JP2013033083A - Optical anisotropic element, polarizing plate, image display device, and three-dimensional image display system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reduce crosstalk in an image display device including an optical anisotropic element having a patterned optical anisotropic layer with a fine pattern.SOLUTION: A patterned optical anisotropic element includes at least: a first film 14; and a laminate film including a second film and a patterned optical anisotropic layer 10 which is supported by the second film and includes a first retardation region and a second retardation region where at least either the directions of in-plane slow axes or in-plane retardations are different from each other and the first retardation region and the second retardation region are alternately arranged in the plane. The laminate film is disposed on a surface (a first surface) of the first film 14; and an area S2 of the surface (second surface) of the laminate film at the first film 14 side is smaller than an area S1 of the first surface of the first film 14.

Description

  The present invention relates to an optically anisotropic element having a high-definition alignment pattern, a polarizing plate including the optically anisotropic element, an image display device, and a stereoscopic image display system.

A stereoscopic (3D) image display device that displays a stereoscopic image requires an optical member for converting the right-eye image and the left-eye image into, for example, circularly polarized images in opposite directions. For example, such an optical member uses a patterned optical anisotropic element in which regions having different slow axes and retardations are regularly arranged in a plane.
The support of this pattern optical anisotropic element is classified into two types: a support made of glass and a support made of film, and the support made of glass is manufactured in comparison with the support made of film. It has been widely used because it has the advantage of suppressing expansion / contraction due to heating / cooling in the process, or expansion / contraction due to changes in temperature / humidity over time. In view of the above, a pattern retardation film (FPR) using a support made of a film has attracted attention.

For example, in Patent Document 1, a transparent resin film having a humidity expansion coefficient of 5 × 10 ⁻⁵ /% RH or more is used as the support, and the directions of the slow axes are different from each other and are regularly arranged in the plane of the transparent resin film. A phase difference element having a phase difference layer having two or more types of phase difference regions has been proposed. By controlling the humidity of the transparent resin film, the expansion / contraction of FPR is suppressed, and the phase difference element is displayed. Improves accuracy when pasting to the panel.

  However, after the retardation element is bonded to the display panel, the transparent resin film contracts and expands due to the change in temperature and humidity in the usage environment of the stereoscopic image display device, thereby the phase difference supported by the transparent resin film. There is a problem in that a shift occurs between the pattern of the phase difference region of the layer and the pixel and crosstalk occurs.

JP 2011-22419 A

The present invention has been made to solve the above-described problems, and it is an object to reduce crosstalk of an image display device including an optically anisotropic element having a patterned optically anisotropic layer having a fine pattern. And
Specifically, it is an object to provide an image display device in which crosstalk is reduced, and a polarizing plate, a three-dimensional image display system, and an optically anisotropic element used therefor.

Means for solving the above problems are as follows.
[1] A first retardation region and a second film, which are different from each other in at least one of an in-plane slow axis direction and an in-plane retardation, supported by the first film, the second film, and the second film. A laminated film including a phase difference region, and the first and second phase difference regions are alternately arranged in the plane,
A pattern optical anisotropic element including at least
The laminated film is disposed on the surface of the first film (hereinafter referred to as the first surface),
An optical anisotropy characterized in that an area S2 of the first film side surface (hereinafter referred to as a second surface) of the laminated film is smaller than an area S1 of the first surface of the first film. element.
[2] On the first surface of the first film, there are a central portion where the laminated film is disposed and a peripheral portion surrounding the central portion where the laminated film is not disposed. An optically anisotropic element.
[3] The optically anisotropic element according to [1] or [2], wherein the first film and the second film are arranged with their in-plane slow axes orthogonal to each other.
[4] The optically anisotropic element according to any one of [1] to [3], wherein the in-plane retardation Re (550) at a wavelength of 550 nm of each of the first film and the second film is 20 nm or less.
[5] Either one of the first film and the second film has an in-plane slow axis in a direction parallel to the MD direction, and the other has an in-plane slow phase in a direction parallel to the TD direction. The optically anisotropic element according to any one of [1] to [4], which has an axis.
[6] The optically anisotropic element according to any one of [1] to [5], having an antireflection layer on a surface opposite to the first surface of the first film.
[7] The optically anisotropic element according to any one of [1] to [6], wherein the second film is disposed on the surface of the first film via the pressure-sensitive adhesive layer.
[8] The optically anisotropic element according to any one of [1] to [6], wherein the second film is disposed on the surface of the first film via the adhesive layer.
[9] The area ratio S1 / S2 between the area S2 of the second surface of the second film and the area S1 of the first surface of the laminated film is 1.01 to 1.30 [1]. Optical anisotropic element in any one of-[8].
[10] A polarizing plate having at least a polarizing film and the optically anisotropic element according to any one of [1] to [9].
[11] A display panel driven based on an image signal;
An image display device having at least an optically anisotropic element disposed on the viewing side of the display panel,
From the viewing side, the optical anisotropic element is
The first retardation region and the second retardation region, which are supported by the first film, the second film, and the second film, wherein at least one of the in-plane slow axis direction and the in-plane retardation is different from each other. A laminated film having a patterned optically anisotropic layer in which the first and second retardation regions are alternately arranged in a plane,
An optically anisotropic element including at least
The laminated film is disposed on the surface of the first film (hereinafter referred to as the first surface),
On the first surface of the first film, there is a central portion where the laminated film is disposed, and a peripheral portion surrounding the central portion where the laminated film is not disposed,
The image display apparatus by which the peripheral part of the said 1st film is bonded by the said display panel.
[12] The image display device according to [11], wherein a peripheral portion of the first film is bonded to the display panel via an adhesive layer.
[13] The image display device according to [11], wherein a peripheral portion of the first film is bonded to the display panel via an adhesive layer.
[14] The image display device according to any one of [11] to [13], wherein a polarizing film is provided between the optically anisotropic element and the display panel.
[15] The image display device according to any one of [11] to [14], wherein the display panel includes a liquid crystal cell.
[16] A stereoscopic image display system including at least the image display device according to any one of [11] to [15] and a polarizing plate disposed on a viewing side of the image display device, and allowing a stereoscopic image to be visually recognized through the polarizing plate. .

ADVANTAGE OF THE INVENTION According to this invention, the crosstalk of an image display apparatus provided with the optically anisotropic element which has a pattern optically anisotropic layer which has a fine pattern can be reduced.
Specifically, it is possible to provide an image display device in which crosstalk is reduced, and a polarizing plate, a stereoscopic image display system, and an optically anisotropic element used therefor.

It is a cross-sectional schematic diagram of an example of the optically anisotropic element of this invention. It is a cross-sectional schematic diagram of an example of the optically anisotropic element of this invention which has a surface layer which consists of a cured film in an outer surface. It is a cross-sectional schematic diagram of an example of the optical anisotropic element of this invention whose surface layer is a hard-coat layer and an antireflection layer. It is the schematic of an example of the relationship between the film which has a slow axis in MD direction, and the film which has a slow axis in TD direction. It is the upper surface schematic of an example of the relationship between the center part of a 1st film, and a peripheral part. It is an upper surface schematic diagram of an example of pattern (lambda) / 4 layer. It is a cross-sectional schematic diagram of an example of the image display apparatus which has the optically anisotropic element shown in FIG. 3 in the visual recognition side. It is the upper surface schematic of an example of the relationship between a display panel, FPR, and a 1st film. It is a cross-sectional schematic diagram of an example of the image display apparatus of this invention. It is the schematic of an example of the relationship between a polarizing film and an optically anisotropic layer. It is the schematic used in order to demonstrate the evaluation method performed in the Example.

  Hereinafter, the present invention will be described in detail. In the present specification, a numerical range represented by using “to” means a range including numerical values described before and after “to” as a lower limit value and an upper limit value. First, terms used in this specification will be described.

Re (λ) and Rth (λ) represent in-plane retardation at wavelength λ and retardation in the thickness direction, respectively. Re (λ) is measured with KOBRA 21ADH or WR (manufactured by Oji Scientific Instruments) by making light of wavelength λ nm incident in the normal direction of the film. In selecting the measurement wavelength λnm, the wavelength selection filter can be exchanged manually, or the measurement value can be converted by a program or the like. When the film to be measured is represented by a uniaxial or biaxial refractive index ellipsoid, Rth (λ) is calculated by the following method.
Rth (λ) is the film surface when Re (λ) is used and the in-plane slow axis (determined by KOBRA 21ADH or WR) is the tilt axis (rotation axis) (if there is no slow axis) Measurement is performed at a total of 6 points by injecting light of wavelength λ nm from each inclined direction in steps of 10 degrees from the normal direction to 50 ° on one side with respect to the film normal direction (with any rotation direction as the rotation axis). Then, KOBRA 21ADH or WR is calculated based on the measured retardation value, the assumed value of the average refractive index, and the input film thickness value. In the above case, in the case of a film having a direction in which the retardation value is zero at a certain tilt angle with the in-plane slow axis from the normal direction as the rotation axis, retardation at a tilt angle larger than the tilt angle. The value is calculated by KOBRA 21ADH or WR after changing its sign to negative. The retardation value is measured from two inclined directions with the slow axis as the tilt axis (rotation axis) (if there is no slow axis, the arbitrary direction in the film plane is the rotation axis). Rth can also be calculated from the following formula (A) and formula (B) based on the value, the assumed value of the average refractive index, and the input film thickness value.

なお、上記のＲｅ（θ）は法線方向から角度θ傾斜した方向におけるレターデーション値を表す。また、式（Ａ）におけるｎｘは、面内における遅相軸方向の屈折率を表し、ｎｙは、面内においてｎｘに直交する方向の屈折率を表し、ｎｚは、ｎｘ及びｎｙに直交する方向の屈折率を表す。ｄは測定フィルムの厚みを示す。
Ｒｔｈ＝（（ｎｘ＋ｎｙ）／２−ｎｚ）×ｄ・・・・・・・・・・・式（Ｂ）

Note that Re (θ) represents a retardation value in a direction inclined by an angle θ from the normal direction. In the formula (A), nx represents the refractive index in the slow axis direction in the plane, ny represents the refractive index in the direction orthogonal to nx in the plane, and nz is the direction orthogonal to nx and ny. Represents the refractive index. d shows the thickness of a measurement film.
Rth = ((nx + ny) / 2−nz) × d (Equation (B)

  When the film to be measured is a film that cannot be expressed by a uniaxial or biaxial refractive index ellipsoid, that is, a film without a so-called optical axis, Rth (λ) is calculated by the following method. Rth (λ) is from −50 ° to the normal direction of the film, with Re (λ) being the in-plane slow axis (determined by KOBRA 21ADH or WR) as the tilt axis (rotary axis). Measured at 11 points by making light of wavelength λ nm incident in 10 ° steps up to + 50 °, and based on the measured retardation value, average refractive index assumption value and input film thickness value. KOBRA 21ADH or WR is calculated. In the above measurement, as the assumed value of the average refractive index, values in the polymer handbook (John Wiley & Sons, Inc.) and catalogs of various optical films can be used. If the average refractive index is not known, it can be measured with an Abbe refractometer. The average refractive index values of main optical films are exemplified below: cellulose acylate (1.48), cycloolefin polymer (1.52), polycarbonate (1.59), polymethyl methacrylate (1.49), Polystyrene (1.59). The KOBRA 21ADH or WR calculates nx, ny, and nz by inputting the assumed value of the average refractive index and the film thickness. Nz = (nx−nz) / (nx−ny) is further calculated from the calculated nx, ny, and nz.

In the present specification, “visible light” means 380 nm to 780 nm. Moreover, in this specification, when there is no special mention about a measurement wavelength, a measurement wavelength is 550 nm.
Further, in the present specification, regarding the angle (for example, an angle such as “90 °”) and the relationship (for example, “orthogonal”, “parallel”, “crossing at 45 °”, etc.), the technical field to which the present invention belongs. The range of allowable error is included. For example, it means that the angle is within the range of strict angle ± 10 °, and the error from the strict angle is preferably 5 ° or less, and more preferably 3 ° or less.
Further, “MD direction” means a film feeding direction in continuous production, and “TD direction” means a direction perpendicular to the film feeding direction.

The present invention relates to a first film, a second film, a first retardation region and a first retardation region, which are supported by the second film, and which are different from each other in at least one of an in-plane slow axis direction and an in-plane retardation. A laminated film having a pattern optically anisotropic layer including two retardation regions, and the first and second retardation regions are alternately arranged in a plane;
A pattern optical anisotropic element including at least
The laminated film is disposed on the surface of the first film (hereinafter referred to as the first surface),
An optical anisotropy characterized in that an area S2 of the first film side surface (hereinafter referred to as a second surface) of the laminated film is smaller than an area S1 of the first surface of the first film. It relates to an element.

The present invention also provides a display panel that is driven based on an image signal;
An image display device having at least an optically anisotropic element disposed on the viewing side of the display panel,
From the viewing side, the optical anisotropic element is
The first retardation region and the second retardation region, which are supported by the first film, the second film, and the second film, wherein at least one of the in-plane slow axis direction and the in-plane retardation is different from each other. A laminated film having a patterned optically anisotropic layer in which the first and second retardation regions are alternately arranged in a plane,
An optically anisotropic element including at least
The laminated film is disposed on the surface (first surface) of the first film,
On the first surface of the first film, there is a central portion where the laminated film is disposed, and a peripheral portion surrounding the central portion where the laminated film is not disposed,
The peripheral part of the first film also relates to an image display device bonded to the display panel.

  One embodiment of the present invention is a patterned optical anisotropic element that is disposed on the viewing side of a display panel and is used for displaying a stereoscopic image. Specifically, the optical anisotropic element is disposed on the outside of the viewing side of the display panel together with the polarizing film (if the display panel has a polarizing film on the viewing side, further outside of the viewing side polarizing film of the display panel). The polarized images that have passed through each of the first and second phase difference regions are recognized as images for the right eye or the left eye through polarized glasses or the like.

  FPR using a film for the support of the patterned optically anisotropic layer has various advantages such as excellent handleability by using a rigid glass plate. On the other hand, unlike a glass plate, Shrinks and expands due to changes. In FPR, the pattern optical anisotropic layer supported by the support film is deformed following the shrinkage and expansion of the support film. Even if the pixel of the display panel and the pattern optically anisotropic layer are aligned with high accuracy, the pixel due to the subsequent shrinkage / expansion of the support film and the deformation of the patterned optically anisotropic layer following the support film And pattern misalignment occur, which contributes to the occurrence of crosstalk.

  In the present invention, since the surface of the FPR is bonded to the surface of the first film, which is larger than the surface area, the center of the FPR is disposed on the surface of the first film, and the center There is a peripheral portion surrounding the portion where no FPR is arranged. Since the optically anisotropic element of the present invention has this peripheral part, when the FPR is set to the display panel side and the optically anisotropic element is bonded to the display panel, the peripheral part of the first film Can also be bonded to the display panel, so that the fixation of the FPR becomes stronger. Accordingly, deformation of the FPR due to temperature and humidity can be suppressed, and occurrence of crosstalk can be reduced.

  Hereinafter, some embodiments of the present invention will be described with reference to the drawings. However, the relative relationships of the thicknesses of the layers in the drawings do not reflect actual relative relationships. In the drawings, the same members are denoted by the same reference numerals, and detailed description may be omitted.

  A schematic cross-sectional view of an example of the optically anisotropic element of the present invention is shown in FIG. The optically anisotropic element shown in FIG. 1 includes a laminated film (FPR) having a patterned optically anisotropic layer 10 and a support film (second film) 12 that supports the patterned optically anisotropic layer 10, and a first film 14. Have. FPR is arrange | positioned on the surface (1st surface) of the 1st film 14, and the support body film 12 and the 1st film 14 are through the adhesive layer 13 in the example shown in FIG. Are stacked. Since the area S2 of the surface (second surface) on the first film 14 side of the FPR is smaller than the area S1 of the first surface, the first surface includes a central portion where the FPR is disposed and , There is a peripheral portion surrounding the central portion, that is, the FPR is not disposed. An adhesive layer may be used instead of the pressure-sensitive adhesive layer 13.

  For example, in the aspect in which the central part is rectangular (that is, the aspect in which the FPR is rectangular), the peripheral part is surrounded in all four directions of the rectangular central part, that is, adjacent to the four sides. It is preferable. However, the present invention is not limited to this mode. For example, the peripheral portion surrounds the central portion in three directions, that is, the peripheral portion may be present only adjacent to three sides, or the peripheral portion is surrounded in two directions. That is, it may exist adjacent to only two sides. 4A and 4B are schematic top views of an example of the first surface. An example of the first surface is a mode in which the entire central part is surrounded by a peripheral part as shown in FIG. 4A, and another example is as shown in FIG. In this aspect, at least two sides are surrounded by the peripheral edge. The magnitude | size of a peripheral part should just be a grade which can be bonded with the display panel mentioned later.

  The light that has passed through the first and second retardation regions of the patterned optically anisotropic layer 10 is converted into predetermined polarized light determined by the retardation of each region and the direction of the slow axis. And a polarization image for the left eye is formed.

  An example of the arrangement of the support film (second film) 12 and the first film 14 is an arrangement in which the in-plane slow axes are orthogonal to each other. By arranging the in-plane slow axes to be orthogonal to each other, the effect of reducing crosstalk can be obtained. Each direction of the in-plane slow axis is not particularly limited, but as schematically shown in FIG. 5, one of the support film 12 and the first film 14 has a slow axis in the MD direction. It is preferable that the other film has a slow axis in the TD direction because the film can be laminated by a roll-to-roll method and an optically anisotropic element can be easily produced.

  In general, the slow axis of the film is parallel to or perpendicular to the direction in which molecules are arranged by stretching or the like. Films generally tend to undergo dimensional changes in a direction perpendicular to the direction in which the molecules are arranged. Therefore, as the support film 12 and the first film 14, two films having an in-plane slow axis in a direction parallel to the molecular arrangement direction, or an in-plane slow phase in a direction orthogonal to the molecule arrangement direction. By laminating two films having axes with the in-plane slow axes orthogonal to each other via the pressure-sensitive adhesive layer, it is possible to reduce fluctuations in optical properties due to dimensional changes as the entire optical anisotropic element, Furthermore, the crosstalk caused by it can be further reduced.

  Re (550) of the support film 12 and the first film 14 is preferably 20 nm or less, and more preferably 5 nm or less. When Re (550) of the support film 12 and the first film 14 is 20 nm or less, the cancellation of retardation due to the in-plane slow axis being orthogonal is more complete, and crosstalk is further reduced. can do.

  The area ratio (S1 / S2) between the area S2 of the second surface and the area S1 of the first surface is preferably 1.01-1.30, more preferably 1.02-1.20. 0.03 to 1.10. Although the details will be described later when the area ratio is 1.01 or less, the FPR cannot be firmly fixed because it is difficult to bond the peripheral portion of the first surface and the display panel, and the environmental temperature of the FPR Shrinkage / expansion due to humidity may not be prevented, and if it exceeds 1.30, the peripheral cost may increase and the material cost may increase.

  Since the optically anisotropic element of the present invention is disposed outside the viewing side of the display panel, as shown in an example in FIG. 2, it has a function of protecting from a physical impact from the outside, or reflection of external light. It is preferable that the surface layer 15 having a function of preventing the above is disposed on the surface opposite to the surface (second surface) on which the FPR of the first film 14 is disposed. Examples of the surface layer 15 include a hard coat layer and an antireflection layer using the first film 14 as a support, and an example of the surface layer includes the hard coat layer 15a and the antireflection layer 15b shown in FIG. It is an example. Further, the surface layer 15 may include three or more layers.

  1 to 3, the patterned optically anisotropic layer 10 includes a first retardation region and a second retardation region in which at least one of the in-plane slow axis direction and the in-plane retardation is different from each other. A polarized image that has passed through each of the first and second phase difference regions is recognized as an image for the right eye or the left eye through polarized glasses or the like. Therefore, it is preferable that the first and second phase difference regions have the same shape so that the left and right images do not become non-uniform, and that the respective arrangements are preferably uniform and symmetrical.

  An example of the patterned optically anisotropic layer is a λ / 4 layer in which the in-plane retardation Re of the first and second retardation regions is λ / 4, and the slow axes of each region are orthogonal to each other. It is a λ / 4 layer. 6A and 6B are schematic top views of an example of the pattern λ / 4 layer. The in-plane retardations of the first and second retardation regions 1a and 1b in FIGS. 6A and 6B are about λ / 4, respectively, and the in-plane slow axes a and b orthogonal to each other are respectively set. It has a pattern λ / 4 layer. When the patterned optically anisotropic layer of this aspect is combined with a polarizing film, the light that has passed through each of the first and second retardation regions becomes a circularly polarized state in opposite directions, and is used for the right eye and the left eye, respectively. A circularly polarized image is formed.

  The patterned optically anisotropic layer is not limited to the above embodiment. A patterned optically anisotropic layer in which the in-plane retardation of one of the first and second retardation regions is λ / 4 and the other in-plane retardation is 3λ / 4 can be used. Further, a patterned optical anisotropic layer in which one in-plane retardation of the first and second retardation regions 1a and 1b is λ / 2 and the other in-plane retardation is 0 can be used. .

  Further, the shape and arrangement pattern of the first and second phase difference regions 1a and 1b are not limited to the aspect in which the stripe pattern shown in FIG. 6 is alternately arranged. For example, rectangular patterns may be arranged in a grid pattern.

  The patterned optically anisotropic layer may have a single layer structure or a laminated structure of two or more layers. The patterned optically anisotropic layer can be formed from one or two types of compositions mainly containing a liquid crystal compound having a polymerizable group.

  Further, the in-plane slow axis of each pattern of the optically anisotropic layer can be adjusted to different directions, for example, directions orthogonal to each other by using a pattern alignment film or the like. As the pattern alignment film, both an optical alignment film capable of forming a patterning alignment film by mask exposure and a rubbing alignment film capable of forming a patterning alignment film by mask rubbing can be used. In addition, an alignment control technique based on nanoimprinting can be used without using a pattern alignment film.

  The optically anisotropic element of the present invention is not limited to the embodiments shown in FIGS. 1 to 3 and may include other members. For example, an alignment film may be provided between the support film and the patterned optically anisotropic layer. Further, on the outer surface, a front scattering layer, a primer layer, an antistatic layer, an undercoat layer and the like may be disposed together with (or instead of) a surface layer such as a hard coat layer and an antireflection layer.

  The present invention also relates to a polarizing plate. The polarizing plate of the present invention has at least a polarizing film and the optically anisotropic element of the present invention. Preferably, the pattern optically anisotropic layer and the polarizing film of the optically anisotropic element of the present invention are bonded together.

  FIG. 7 shows a schematic cross-sectional view of an example of an image display device including a polarizing plate having the optical anisotropic element shown in FIG. In the polarizing plate shown in FIG. 7, the polarizing film 16 is disposed on the surface of the patterned optically anisotropic layer 10 of the optically anisotropic element. No other layer is disposed between the patterned optically anisotropic layer 10 and the polarizing film 16, or only an optically isotropic layer (for example, an adhesive layer or an adhesive layer) is disposed. It is preferable.

  In each example in which the patterned optically anisotropic layer 10 is the pattern λ / 4 layer shown in FIGS. 6A and 6B, as shown in FIGS. 10A and 10B, the first and the first The in-plane slow axes a and b of the two phase difference regions 1a and 1b are arranged so as to be ± 45 ° with respect to the transmission axis p of the polarizing film 16, respectively. In the present specification, it is not strictly required that the angle is ± 45 °, and any one of the first and second phase difference regions 1a and 1b is preferably 40 to 50 °, and the other is -50 to -40 °. With this configuration, it is possible to separate right-eye and left-eye circularly polarized images. Further, the viewing angle may be further increased by further laminating λ / 2 plates. Further, the transmission axis of the polarizing film and the slow axis of one of the support film and the first film are preferably parallel, and the other is preferably orthogonal. That is, in the example of FIG. 10A, it is preferable that one of the slow axes of the support film and the first film is the MD direction and the other is the TD direction. In the example of FIG. One of the slow axes of the support film and the first film is preferably 45 ° with respect to the MD direction and the other with 135 ° with respect to the MD direction.

  FIG. 7 shows a schematic cross-sectional view of an example of the image display device of the present invention. The image display device shown in FIG. 7 includes an optically anisotropic element, a polarizing film, and a display panel from the viewing side. The optically anisotropic element includes a laminated film (FPR) having a patterned optically anisotropic layer 10 and a support film (second film) 12 that supports the patterned optically anisotropic layer 10 and a first film 14. The FPR is disposed on the surface (first surface) of the first film 14, and the area S2 of the surface (second surface) on the first film 14 side of the FPR is the area of the first surface. It is smaller than S1. For this reason, the first surface has a central portion where the FPR is disposed and a peripheral portion surrounding the central portion, that is, the FPR is not disposed.

  Since the central portion and the peripheral portion are present on the first surface, the peripheral portion of the first surface can be directly bonded to the display panel as schematically shown in FIGS. Become. An example of the bonding between the peripheral portion of the first surface and the display panel is as shown in FIG. 9A and FIG. 9B, and the peripheral portion and the display panel are bonded via an adhesive or an adhesive. Paste. Since the peripheral edge is directly bonded to the display panel via an adhesive or an adhesive, the FPR can be more firmly fixed and the FPR can be prevented from expanding and contracting due to environmental temperature and humidity. Note that the adhesive can be fixed more firmly than the adhesive. Further, as shown in FIG. 9 (c) and FIG. 9 (d), the FPR may be disposed so as to cover the side surface of the FPR at the peripheral edge, and the peripheral edge and the display panel may be bonded with an adhesive or an adhesive. Good. The area of the surface on the viewing side of the display panel is not particularly limited, but is preferably equal to the area of the first surface.

  The optically anisotropic element is disposed on the viewing-side surface of the display panel and separates incident polarized light into right-eye and left-eye polarized images (for example, circularly polarized images). An observer observes these polarized images through a polarizing plate such as polarized glasses (for example, circular polarized glasses) and recognizes them as a stereoscopic image. The optically anisotropic element used in the image display device of the present invention is preferably the optically anisotropic element of the present invention.

  As shown in FIG. 7, the optically anisotropic element of the present invention is disposed on the viewing side surface of the display panel together with the polarizing film. However, when the display panel has the polarizing film on the viewing side, there is no polarizing film. May be. Further, as shown in FIG. 7, on the display panel having the polarizing film on the viewing side, in the embodiment in which the optical anisotropic element of the present invention is disposed together with the polarizing film, the transmission axis of the polarizing film is set to the display panel. It arrange | positions so that it may correspond with the transmission axis of the polarizing film arrange | positioned at the side.

  In the present invention, there is no limitation on the display panel. For example, it may be a liquid crystal panel including a liquid crystal layer, an organic EL display panel including an organic EL layer, or a plasma display panel. For any aspect, various possible configurations can be employed. In addition, the liquid crystal panel or the like has a polarizing film for image display on the surface on the viewing side, but as described above, the optical anisotropic element of the present invention achieves the above function by combination with the polarizing film. Good.

  An example of the display panel is a transmissive mode liquid crystal panel, which includes a pair of polarizing films and a liquid crystal cell therebetween. A retardation film for viewing angle compensation is usually disposed between each of the polarizing films and the liquid crystal cell. There is no restriction | limiting in particular about the structure of a liquid crystal cell, The liquid crystal cell of a general structure is employable. The liquid crystal cell includes, for example, a pair of substrates disposed opposite to each other and a liquid crystal layer sandwiched between the pair of substrates, and may include a color filter layer as necessary. The driving mode of the liquid crystal cell is not particularly limited, and is twisted nematic (TN), super twisted nematic (STN), vertical alignment (VA), in-plane switching (IPS), optically compensated bend cell (OCB). Various modes such as can be used.

  The present invention also relates to a stereoscopic image display system that includes at least the image display device of the present invention and a polarizing plate disposed on the viewing side of the image display device, and allows a stereoscopic image to be visually recognized through the polarizing plate. An example of the polarizing plate disposed outside the viewing side of the image display device is polarized glasses worn by an observer. The observer observes the right-eye and left-eye polarized images displayed by the image display device through circularly or linearly polarized glasses and recognizes them as a stereoscopic image.

  Hereinafter, various members used in the optically anisotropic element of the present invention will be described in detail.

<Optical anisotropic element>
In the optically anisotropic element of the present invention, a laminated film (FPR) having a support film (second film) and a patterned optically anisotropic layer is disposed on the surface of the first film. There is no particular limitation on the manufacturing method. For example, as in the example shown in FIGS. 1 to 3, in the embodiment in which the FPR support film and the first film are bonded via an adhesive layer, the surface of the support film is patterned optically anisotropic. An FPR is formed once by forming an adhesive layer, and the first film is provided on the back surface of the FPR (the surface on the side where the patterned optically anisotropic layer of the support film is not formed) via an adhesive layer. May be pasted. Moreover, also about the 1st film, the surface layer, a protective layer, etc. are formed in the surface once, and a surface film is once produced, and the back surface (the side where the protective layer of the 1st film is not formed) of this surface film Surface) and the back surface of the FPR may be bonded via an adhesive layer. Of course, after a support body film and a 1st film are previously bonded through an adhesive layer, you may form a pattern optically anisotropic layer and a surface layer etc. as needed. Furthermore, an adhesive layer may be used instead of the pressure-sensitive adhesive layer.

<First and second films>
There is no restriction | limiting in particular about the manufacturing method of a 1st film and a support body film (2nd film). Either a solution casting method or a melt casting method can be used. A solution casting method is preferred. As the support film and the first film, a low Re polymer film is preferably used, and a preferable combination of the support film and the first film is a combination having a small difference in Re. The preferable range of Re and the preferable range of the difference of Re are as described above.

  Examples of the material for forming the support film and the first film that can be used in the present invention include polycarbonate polymers, polyester polymers such as polyethylene terephthalate and polyethylene naphthalate, acrylic polymers such as polymethyl methacrylate, polystyrene, Examples thereof include styrenic polymers such as acrylonitrile / styrene copolymer (AS resin). Polyolefins such as polyethylene and polypropylene, polyolefin polymers such as ethylene / propylene copolymers, vinyl chloride polymers, amide polymers such as nylon and aromatic polyamide, imide polymers, sulfone polymers, polyethersulfone polymers , Polyether ether ketone polymers, polyphenylene sulfide polymers, vinylidene chloride polymers, vinyl alcohol polymers, vinyl butyral polymers, arylate polymers, polyoxymethylene polymers, epoxy polymers, or polymers mixed with the above polymers Take an example. The polymer film of the present invention can also be formed as a cured layer of an ultraviolet-curable or thermosetting resin such as acrylic, urethane, acrylic urethane, epoxy, or silicone.

  In addition, as a material for the support film and the first film, a thermoplastic norbornene resin can be preferably used. Examples of the thermoplastic norbornene-based resin include ZEONEX, ZEONOR manufactured by Nippon Zeon Co., Ltd., and ARTON manufactured by JSR Corporation.

Moreover, as a material of the said support body film and a 1st film, the cellulose polymer (henceforth a cellulose acylate) represented by the triacetyl cellulose conventionally used as a transparent protective film of a polarizing plate is preferable. Can be used.
The support film and the first film may be different materials or the same material.

[Stretching]
The support film and the first film may be stretched films that have been stretched. The retardation and the in-plane slow axis can be adjusted by the stretching treatment. As described above, it is preferable that one of the support film and the first film is a film having a slow axis in the MD direction and the other having a slow axis in the TD direction. In general, a film having a slow axis in the MD direction can be produced by stretching in the MD direction, and a film having a slow axis in the TD direction can be produced by stretching in the TD direction.
Examples of a method of positively stretching in the width direction (TD direction) include, for example, JP-A-62-115035, JP-A-4-152125, JP-A-4-284221, JP-A-4-298310, and JP-A-11-298310. -48271, and the like. The film is stretched at room temperature or under heating conditions. The heating temperature is preferably −20 ° C. to + 100 ° C. sandwiching the glass transition temperature of the film. If the film is stretched at a temperature extremely lower than the glass transition temperature, it tends to break and cannot exhibit desired optical properties. In addition, when stretching at a temperature extremely higher than the glass transition temperature, it is not possible to fix the orientation by relaxing with the heat during stretching before the molecularly oriented material by stretching is heat-set. Becomes worse.

The stretching of the film may be uniaxial stretching only in the MD direction or TD direction, or simultaneous or sequential biaxial stretching, but it is preferable to stretch more in the TD direction. Stretching in the TD direction is preferably 1 to 100% stretching, more preferably 10 to 70% stretching, and particularly preferably 20% to 60% stretching. Stretching in the MD direction is preferably 1 to 10%, particularly preferably 2 to 5%.
The stretching process may be performed in the middle of the film forming process, or the original fabric that has been formed and wound may be stretched.
When stretching is performed in the middle of the film forming process, stretching may be performed in a state including the residual solvent amount, and the residual solvent amount = (residual volatile matter mass / heat-treated film mass) × 100% is 0.05. It can be preferably stretched at -50%.
In the case of stretching the raw film that has been formed and wound, it is preferable to stretch 1 to 100% in the TD direction with the residual solvent amount being 0 to 5%, more preferably 10 to 70%. The stretching is particularly preferably 20% to 60%.

The stretching process may be performed in the middle of the film forming process, and the original film that has been formed and wound may be further stretched.
In the case of further stretching after winding the film stretched in the middle of the film forming process, the stretching in the middle of the film forming process may be performed in a state including the amount of residual solvent, Solvent amount = (residual volatile matter mass / film mass after heat treatment) × 100% is preferably stretched at 0.05 to 50%, and the stretch of the original film formed and wound up has a residual solvent amount of 0 It is preferable to stretch in a state of ˜5%, and the stretching in the TD direction is preferably performed in a range of 1 to 100% based on the unstretched state, more preferably 10 to 70%, and particularly preferably 20%. ~ 60% stretch.

The support film and the first film may be biaxially stretched.
Biaxial stretching includes simultaneous biaxial stretching and sequential biaxial stretching, but sequential biaxial stretching is preferred from the viewpoint of continuous production, and after casting the dope, the film is peeled off from the band or drum, After stretching in the TD direction, the film is stretched in the MD direction, or after stretching in the MD direction, the film is stretched in the TD direction.
In order to relieve residual strain in stretching, reduce dimensional change, and to reduce variation of the in-plane slow axis in the TD direction, it is preferable to provide a relaxation step after transverse stretching. In the relaxation step, it is preferable to adjust the width of the film after relaxation to a range of 100 to 70% (relaxation rate of 0 to 30%) with respect to the width of the film before relaxation. The temperature in the relaxation step is preferably an apparent glass transition temperature Tg-50 to Tg + 50 ° C. of the film. In normal stretching, in the relaxation rate zone after passing through this maximum widening rate, the time until it passes through the tenter zone is shorter than 1 minute.
Here, the apparent Tg of the film in the stretching process is that the film containing the residual solvent is enclosed in an aluminum pan, and the temperature is increased from 25 ° C. to 200 ° C. at 20 ° C./min with a differential scanning calorimeter (DSC). Tg was determined by determining an endothermic curve.

When the stretching process is performed during the film forming process, the film can be dried while being conveyed. The drying temperature is preferably 100 ° C to 200 ° C, more preferably 100 ° C to 150 ° C, still more preferably 110 ° C to 140 ° C, and particularly preferably 130 ° C to 140 ° C. The drying time is not particularly limited, but is preferably 10 to 40 minutes.
By selecting the optimal post-stretching drying temperature, the residual stress of the produced cellulose ester film is relaxed, and the dimensional change, optical property change, and slow axis orientation change under high temperature and high temperature and high humidity are reduced. be able to.

  When the raw film that has been formed and wound is stretched, the stretched film may be manufactured through a process of further heat treatment. By undergoing the heat treatment step, the residual stress of the produced support film and the first film is alleviated, and dimensional changes, optical characteristics changes, and slow axis orientation changes under high temperature and high temperature and high humidity. Since it becomes small, it is preferable. Although the temperature at the time of a heating does not have a restriction | limiting in particular, 100 to 200 degreeC is preferable.

<Adhesive layer>
The pressure-sensitive adhesive layer is formed by laminating and integrating the FPR and the first film, and is preferably optically isotropic. Examples of the pressure-sensitive adhesive capable of forming an optically isotropic pressure-sensitive adhesive layer include acrylate-based pressure-sensitive adhesives. Moreover, as long as a support body film and a 1st film can be bonded and integrated, generally the agent classified into an adhesive agent may be utilized.

  Moreover, it is preferable that also about the adhesive which bonds the peripheral part of a 1st film and a display panel, it is optically isotropic like the adhesive of an adhesive layer. Different materials may be sufficient as the adhesive which bonds the peripheral part of a 1st film, and a display panel, and the adhesive used for an adhesive layer, and the same material may be sufficient as it.

<Adhesive layer>
In the present invention, an adhesive layer may be used instead of the pressure-sensitive adhesive layer. Since the adhesive bonds the FPR and the first film by chemical or physical force, the FPR and the first film can be fixed more firmly than the adhesive. Examples of adhesives that can form an optically isotropic adhesive layer include synthetic adhesives such as acrylic resin adhesives.

  In addition, an adhesive may be used instead of the pressure-sensitive adhesive that bonds the peripheral edge of the first film and the display panel, and is optically isotropic like the pressure-sensitive adhesive of the pressure-sensitive adhesive layer. preferable. Different materials may be sufficient as the adhesive agent which bonds the peripheral part and display panel of a 1st film, and an adhesive layer, and the same material may be sufficient as it.

<Pattern optical anisotropic layer>
There is no restriction | limiting in particular about the material of a pattern optically anisotropic layer, Retardation films, such as a composition which has a liquid crystal compound which has a polymeric group as a main component, a stretched film, etc. can be utilized. Since the optically anisotropic layer needs to be patterned, it is preferable to use a composition containing a liquid crystal compound having a polymerizable group as a main component from the viewpoint of easy patterning.

The optically anisotropic layer can be formed by various methods using an alignment film, and the production method is not particularly limited.
The first aspect uses a plurality of actions that affect the alignment control of the liquid crystal, and then eliminates any action by an external stimulus (such as heat treatment) to make the predetermined alignment control action dominant. It is. For example, the liquid crystal is brought into a predetermined alignment state by the combined action of the alignment control ability by the alignment film and the alignment control ability of the alignment control agent added to the liquid crystal composition, and one phase difference region is fixed by fixing it. After forming, by external stimulus (heat treatment, etc.), one of the actions (for example, the action by the alignment control agent) disappears, and the other orientation control action (the action by the alignment film) becomes dominant, thereby other orientations. The state is realized and fixed to form the other phase difference region. For example, a predetermined pyridinium compound or imidazolium compound is unevenly distributed on the surface of the hydrophilic polyvinyl alcohol alignment film because the pyridinium group or imidazolium group is hydrophilic. In particular, if the pyridinium group is further substituted with an amino group that is a substituent of an acceptor of a hydrogen atom, intermolecular hydrogen bonds are generated with polyvinyl alcohol, and are unevenly distributed on the surface of the alignment film at a higher density. At the same time, due to the effect of hydrogen bonding, the pyridinium derivative is aligned in the direction orthogonal to the main chain of polyvinyl alcohol, so that the orthogonal alignment of the liquid crystal is promoted relative to the rubbing direction. Since the pyridinium derivative has a plurality of aromatic rings in the molecule, a strong intermolecular π-π interaction occurs between the liquid crystal, particularly the discotic liquid crystal, and the alignment film of the discotic liquid crystal. Induces orthogonal orientation near the interface. In particular, when a hydrophobic aromatic ring is connected to a hydrophilic pyridinium group, it also has an effect of inducing vertical alignment due to the hydrophobic effect. However, the effect is that when heated above a certain temperature, the hydrogen bond is broken, the density of the pyridinium compound or the like on the surface of the alignment film is lowered, and the action disappears. As a result, the liquid crystal is aligned by the regulating force of the rubbing alignment film itself, and the liquid crystal is in a parallel alignment state. Details of this method are described in Japanese Patent Application No. 2010-141345, the contents of which are incorporated herein by reference.

  In the second aspect, a pattern alignment film is used. In this embodiment, pattern alignment films having different alignment control capabilities are formed, and a liquid crystal composition is disposed thereon to align the liquid crystal. The alignment of the liquid crystal is regulated by the respective alignment control ability of the pattern alignment film, thereby achieving different alignment states. By fixing the respective alignment states, the patterns of the first and second retardation regions are formed according to the alignment film pattern. The pattern alignment film can be formed using a printing method, mask rubbing for the rubbing alignment film, mask exposure for the photo alignment film, or the like. Alternatively, the alignment film can be formed uniformly, and an additive that affects the alignment control ability (for example, the onium salt or the like) can be separately printed in a predetermined pattern to form the pattern alignment film. A method using a printing method is preferable in that large-scale equipment is not required and manufacturing is easy. Details of this method are described in Japanese Patent Application No. 2010-173077, the contents of which are incorporated herein by reference.

  Moreover, you may use the 1st and 2nd aspect together. An example is an example in which a photoacid generator is added to the alignment film. In this example, a photoacid generator is added to the alignment film, and pattern exposure exposes a region where the photoacid generator is decomposed to generate an acidic compound and a region where no acid compound is generated. The photoacid generator remains almost undecomposed in the unirradiated portion, and the interaction between the alignment film material, the liquid crystal, and the alignment control agent added as required dominates the alignment state, and the liquid crystal has its slow axis. Is oriented in a direction perpendicular to the rubbing direction. When the alignment film is irradiated with light and an acidic compound is generated, the interaction is no longer dominant, the rubbing direction of the rubbing alignment film dominates the alignment state, and the liquid crystal has its slow axis parallel to the rubbing direction. Parallel orientation. As the photoacid generator used for the alignment film, a water-soluble compound is preferably used. Examples of photoacid generators that can be used include Prog. Polym. Sci. , 23, 1485 (1998). As the photoacid generator, pyridinium salts, iodonium salts and sulfonium salts are particularly preferably used. Details of this method are described in Japanese Patent Application No. 2010-289360, the contents of which are incorporated herein by reference.

  Furthermore, as a third embodiment, there is a method using a discotic liquid crystal having polymerizable groups (for example, oxetanyl group and polymerizable ethylenically unsaturated group) having different polymerization properties. In this embodiment, after the discotic liquid crystal is brought into a predetermined alignment state, the pre-optically anisotropic layer is formed by performing light irradiation or the like under the condition that the polymerization reaction of only one polymerizable group proceeds. Next, mask exposure is performed under conditions that allow polymerization of the other polymerizable group (for example, in the presence of a polymerization initiator that initiates polymerization of the other polymerizable group. The alignment state of the exposed portion is completely fixed. One phase difference region having a predetermined Re is formed, and in the unexposed region, the reaction of one reactive group proceeds, but the other reactive group remains unreacted. Therefore, when heated to a temperature exceeding the isotropic phase temperature and allowing the reaction of the other reactive group to proceed, the unexposed region is fixed in the isotropic phase state, that is, Re becomes 0 nm.

<Surface layer>
The optically anisotropic element of the present invention may have a surface layer made of a cured film on the surface opposite to the first surface of the first film. There is no restriction | limiting in particular about the function of a surface layer. You may have a function as a hard-coat layer for protecting from the physical impact from the outside, and an antireflection layer for preventing reflection of external light. Moreover, these laminated bodies may be sufficient. When the optically anisotropic element of the present invention has a surface layer such as an antireflection layer, the first film also functions as a support for the surface layer.
An example is an example shown in FIG. 3, in which a hard coat layer and an antireflection layer are laminated. The surface layer may have a forward scattering layer, a primer layer, an antistatic layer, an undercoat layer, a protective layer, or the like together with or in place of the above layer. Details of each layer constituting the antireflection layer and the hard coat layer are described in [0182] to [0220] of JP-A-2007-254699, and preferable characteristics for the antireflection layer that can be used in the present invention. The same applies to preferable materials and the like.

<Polarizing film>
In the present invention, a general linear polarizing film can be used as the polarizing film. The polarizing film may be a stretched film or a layer formed by coating. Examples of the former include a film obtained by dyeing a stretched film of polyvinyl alcohol with iodine or a dichroic dye. Examples of the latter include a layer in which a composition containing a dichroic liquid crystalline dye is applied and fixed in a predetermined alignment state.
In the present specification, the term “polarizing film” means a linearly polarizing film.

<Liquid crystal cell>
The liquid crystal cell used in the stereoscopic image display device used in the stereoscopic image display system of the present invention is preferably VA mode, OCB mode, IPS mode, or TN mode, but is not limited thereto. Absent.
In a TN mode liquid crystal cell, rod-like liquid crystal molecules are substantially horizontally aligned when no voltage is applied, and are twisted and aligned at 60 to 120 °. The TN mode liquid crystal cell is most frequently used as a color TFT liquid crystal display device, and is described in many documents.
In a VA mode liquid crystal cell, rod-like liquid crystalline molecules are aligned substantially vertically when no voltage is applied. The VA mode liquid crystal cell includes (1) a narrowly defined VA mode liquid crystal cell in which rod-like liquid crystalline molecules are aligned substantially vertically when no voltage is applied, and substantially horizontally when a voltage is applied (Japanese Patent Laid-Open No. Hei 2-). 176625) (2) Liquid crystal cell (SID97, Digest of tech. Papers (Preliminary Proceed) 28 (1997) 845 in which the VA mode is converted into a multi-domain (MVA mode) for widening the viewing angle. ), (3) A liquid crystal cell in a mode (n-ASM mode) in which rod-like liquid crystalline molecules are substantially vertically aligned when no voltage is applied and twisted multi-domain alignment is applied when a voltage is applied (Preliminary collections 58-59 of the Japan Liquid Crystal Society) (1998)) and (4) SURVIVAL mode liquid crystal cells (announced at LCD International 98). Moreover, any of PVA (Patterned Vertical Alignment) type, optical alignment type (Optical Alignment), and PSA (Polymer-Sustained Alignment) may be used. Details of these modes are described in JP-A-2006-215326 and JP-T-2008-538819.
In an IPS mode liquid crystal cell, rod-like liquid crystal molecules are aligned substantially parallel to the substrate, and the liquid crystal molecules respond in a planar manner when an electric field parallel to the substrate surface is applied. In the IPS mode, black is displayed when no electric field is applied, and the transmission axes of the pair of upper and lower polarizing plates are orthogonal. JP-A-10-54982, JP-A-11-202323, and JP-A-9-292522 are methods for reducing leakage light at the time of black display in an oblique direction and improving a viewing angle using an optical compensation sheet. No. 11-133408, No. 11-305217, No. 10-307291, and the like.

<Polarizing plate for stereoscopic image display system>
In the stereoscopic image display system of the present invention, in order to make the viewer recognize a stereoscopic image called 3D video, the image is recognized through the polarizing plate. One aspect of the polarizing plate is polarized glasses. In the aspect in which the right-polarized and left-eye circularly polarized images are formed by the retardation plate, circularly polarized glasses are used, and in the aspect in which the linearly polarized images are formed, linear glasses are used. Right-eye image light emitted from one of the first and second retardation regions of the optically anisotropic layer is transmitted through the right glasses and shielded by the left glasses, and the first and second positions. It is preferable that the image light for the left eye emitted from the other of the phase difference regions is transmitted through the left glasses and shielded by the right glasses.
The polarizing glasses form polarizing glasses by including a retardation functional layer and a linear polarizer. In addition, you may use the other member which has a function equivalent to a linear polarizer.

  A specific configuration of the stereoscopic image display system of the present invention including the polarizing glasses will be described. First, the phase difference plate is formed on a plurality of first lines and a plurality of second lines that are alternately repeated on the video display panel (for example, on odd-numbered lines and even-numbered lines in the horizontal direction if the lines are in the horizontal direction). The first phase difference region and the second phase difference region having different polarization conversion functions are provided on the odd-numbered and even-numbered lines in the vertical direction if the line is in the vertical direction. When circularly polarized light is used for display, the phase difference between the first phase difference region and the second phase difference region is preferably λ / 4, and the first phase difference region and the first phase difference region are In the two phase difference region, it is more preferable that the slow axes are orthogonal.

When using circularly polarized light, the phase difference values of the first phase difference region and the second phase difference region are both set to λ / 4, the right eye image is displayed on the odd lines of the video display panel, and the odd line phase difference is displayed. If the slow axis of the region is in the 45 degree direction, it is preferable to arrange λ / 4 plates on both the right and left glasses of the polarized glasses, and the slow axis of the λ / 4 plate of the right glasses of the polarized glasses is Specifically, it may be fixed at approximately 45 degrees. In the above situation, similarly, the left eye image is displayed on the even line of the video display panel, and if the slow axis of the even line phase difference region is in the direction of 135 degrees, the left eyeglass of the polarizing glasses Specifically, the slow axis may be fixed at approximately 135 degrees.
Furthermore, from the viewpoint of emitting image light as circularly polarized light once in the patterning retardation film and returning the polarization state to the original state by the polarized glasses, the angle of the slow axis fixed by the right glasses in the above example is exactly The closer to 45 degrees in the horizontal direction, the better. Further, it is preferable that the angle of the slow axis fixed by the left spectacles is exactly close to horizontal 135 degrees (or -45 degrees).

For example, when the display panel is a liquid crystal display panel, the absorption axis direction of the front-side polarizing plate of the liquid crystal display panel is usually a horizontal direction, and the absorption axis of the linear polarizer of the polarizing glasses is the front-side polarizing plate. It is preferable that the direction is orthogonal to the absorption axis direction, and the absorption axis of the linear polarizer of the polarizing glasses is more preferably the vertical direction.
In addition, the absorption axis direction of the front-side polarizing plate of the liquid crystal display panel and the slow axis of the odd line retardation region and the even line retardation region of the patterning retardation film are 45 degrees on the efficiency of polarization conversion. It is preferable to make it.
In addition, about preferable arrangement | positioning of such polarized glasses, a patterning phase difference film, and a liquid crystal display device is disclosed by Unexamined-Japanese-Patent No. 2004-170693, for example.

  Examples of polarized glasses include those described in Japanese Patent Application Laid-Open No. 2004-170693, and examples of commercially available products include accessories of ZM-man and ZM-M220W.

  Hereinafter, the present invention will be described in more detail based on examples. The materials, amounts used, ratios, processing details, processing procedures, and the like shown in the following examples can be changed as appropriate without departing from the spirit of the present invention. Therefore, the scope of the present invention should not be construed as being limited by the following examples.

  Pattern photo alignment film prepared by mask exposure process, pattern rubbing alignment film prepared by mask rubbing process, or pattern alignment film formed by using ON-OFF of the interaction between the additive and the alignment film as described above Etc. were used in various ways to control the alignment of the liquid crystal composition and fix the alignment state, thereby forming patterned optical anisotropic layers on the support film, respectively, to produce FPRs. The liquid crystal composition was made of a polymerizable rod-like liquid crystal or a polymerizable discotic liquid crystal, and an additive for controlling alignment was added as required, and a polymerization initiator for advancing polymerization was also added. This patterned optically anisotropic layer was a pattern λ / 4 layer similar to the example shown in FIG. 6A, and the first and second retardation regions each showed λ / 4.

  A hard coat layer and an antireflection layer were sequentially formed on the surface of the first film by a conventional method to prepare surface layers.

  The second surface of the FPR produced above (the surface on which the patterned optically anisotropic layer of the support film is not formed) and the first surface of the surface layer produced above (hard coat layer and antireflection) The surface of the first film on the side where the layer is not formed) is bonded with an optically isotropic pressure-sensitive adhesive (SK-2057 manufactured by Soken Chemical Co., Ltd.), and the optical structure described in the following table is used. Anisotropic elements were produced respectively.

(Crosstalk evaluation)
The produced optically anisotropic elements of Examples 1 to 3 and Comparative Examples 1 and 2 were laminated, and the peripheral portion of the first film of the surface layer and the display panel were bonded to each other as shown in FIG. In the VA mode liquid crystal display device pasted by SK-2057 manufactured by Soken Chemical Co., Ltd., the image for the right eye of the patterning retardation layer is transmitted on the odd lines (horizontal direction) of the liquid crystal display panel as shown in FIG. It arrange | positions so that it may become the area | region (1st phase difference area | region) to perform, and it has arrange | positioned so that it may become the area | region (2nd phase difference area | region) which permeate | transmits the image for left eyes of a patterning phase difference layer on an even-numbered line. This liquid crystal display device was placed in a high temperature and high humidity environment (temperature 60 ° C./humidity 90%) for one day. On this screen, “display 0” for displaying all lines white, “display 1” for displaying odd lines black, even lines for white display, “white display for odd lines, and black display for even lines” Three patterns of “display 2” were displayed, and the intensity of the transmitted light that passed through the left and right glasses was measured from the front, a 45 ° oblique direction from the front, and a polar angle of 5 °. At this time, the amount of crosstalk at each location can be obtained as an average value of crosstalk (right eye) and crosstalk (left eye) obtained by calculating the following equations (1) and (2).
Formula (1):
Crosstalk (right eye) = (right glasses transmitted light on display 2) / (right glasses transmitted light on display 0) × 100%
Formula (2):
Crosstalk (left eye) = (left glasses transmitted light at display 1) / (left glasses transmitted light at display 0) × 100%

  From Table 2, it can be seen that crosstalk is reduced when the area of the second surface of the support film is smaller than the area of the first surface of the first film. On the other hand, it can be seen that in Comparative Example 1 in which there is no first film and in Comparative Example 2 in which the area of the first surface and the area of the second surface are equal, crosstalk is inferior to that of the Example.

DESCRIPTION OF SYMBOLS 10 Pattern optically anisotropic layer 12 Support film 13 Adhesive layer, adhesive layer 14 1st film 15 Surface layer 15a Hard coat layer 15b Antireflection layer 16 Polarizing film a In-plane slow axis b In-plane slow axis 1a 1st phase difference area 1b 2nd phase difference area

Claims (16)

The first retardation region and the second retardation region, which are supported by the first film, the second film, and the second film, wherein at least one of the in-plane slow axis direction and the in-plane retardation is different from each other. A laminated film having a patterned optically anisotropic layer in which the first and second retardation regions are alternately arranged in a plane,
A pattern optical anisotropic element including at least
The laminated film is disposed on the surface of the first film (hereinafter referred to as the first surface),
An optical anisotropy characterized in that an area S2 of the first film side surface (hereinafter referred to as a second surface) of the laminated film is smaller than an area S1 of the first surface of the first film. element. The first surface of the first film has a central portion where the laminated film is disposed and a peripheral portion surrounding the central portion where the laminated film is not disposed. Optical anisotropic element. The optically anisotropic element according to claim 1, wherein the first film and the second film are arranged with their in-plane slow axes orthogonal to each other. The optically anisotropic element according to any one of claims 1 to 3, wherein in-plane retardation Re (550) of a wavelength of 550 nm of each of the first film and the second film is 20 nm or less. Either one of the first film and the second film has an in-plane slow axis parallel to the MD direction, and the other has an in-plane slow axis parallel to the TD direction. The optically anisotropic element according to claim 1. The optically anisotropic element according to claim 1, further comprising an antireflection layer on a surface opposite to the first surface of the first film. The optically anisotropic element according to claim 1, wherein the second film is disposed on the surface of the first film via the pressure-sensitive adhesive layer. The optically anisotropic element according to claim 1, wherein the second film is disposed on the surface of the first film via the adhesive layer. The area ratio S1 / S2 between the area S2 of the second surface of the second film and the area S1 of the first surface of the laminated film is 1.01 to 1.30. The optically anisotropic element according to any one of the above. The polarizing plate which has a polarizing film and the optically anisotropic element of any one of Claims 1-9 at least. A display panel driven based on an image signal;
An image display device having at least an optically anisotropic element disposed on the viewing side of the display panel,
From the viewing side, the optical anisotropic element is
The first retardation region and the second retardation region, which are supported by the first film, the second film, and the second film, wherein at least one of the in-plane slow axis direction and the in-plane retardation is different from each other. A laminated film having a patterned optically anisotropic layer in which the first and second retardation regions are alternately arranged in a plane,
An optically anisotropic element including at least
The laminated film is disposed on the surface of the first film (hereinafter referred to as the first surface),
On the first surface of the first film, there is a central portion where the laminated film is disposed, and a peripheral portion surrounding the central portion where the laminated film is not disposed,
The image display apparatus by which the peripheral part of the said 1st film is bonded by the said display panel. The image display apparatus according to claim 11, wherein a peripheral edge portion of the first film is bonded to the display panel via an adhesive layer. The image display device according to claim 11, wherein a peripheral edge portion of the first film is bonded to the display panel via an adhesive layer. The image display device according to claim 11, further comprising a polarizing film between the optically anisotropic element and the display panel. The image display device according to claim 11, wherein the display panel includes a liquid crystal cell. A stereoscopic image display system comprising at least the image display device according to any one of claims 11 to 15 and a polarizing plate disposed on a viewing side of the image display device, wherein a stereoscopic image is visually recognized through the polarizing plate.

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