and a mirror reflectance of 420 nm wavelength is 20% or less.

&Lt; RTI ID = 0.0 &gt;

Re (400/560) = Re (400) / Re (560)

In Equation (I), Re (400) is an in-plane retardation (nm) at 400 nm wavelength, Re (560) is an in-plane retardation (nm) at 560 nm wavelength, and the mirror reflectance at 420 nm wavelength is obtained by superimposing the film on the mirror. It is a value measured after the reflectance of 420nm wavelength.

The stereoscopic glasses 20 include a left eye lens and a right eye lens, respectively, and an optical film included in the left eye lens and the right eye lens so that the phase difference of the liquid crystal layer 150 is λ / 2. That is, when the phase difference value of the liquid crystal layer 150 of the left eye lens is λ / 4, the phase difference value of the liquid crystal layer 150 of the right eye lens may be 3λ / 4.

In addition, the liquid crystal layers 150 of the left eye lens and the right eye lens differ in orientation from each other by 90 °. For example, when the alignment direction of the liquid crystal layer 150 of the left eye lens is 135 °, the alignment direction of the liquid crystal layer 150 of the right eye lens may be 45 °. The polarizing film 120 included in the stereoscopic glasses 20 may have the same transmission axis in the horizontal direction.

The operation process of the stereoscopic display device 1 will be described.

The display panel 10 emits left and right eye images each circularly polarized in different directions. In this case, the left eye image and the right eye image are incident through the left eye lens and the right eye lens of the stereoscopic glasses 20. The left eye image and the right eye image incident through the left eye lens are converted into linearly polarized images by the liquid crystal layer 150 of the left eye lens. In this case, the left eye image is converted into linearly polarized light in which the transmission axis of the polarizing film 120 is aligned with the direction, and the right eye image is converted into linear polarization in the direction perpendicular to the transmission axis of the polarizing film 120. Therefore, only the left eye image of the image incident through the left eye lens passes through the polarizing film 120.

On the other hand, the left eye image and the right eye image incident through the right eye lens are converted into linearly polarized images by the liquid crystal layer 150 of the right eye lens. In this case, the left eye image is converted into linearly polarized light in a direction perpendicular to the transmission axis of the polarizing film 120, and the right eye image is converted into linear polarization coinciding with the transmission axis of the polarizing film 120. Therefore, only the right eye image of the image incident through the right eye lens passes through the polarizing film 120.

Through this process, the observer sees the left eye image and the right eye image through the left eye and the right eye, respectively, to feel a three-dimensional effect.

Although embodiments of the present invention have been described above with reference to the accompanying drawings, those skilled in the art to which the present invention pertains may implement the present invention in other specific forms without changing the technical spirit or essential features thereof. I can understand that. It is therefore to be understood that the above-described embodiments are illustrative in all aspects and not restrictive.

1: stereoscopic display device 10: display panel
11: backlight 12: first polarizer
13: Display Element 14: Second Polarizing Plate
15: optical filter 20: stereoscopic glasses
100: optical film 110: first substrate
120: polarizing film 130: second substrate
140: alignment layer 150: hybrid liquid crystal layer
160: second liquid crystal layer 170: protective film

Claims (14)

A first substrate;
A polarizing film laminated on the first substrate;
A second substrate laminated on the polarizing film; And
An alignment layer formed on the second substrate and rubbing in a horizontal direction with a surface of the second substrate at an angle of 45 ° or −45 ° with the stretching direction of the polarizing film;
A liquid crystal layer formed on the alignment layer and including a horizontal alignment liquid crystal that is horizontal to a rubbing direction of the alignment layer,
The liquid crystal layer has a Re (400/560) value of 0.80 <Re (400/560) <1.15 according to Equation (I) below and a mirror reflectance of 420 nm wavelength is 20% or less,
&Lt; RTI ID = 0.0 &gt;
Re (400/560) = Re (400) / Re (560)
In Equation (I), Re (400) is an in-plane retardation (nm) at 400 nm wavelength, Re (560) is an in-plane retardation (nm) at 560 nm wavelength,
The mirror reflectance of the 420nm wavelength is a value obtained by measuring the reflectance of the 420nm wavelength after the film is superimposed on the mirror. The method of claim 1,
The liquid crystal layer further comprises a vertically aligned liquid crystal forming a vertical direction with the surface of the second substrate. The method of claim 2,
The said liquid crystal layer is 85 to 99% of said horizontally oriented liquid crystal, and the said optically oriented liquid crystal film is comprised from 1 to 15%. The method of claim 2,
The liquid crystal layer includes a first region in which only the horizontal alignment liquid crystal exists, and a second region in which the horizontal alignment liquid crystal and the vertical alignment liquid crystal are mixed. 5. The method of claim 4,
The first region and the second region are concentric circles, the second region is located outside the first region or disposed in a stripe shape. The method of claim 2,
The liquid crystal layer includes a first liquid crystal layer including the horizontally aligned liquid crystal and a second liquid crystal layer overlapping the first liquid crystal layer and including the vertically aligned liquid crystal. The method of claim 2,
The liquid crystal layer includes a first liquid crystal layer including the horizontal alignment liquid crystal, a first region overlapping with the first liquid crystal layer, and a second region in which only the horizontal alignment liquid crystal exists and only the vertical alignment liquid crystal exist. An optical film containing a second liquid crystal layer. 8. The method according to any one of claims 6 and 7,
The first liquid crystal layer is formed to a thickness of 0.1 to 20㎛ and the second liquid crystal layer is formed to a thickness of 2㎛ or less. Attaching a first substrate and a second substrate to both surfaces of the polarizing film after stretching;
Applying and rubbing the alignment layer composition on the second substrate or rubbing directly on the second substrate, but rubbing in a horizontal direction with the surface of the second substrate at an angle of 45 ° or -45 ° to the stretching direction of the polarizing film To form a first alignment layer;
Coating a liquid crystal composition on the first alignment layer;
Irradiating ultraviolet light to the liquid crystal composition, including the step of primary curing, to prepare an optical film including a liquid crystal layer,
The liquid crystal layer has a Re (400/560) value of 0.80 <Re (400/560) <1.15 according to Equation (I) below and a mirror reflectance of 420 nm wavelength is 20% or less,
&Lt; RTI ID = 0.0 &gt;
Re (400/560) = Re (400) / Re (560)
In Equation (I), Re (400) is an in-plane retardation (nm) at 400 nm wavelength, Re (560) is an in-plane retardation (nm) at 560 nm wavelength,
The mirror reflectance of the 420nm wavelength is a method of manufacturing an optical film is a value of measuring the reflectance of the 420nm wavelength after superimposing the film on the mirror. 10. The method of claim 9,
After the first curing step,
Vertically aligning some of the liquid crystal molecules included in the liquid crystal composition by forming an electric field on the upper and lower portions of the liquid crystal composition; And
And curing the liquid in the vertically aligned state of the liquid crystal molecules. Including right eye and left eye lenses,
The right eye lens and the left eye lens,
A first substrate;
A polarizing film laminated on the first substrate;
A second substrate laminated on the polarizing film;
An alignment layer formed on the second substrate and rubbing in a horizontal direction with a surface of the second substrate at an angle of 45 ° or −45 ° with the stretching direction of the polarizing film; And
An optical film including a liquid crystal layer formed on the alignment layer, the liquid crystal layer including a horizontal alignment liquid crystal that is horizontal to a rubbing direction of the alignment layer, respectively;
The liquid crystal layer has a Re (400/560) value of 0.80 <Re (400/560) <1.15 according to Equation (I) below and a mirror reflectance of 420 nm wavelength is 20% or less,
&Lt; RTI ID = 0.0 &gt;
Re (400/560) = Re (400) / Re (560)
In Equation (I), Re (400) is an in-plane retardation (nm) at 400 nm wavelength, Re (560) is an in-plane retardation (nm) at 560 nm wavelength, and the mirror reflectance at the 420 nm wavelength is used to mirror the film to the mirror. After overlapping, the measured reflectance at 420 nm wavelength,
Stereoscopic glasses, wherein the phase difference between the liquid crystal layer of the right eye lens and the liquid crystal layer of the left eye lens is λ / 2. 12. The method of claim 11,
And the liquid crystal layer further includes a vertically aligned liquid crystal forming a vertical direction with the surface of the second substrate. A display panel for displaying a right eye image and a left eye image, respectively;
An optical filter overlapping the display panel and including a first polarization region for adjusting the polarization state of the right eye image and a second polarization region for adjusting the polarization state of the left eye image;
Including a stereoscopic glasses including a right eye lens for transmitting the right eye image and a left eye lens for transmitting the left eye image,
The right eye lens and the left eye lens,
A first substrate;
A polarizing film laminated on the first substrate;
A second substrate laminated on the polarizing film;
An alignment layer formed on the second substrate and rubbing in a horizontal direction with a surface of the second substrate at an angle of 45 ° or −45 ° with the stretching direction of the polarizing film; And
An optical film including a liquid crystal layer formed on the alignment layer, the liquid crystal layer including a horizontal alignment liquid crystal that is horizontal to a rubbing direction of the alignment layer, respectively;
The liquid crystal layer has a Re (400/560) value of 0.80 <Re (400/560) <1.15 according to Equation (I) below and a mirror reflectance of 420 nm wavelength is 20% or less,
&Lt; RTI ID = 0.0 &gt;
Re (400/560) = Re (400) / Re (560)
In Equation (I), Re (400) is an in-plane retardation (nm) at 400 nm wavelength, Re (560) is an in-plane retardation (nm) at 560 nm wavelength, and the mirror reflectance at the 420 nm wavelength is used to mirror the film to the mirror. After overlapping, the measured reflectance at 420 nm wavelength,
And a phase difference between the liquid crystal layer of the right eye lens and the liquid crystal layer of the left eye lens is λ / 2. The method of claim 13,
And the liquid crystal layer further comprises a vertically aligned liquid crystal that is perpendicular to the surface of the second substrate.

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