JP2017181994A - Polarizing body for liquid crystal device and method for manufacturing the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a polarizing body for a liquid crystal device and a method for manufacturing the same, which can make it easier to grasp the arrangement of a polarizing plate when attaching a polarizing body to a surface of a liquid crystal cell simply and accurately by visual observation only, without requiring cutting of the polarizing plate according to an optical axis.SOLUTION: The polarizing body for a liquid crystal device according to the present invention includes: at least one polarizing plate having an optical axis exhibiting an optical anisotropy; a protective film covering one surface of the polarizing plate; an adhesive layer covering the other surface of the polarizing plate; and a release film covering the adhesive layer, where either of the protective film or the separation film has an area larger than the area of the polarizing plate, and the either of the protective film or the separation film which has an area larger than the area of the polarizing plate is provided with processing on the outer surface of the polarizing plate, the processing showing the arrangement of the polarizing plate when attaching the polarizing body to a surface of the liquid crystal cell.SELECTED DRAWING: Figure 7

Description

  The present invention relates to a polarizer for a liquid crystal device to be attached to at least one surface of a liquid crystal cell composed of a pair of substrates with a liquid crystal layer sandwiched therebetween, and a method for manufacturing the same.

A liquid crystal device is generally made of a pair of glass made of a liquid crystal, an alignment film, a transparent electrode, and the like sandwiching a liquid crystal layer as a liquid crystal device 31 as shown in a schematic cross-sectional view as an example of the configuration shown in FIG. On the surface of a liquid crystal cell 32 made of a transparent substrate, a CF side (color filter) polarizing plate 1 and a TFT side (thin film transistor) polarizing plate 2 attached via an adhesive layer 3 are provided.
When the polarizing plates 1 and 2 are attached to the surface of the liquid crystal cell, the optical axis (liquid crystal molecular axis) direction of the liquid crystal cell 32 and the optical axis (transmission axis or absorption axis) direction of each polarizing plate 1 and 2 Needs to be pasted in accordance with a predetermined optical design condition position. Specifically, in the case of FIG. 1, the liquid crystal cell 32 is in a state where the liquid crystal molecules are twisted by 90 ° between two alignment films having different alignment directions, and the CF side polarizing plate 1 and the TFT side polarizing plate 2 are The liquid crystal cells 32 are attached in the same direction as the liquid crystal molecular axes of the liquid crystal cells 32 in the vicinity, and the polarizing plate transmission axes are shifted from each other by 90 degrees.
Here, when the optical axis of each polarizing plate is attached in a state deviated from the optical design conditions, desired optical characteristics cannot be obtained, and display quality may be deteriorated.

  Therefore, in Patent Document 1, the polarizing plate is cut in outer shape in accordance with the optical axis direction, and the outer shape (vertical angle and side) of the polarizing plate and the alignment mark provided on the substrate are used as a reference. A technique for bonding a polarizing plate is disclosed.

Further, in Patent Document 2 or Patent Document 3, the optical axis of the liquid crystal cell and the optical axis of the polarizing plate are detected based on the master polarizer (or master polarizing plate) whose optical axis angle is known, and based on this. A technique for applying a liquid crystal cell and a polarizing plate in accordance with the optical design condition position is disclosed.
As a specific method for aligning with these optical design conditions, the light intensity is minimized or maximized by irradiating the master polarizer, the liquid crystal cell, and the polarizing plate with light and measuring the intensity of the transmitted light. This is done by adjusting the relative positions of the liquid crystal cell and the polarizing plate.

  Here, the polarizing plate is an external component, and is usually covered with a protective film so that the surface thereof is not damaged or soiled during the manufacturing process of the liquid crystal device. Moreover, since it has the adhesion layer for sticking a polarizing plate to a liquid crystal cell, it also has the release film which protects this adhesion layer, but in patent document 4, one side of a polarizing plate (base film) A protective film on the surface, an adhesive layer on the other surface, and a release film that covers the adhesive layer. The protective film and at least one of the release films are planar with the liquid crystal layer. By selectively providing an opening as a portion that is optically isotropic with the polarizing plate at a specific portion of the overlapping planar region and irradiating light so as to pass through the opening, the liquid crystal cell and the polarizing plate A technique is disclosed in which the relative position can be accurately adjusted.

JP 2000-221461 A Japanese Patent Laid-Open No. 8-201801 JP 2003-107452 A JP 2010-96948 A

However, the above technique has the following problems. First, in Patent Document 1, there is a problem that the shape of the polarizing plate is limited because the outer shape of the polarizing plate itself must be cut in accordance with the optical axis of the polarizing plate.
Moreover, although the protective film and release film used for a polarizing plate by patent documents 1-3 are finally removed in the manufacture process of a liquid crystal device, generally plastic resin material is used for pressure molding, Since it is formed into a film using a method such as extrusion, it is not necessarily optically isotropic, and it may have optical anisotropy in which the molecular direction of the material is aligned in a specific direction.
Therefore, when attaching the polarizing plate to the surface of the liquid crystal cell, using the optical design condition alignment method by light irradiation, the relative position between the liquid crystal cell and the polarizing plate that the light intensity is minimum or maximum, There was a problem that it was difficult to specify with high accuracy.
Further, in Patent Document 4, at least one of the protective film and the release film is selectively provided with an opening at a specific portion of a planar region that overlaps the liquid crystal layer, whereby each film itself has an optical property. Although it is possible to adjust the position without being affected by the directivity, it is necessary to provide an opening at a position of the protective film or release film that is partially on the polarizing plate. Since the polarizing plate at the opening is exposed, the protection of the polarizing plate is not perfect, and in Patent Documents 2 to 4, it is necessary to adjust the optical design condition position between the liquid crystal cell and the polarizing plate by light irradiation. For this reason, there is a problem that a process for that purpose is necessary and the cost is high.
Therefore, the object of the present invention is to apply a polarizing plate to the surface of a liquid crystal cell simply and accurately by visual observation without requiring an outer shape cut in accordance with the optical axis direction of the polarizing plate. An object of the present invention is to provide a polarizer for a liquid crystal device and a method for producing the same, which can facilitate the grasping of the polarizing plate arrangement.

  The inventors of the present invention have intensively studied to solve the above-described problems. As a result, at least one polarizing plate having an optical axis exhibiting optical anisotropy and one surface of the polarizing plate are provided on the polarizer for a liquid crystal device. When the protective film to cover, the adhesive layer provided so that the other surface of this polarizing plate may be covered, and the release film which covers this adhesive layer are provided, either one of this protective film or this release film The polarizing plate body can be visually confirmed on the outer surface of the polarizing plate shape of the protective film or release film having an area larger than that of the polarizing plate, and the surface of the liquid crystal cell. If processing that shows the arrangement of the polarizers at the time of pasting is performed, the polarizer can be easily and accurately visually only required without the need to cut the outer shape in accordance with the optical axis direction of the polarizing plate. Of polarizing plate when affixing to the liquid crystal cell surface Grip found that it is possible to facilitate, as an application example described below, thereby completing the present invention.

[Application Example 1]
The polarizer for a liquid crystal device according to this application example is a polarizer for a liquid crystal device attached to at least one surface of a liquid crystal cell including a pair of substrates with a liquid crystal layer sandwiched between the polarizers. At least one polarizing plate having an optical axis exhibiting properties, a protective film covering one surface of the polarizing plate, an adhesive layer provided to cover the other surface of the polarizing plate, and the adhesive layer A protective film or a release film, and any one of the protective film or the release film has a larger area than the polarizing plate and has a larger area than the polarizing plate. The mold film is characterized in that a processing showing the polarizing plate arrangement when the polarizing body is attached to the surface of the liquid crystal cell is added to the polarizing plate outer surface.
According to this configuration, at least one surface of a liquid crystal cell composed of a pair of substrates with a liquid crystal layer sandwiched between the polarizing plate-shaped outer surface, which is a larger area than the polarizing plate protective film or the release film polarizing plate Since the processing to show the arrangement of the polarizing plate when the polarizer is attached to the film is added without affecting the polarizing plate itself, the polarizing plate can be visually checked without the need to cut the outer shape in accordance with the optical axis direction. Thus, it is possible to easily and accurately grasp the polarizing plate arrangement when the polarizer is attached to the surface of the liquid crystal cell.

[Application Example 2]
In the polarizer for a liquid crystal device according to the application example, the processing is shape processing.
According to this configuration, since the processing in the polarizer is based on the shape processing, the polarization when the polarizer is attached to the surface of the liquid crystal cell with good visibility, only visually, simply and accurately. It is possible to easily grasp the board arrangement.

[Application Example 3]
In the polarizer for a liquid crystal device according to the application example described above, one side of a protective film or a release film having an area larger than that of the polarizing plate has a shape parallel to the optical axis direction of the polarizing plate.
According to this configuration, since one side of the protective film or the release film in the polarizer has a shape parallel to the optical axis direction of the polarizing plate, the optical axis direction of the polarizing plate can be grasped only by visual observation, The polarizing plate arrangement can be easily grasped when the polarizer is attached to the surface of the liquid crystal cell.

[Application Example 4]
In the polarizer for a liquid crystal device according to the application example described above, at least one side of the polarizing plate and one side of the substrate are parallel to each other.
According to this configuration, since one side of the polarizing plate in the polarizer and one side of the substrate of the liquid crystal cell are parallel to each other, each side is at least of a liquid crystal cell composed of a pair of substrates sandwiching the liquid crystal layer. It can be used as a reference side when a polarizer is attached to one surface, and the polarizing plate arrangement can be easily grasped.

[Application Example 5]
In the polarizer for a liquid crystal device according to the application example described above, the polarizing plate has a regular polygonal shape.
According to this configuration, since the polarizing plate in the polarizer has a regular polygonal shape, it serves as a reference side when the polarizer is attached to at least one surface of a liquid crystal cell composed of a pair of substrates sandwiched between liquid crystal layers. This makes it easy to grasp the polarizing plate arrangement.

[Application Example 6]
In the polarizing plate for a liquid crystal device according to the application example, the polarizing plate has a circular shape.
According to this configuration, while the polarizing plate in the polarizing body is circular, it is easy to grasp the polarizing plate arrangement when attaching the polarizing body to the liquid crystal cell surface simply and accurately by visual observation. can do.

[Application Example 7]
The method for manufacturing a polarizer for a liquid crystal device according to this application example is a method for manufacturing a polarizer for a liquid crystal device to be attached to at least one surface of a liquid crystal cell including a pair of substrates with a liquid crystal layer sandwiched therebetween. The body includes at least one polarizing plate having an optical axis exhibiting optical anisotropy, a protective film covering one surface of the polarizing plate, and an adhesive layer provided so as to cover the other surface of the polarizing plate. And a release film covering the adhesive layer, and a polarizing plate having a predetermined shape is formed from the polarizing plate, and any one of the protective film and the release film of the polarizing plate is a polarizing plate. In order to show the arrangement of the polarizing plate when the polarizer is attached to the surface of the liquid crystal cell, on the outer surface of the polarizing plate of the protective film or the release film having a larger area, Processed and polarized light of a predetermined shape And a step of forming a body.
According to this method, the polarized light when the polarizer is attached to the surface of the liquid crystal cell with respect to the portion that becomes the polarizer-shaped outer surface of the protective film or release film of the polarizer original plate, which has a larger area than the polarizer. Since the processing is performed so as to show the plate arrangement, it is possible to process the polarizing plate without affecting the polarizing plate, and it is possible to manufacture a polarizer that has been subjected to the desired processing with a high yield.

  The polarizer for a liquid crystal device according to the present invention includes at least one polarizing plate having an optical axis exhibiting optical anisotropy, a protective film covering one surface of the polarizing plate, An adhesive layer provided so as to cover the other surface; and a release film covering the adhesive layer, wherein either one of the protective film or the release film has a larger area than the polarizing plate. The protective film or release film having a larger area than the polarizing plate has a polarizing plate-shaped outer surface, and the polarizing plate is disposed on the surface of the liquid crystal cell. Therefore, at least one of the liquid crystal cells composed of a pair of substrates in which a liquid crystal layer is sandwiched between the polarizing plate-shaped outer surface which is a larger area than the polarizing plate protective film or the release film polarizing plate. A polarizer is attached to the surface Since the processing to show the arrangement of the polarizing plate at the time is added without affecting the polarizing plate itself, the polarizing plate can be simply visually observed without the need to cut the outer shape in accordance with the optical axis direction. And it is useful that can make it easy to accurately grasp the arrangement of the polarizing plate when the polarizer is attached to the surface of the liquid crystal cell.

It is a cross-sectional schematic diagram which shows an example of a structure of a liquid crystal device. It is a perspective view which shows an example of the polarizing body laminated structure for liquid crystal devices which concerns on this invention. It is a schematic diagram which shows the polarizing plate original plate formation process of the manufacturing method of the polarizing plate for liquid crystal devices which concerns on this invention. It is a schematic diagram which shows the 1st process of the polarizing body formation process of the manufacturing method of the polarizing plate for liquid crystal devices which concerns on this invention. It is a plane schematic diagram which shows an example of the 1st process and 2nd shape process of the protective film or release film of the polarizing plate for liquid crystal devices which concerns on this invention. It is a plane schematic diagram which shows an example of the 2nd marking process of the protective film or release film of the polarizing plate for liquid crystal devices which concerns on this invention. It is a schematic diagram which shows the manufacturing method of the polarizing plate for liquid crystal devices which concerns on Example 1 of this invention. It is a schematic diagram which shows the manufacturing method of the polarizing plate for liquid crystal devices which concerns on Example 3 of this invention. It is a schematic diagram which shows the manufacturing method of the polarizing plate for liquid crystal devices which concerns on Example 7 of this invention. It is a schematic diagram which shows the manufacturing method of the polarizing plate for liquid crystal devices which concerns on Example 8 of this invention.

DESCRIPTION OF EMBODIMENTS Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. However, the present invention is not construed as being limited based on specific examples described in the specification.
The drawings to be used are appropriately enlarged or reduced in size so that the part to be described can be recognized.

  In the present embodiment, a polarizer for a liquid crystal device attached to at least one surface of a liquid crystal cell composed of a pair of substrates with a liquid crystal layer sandwiched therebetween and a method for manufacturing the same will be described.

<Polarizer>
First, a polarizer for a liquid crystal device will be described with reference to FIG. FIG. 2 is a perspective view showing an example of a polarizer laminated structure for a liquid crystal device according to the present invention. In the present invention, any one of the protective film and the release film has an area larger than that of the polarizing plate, but here, only the laminated structure is shown, and the size of the area is not shown.

As shown in FIG. 2, the polarizer 20 for a liquid crystal device includes a plurality of optical functional films laminated. For example, a polarizing plate 10 having an optical axis exhibiting optical anisotropy is provided on one surface of the polarizing plate. And a release film 5 that covers the pressure-sensitive adhesive layer, and a protective film 4 that covers the pressure-sensitive adhesive layer, a pressure-sensitive adhesive layer 3 that covers the other surface of the polarizing plate, and the like.
Furthermore, the polarizing plate 10 includes a polarizing film 6 that is a polarizer and a support film 7 that supports the polarizing film 6 from both sides.

Various polarizing films can be used as long as they have a function of selectively transmitting linearly polarized light in one direction from natural light, that is, non-polarized light. For example, the polarizing film is uniaxially or biaxially stretched. Examples thereof include an iodine polarizing film in which iodine is adsorbed and oriented on the polyvinyl alcohol film, and a dye polarizing film in which dichroic dye is adsorbed and oriented on the polyvinyl alcohol film.
These iodine-based polarizing films, dye-based polarizing films, etc. have the function of selectively transmitting one direction of linearly polarized light from natural light and absorbing the other direction of linearly polarized light, and are called absorption polarizing plates. It is.
The iodine-based polarizing film and the dye-based polarizing film are usually on one side or both sides, and the polarizing film alone prevents the polarizing function from being affected by moisture, oxygen, etc. Support film having high transparency and durability, such as cellulose acetate resin film such as triacetyl cellulose and diacetyl cellulose, acrylic resin film, polyester resin film, polyarylate resin film, polyethersulfone resin film, A cyclic polyolefin resin film using a cyclic olefin such as norbornene as a monomer is provided as a support film to form a polarizing plate. Moreover, as a method of providing the support film on the polarizing film, for example, an adhesive made of an aqueous solution of a polyvinyl alcohol resin can be used.
In the present invention, the support film may be on one side or both sides of the polarizing film. However, in this embodiment, in order to protect the surface of the polarizing film, the support film is provided on both sides of the polarizing film. Used as a polarizing plate.
The polarizing plate used in the present invention is not limited to the absorptive polarizing plate described above, but is also a reflective polarized light having a function of selectively transmitting one direction of linearly polarized light from natural light and reflecting or scattering the other direction of linearly polarized light. A plate or a so-called scattering type polarizing plate may be used.
That is, the polarizing plate that can be used in the present invention is not necessarily limited by the polarizing plate, and any polarizing plate that has a function of selectively transmitting linearly polarized light in one direction from natural light may be used.

  The protective film is provided to prevent the polarizing plate from being damaged or contaminated, and is processed by a method such as pressure molding or extrusion molding of a resin material, and a film having a predetermined thickness. Therefore, a uniaxially or biaxially stretched one can be used. Among them, a polyester film is preferably used as the self-adhesive type. However, when the surface of the polarizing plate is subjected to an anti-glare treatment for preventing surface reflection, etc., PET (polyethylene treated with an adhesive treatment) is used. Terephthalate) film may be used, and in this case, a known technique such as coextrusion may be employed.

The pressure-sensitive adhesive layer is preferably an acrylic pressure-sensitive adhesive material, assuming that the polarizing plate is attached to the surface of a substrate such as glass, but generally does not affect the optical properties of the polarizing plate. Anything may be used as long as it is called an adhesive.
Specifically, (meth) acrylate, oxetane, styrene butadiene rubber, butyl rubber, natural rubber, silicone rubber, polyisoprene, polybutene, polyvinyl ether, acrylic resin, Examples thereof include polyester.
In addition, the application | coating means of an adhesive is not specifically limited, A well-known coating technique including a roll coating method or a gravure coating method can be employ | adopted, or an adhesive layer is a separator from which peeling force mutually differs. It can also be formed by pasting a non-carrier type adhesive layer sandwiched between them to a polarizing plate.

The release film protects the adhesive layer and is removed before the polarizing plate is attached to an adherend such as a substrate, but the resin material is formed by a method such as pressure molding or extrusion molding. In order to obtain a film having a predetermined thickness that is processed by carrying out the process, a uniaxially or biaxially stretched film can be used. Among these, a PET film is suitably used as the type that has been subjected to the release treatment.
Moreover, when using the said non-carrier type adhesion layer, it can also be applied as one of the separators.

In the polarizer for a liquid crystal device used in the present invention, another optical functional layer can be provided on the polarizing plate surface. Examples of other optical functional layers include a retardation film, an anisotropic light diffusion film, a brightness enhancement film, and the like.
Furthermore, in order to impart functionality to the pressure-sensitive adhesive layer, it is possible to make adjustments such as adding fine particles to form a diffusible pressure-sensitive adhesive layer or a color-corrected pressure-sensitive adhesive layer to which a dye for color correction is added.
Regarding the installation of these other optical functional layers and the functionalization of the adhesive layer, a plurality of functionalities can be imparted at the same time, and known techniques can be used in combination.

  The polarizer for a liquid crystal device according to the present invention includes at least one polarizing plate having an optical axis exhibiting optical anisotropy, a protective film covering one surface of the polarizing plate, and the other surface of the polarizing plate. An adhesive layer provided so as to cover the adhesive layer, and a release film covering the adhesive layer, and any one of the protective film or the release film has an area larger than that of the polarizing plate. The protective film or release film having an area larger than that of the polarizing plate is added to the outer surface of the polarizing plate by a process showing the arrangement of the polarizing plate when the polarizer is attached to the liquid crystal cell surface. However, the processing showing the arrangement of the polarizing plates will be described in detail in the following description of the manufacturing method with the description of the steps.

<Manufacturing method>
Then, the manufacturing method of the polarizing plate for liquid crystal devices is demonstrated using FIGS. By sequentially performing the following steps, the process of showing the polarizing plate arrangement when the polarizer is attached to the surface of the liquid crystal cell on the polarizing plate-shaped outer surface of the protective film or release film having a larger area than the polarizing plate An added polarizer for a liquid crystal device can be obtained.
(1) Polarizer original plate forming step of forming a polarizer original plate of a predetermined shape from a polarizing original plate (2) Either one of the protective film or release film of the polarizer original plate has a larger area than the polarizing plate And, on the outer surface of the polarizing plate shape of the protective film or release film having a large area, the polarizing body is processed so as to show the arrangement of the polarizing plate when affixed to the surface of the liquid crystal cell. Polarizer forming process for forming a polarizer

(Polarizer plate forming process)
FIG. 3 is a schematic diagram showing a process of forming a polarizer original plate having a predetermined shape from a polarization original plate having an optical axis. The dotted double arrow indicates the optical axis direction of the polarizing plate.
Specifically, a polarizing plate original plate 41 having a predetermined shape is produced by cutting a long strip-shaped polarizing original plate wound in a roll shape into a desired shape using an apparatus.
As a cutting method, a known technique such as a Thomson-type hydraulic punching machine, a continuous automatic cutting machine (super cutter), or a laser processing machine can be employed.

The laser beam irradiated in the laser processing machine used for cutting is not particularly limited, and an infrared laser, a semiconductor laser, a carbon dioxide gas laser, a fiber laser, a femtosecond laser, a YAG laser, or the like can be used.
The irradiation condition of the laser beam is not particularly limited because the output, the scanning speed of the laser beam, and the like are adjusted according to the material and configuration of the polarizing plate as the workpiece. That is, the energy input per unit length is obtained by dividing the laser power (W) by the scanning speed (mm / s). In order to perform a desired cutting process, the laser power or the scanning speed is By changing either one, the amount of energy input per unit length can be adjusted.

(Polarizer formation process)
Any one of the protective film or release film of the polarizer original plate has an area larger than that of the polarizing plate, and the polarizing body is applied to the polarizing plate-shaped outer surface of the protective film or release film having the large area. This is a process of forming a polarizer having a predetermined shape by processing so as to show the arrangement of polarizing plates when affixed to the surface of the liquid crystal cell. First, according to the schematic diagram of FIG. The first process, which is one of the shape processes that make the polarizing plate in the original plate a predetermined shape, will be described. 4, the left side (a) corresponds to (a), and the right side (b) corresponds to (a), and is a plan view viewed from the front surface of each perspective view of (a).
The lowermost layer is the protective film 4 or the release film 5, and the upper layer configuration excluding the protective film 4 or the release film 5 varies depending on which one has a larger area than the polarizing plate. Hereinafter) will be collectively referred to as a half-cut layer (50 in the figure). Moreover, the dotted double-pointed arrow in (b) the plan view indicates the optical axis direction of the polarizing plate.
Specifically, the protective film 4 or the release film 5 is half-cut by an apparatus so as to have a larger area than the polarizing plate in order to make the polarizing plate in the polarizer plate into a desired polarizing plate shape. Thereby, the process which shows arrangement | positioning of a polarizing plate will be made to this large area location, without affecting the polarizing plate location to require.
As the half-cutting method, known techniques such as a Thomson-type hydraulic punching machine, a continuous automatic cutting machine (super cutter), a laser processing machine, etc. can be adopted. It is preferable to use the equipment used.
Further, as shown in FIG. 4 (a), the shape of the protective film 4 or the release film 5 so as to have a larger area than the polarizing plate is not particularly limited, and the polarizer is attached to the surface of the liquid crystal cell. In order to make it easier to grasp the arrangement of the polarizing plate when pasting, the polarizing film-shaped outer surface of the protective film 4 or the release film 5 is in contact with only one side of the polarizing plate (61), Also included are those that are partially in contact with one side (62).
Furthermore, the shape of the outer surface of the polarizing plate is not particularly limited, but in addition to a rectangle as shown in FIG. 4, a parallelogram shape is preferable.

The laser beam irradiated in the laser processing machine used for half-cutting is not particularly limited as long as it is a laser beam that is subjected to half-cut processing, such as an infrared laser, a semiconductor laser, a carbon dioxide laser, a fiber laser, A femtosecond laser, a YAG laser, or the like can be used.
The irradiation condition of the laser beam is not particularly limited because the output, the scanning speed of the laser beam, and the like are adjusted according to the material and configuration of the polarizer original plate that is the workpiece. That is, the energy input per unit length is obtained by dividing the laser power (W) by the scanning speed (mm / s). To perform a desired half-cut process, the laser power or the scanning speed is used. By changing any of the above, the amount of energy input per unit length can be adjusted.

When the polarizing plate in the polarizer original plate is made into a predetermined shape by the first processing, the details will be described later with a specific example. However, the optical axis direction of the polarizing plate and the protective film or release film If it is cut in advance at the stage of the polarizer original plate forming step so that the specific side is parallel, it may be possible to obtain a polarizer having a predetermined shape when the first processing is completed.
In cases other than the above, the second processing showing the arrangement of the polarizing plate when the polarizing body is attached to the surface of the liquid crystal cell is continuously applied to the outer surface of the polarizing plate of the protective film or release film of the polarizing plate. It can be set as a shaped polarizer.
The second processing can be classified mainly into second shape processing and second marking processing performed on the protective film or the release film. Both processes may be performed independently or in combination, but in the present invention, only the second shape process is a half-cut with a predetermined shape of the polarizing plate in the polarizer plate, which is the previous process ( This is preferable because the equipment at the time of the first processing can be used continuously.

The 2nd shape processing method in this invention will not be specifically limited if it is a method of performing the shape processing which shows polarizing plate arrangement | positioning.
That is, it means that shape processing such as cutting and concavity and convexity is performed on the outer surface of the polarizing plate shape of the protective film or release film having a larger area than the polarizing plate.
The second shape processing method is a Thomson-type hydraulic punching machine, continuous automatic cutting machine (super cutter), laser processing machine cutting on the polarizing plate-shaped outer surface of the protective film of the polarizer plate or the release film, This can be done by adopting known techniques such as slitting with a slitting machine, embossing with an embossing machine, etc., but a polarizing plate original plate forming step as a pre-process and a polarizing plate in a polarizing plate original plate as a first process are predetermined. It is preferable to use the equipment used in the half-cut shape.

Here, an example of a concrete 1st process and a 2nd shape process is shown in FIG. FIG. 5 is a schematic plan view showing an example of the first processing and the second shape processing of the protective film 4 or the release film 5 of the polarizer 20 for the liquid crystal device according to the present invention, and is based on the same viewpoint as FIG. It is a top view. Further, the dotted double arrow indicates the optical axis direction of the polarizing plate.
(A) shows an example of the first processing, in which the shape of the protective film 4 or the release film 5 is a parallelogram, and the optical axis direction of the polarizing plate is the same as the direction of the oblique side of the long side of the parallelogram. Therefore, since the optical axis direction of the polarizing plate can be easily grasped only by visual observation, the polarizer can be simply and accurately attached to the surface of the liquid crystal cell. Further, in the case of this processing, since the polarizing body can be obtained up to the first processing of the polarizing body forming step, the second processing is not required, and the polarizing body for a liquid crystal device can be manufactured with a high yield.
(B) shows an example of the second shape processing, in which the protective film 4 or the release film 5 is cut in the same direction as the optical axis direction of the polarizing plate. Thereby, since the optical axis direction of a polarizing plate can be easily grasped | ascertained only by visual observation, a polarizing body can be affixed on the liquid crystal cell surface simply and correctly.
(C) shows an example of the second shape processing, and since the optical axis direction of the polarizing plate and at least one side of the protective film 4 or the release film 5 are parallel before the shape processing, in this case, the protective film 4 or the release film 5 is cut at two vertices. If one side of the protective film 4 or the release film 5 whose apex is not cut is the optical axis direction of the polarizing plate, the optical axis direction of the polarizing plate can be easily grasped only by visual observation. In addition, the polarizer can be adhered to the surface of the liquid crystal cell accurately.
(D) shows an example of a 2nd shape process, and unlike (a)-(c), the rectangular-shaped type | mold which does not show the optical axis direction of a polarizing plate in one place of the protective film 4 or the release film 5 Punching is performed, and 70 is a cavity. In this case, the optical axis direction of the polarizing plate is not known from the polarizer, but the one-axis processing can be used as a mark when the polarizer is attached to the liquid crystal cell surface, so the optical axis direction is grasped. Even if it does not, a polarizing body can be affixed on the liquid crystal cell surface simply and correctly only by visual observation.
The rectangular die-cutting process that does not indicate the optical axis direction of the polarizing plate is an example of the present invention. In the present invention, the die-cutting shape is not limited to any shape. However, there is no particular limitation as long as the polarizing body can be used as a mark when affixed to the surface of the liquid crystal cell.
In the above processes, the shape of the half-cut layer 50 including the polarizing plate is not particularly limited, but a polygonal shape is preferable in addition to a circle, a rectangle, a square, and the like as shown in FIG. In particular, a shape having a side is more suitable because it is easy to grasp the arrangement when the liquid crystal cell surface is attached.

The second mark processing method in the present invention is not particularly limited as long as it is a method for performing mark processing indicating the arrangement of polarizing plates.
That is, it means that processing for adding a mark is performed on the outer surface of the polarizing plate shape of the protective film or release film having a larger area than the polarizing plate.
The second marking processing method is a publicly known method such as drawing with a writing instrument or painting material, printing with a printing tool, sticking with a sticker, label, or decal on the polarizing plate outer surface of the protective film of the polarizer plate or the release film. This can be done by adopting the technology.

A specific example of the second marking process is shown in FIG. FIG. 6 is a schematic plan view showing an example of the second mark processing of the protective film 4 or the release film 5 of the polarizer 20 for a liquid crystal device according to the present invention, and is a plan view from the same viewpoint as FIG. . Further, the dotted double arrow indicates the optical axis direction of the polarizing plate.
In the case of (a), the protective film 4 or the release film 5 is stamped in the same direction as the optical axis direction of the polarizing plate. Thereby, since the optical axis direction of a polarizing plate can be easily grasped | ascertained only by visual observation, a polarizing body can be affixed on the liquid crystal cell surface simply and correctly.
In the case of (b), the optical axis direction of the polarizing plate and at least one side of the protective film 4 or the release film 5 are parallel to each other before the second marking process. Marking is performed at two locations near the apex of the film 5. If one side of the protective film 4 or the release film 5 with two apexes that are not stamped is the optical axis direction of the polarizing plate, the optical axis direction of the polarizing plate can be easily grasped only by visual observation. The polarizer can be attached to the surface of the liquid crystal cell simply and accurately.
In the case of (c), unlike (a) and (b), the protective film 4 or the release film 5 is subjected to a rectangular marking process that does not indicate the optical axis direction of the polarizing plate, 71 Is a mark. In this case, the optical axis direction of the polarizing plate is not known from the polarizer, but the one-axis processing can be used as a mark when the polarizer is attached to the liquid crystal cell surface, so the optical axis direction is grasped. Even if it does not, a polarizing body can be affixed on the liquid crystal cell surface simply and correctly only by visual observation.
The mark (c) that does not indicate the optical axis direction of the polarizing plate is an example of the present invention. In the present invention, the mark may have any shape including letters and symbols. However, there is no particular limitation as long as the polarizing body can be used as a mark when affixed to the surface of the liquid crystal cell.
At the time of each marking process, the shape of the half-cut layer 50 including the polarizing plate is not particularly limited, but a polygonal shape is preferable in addition to a circle, a rectangle, a square, and the like as shown in FIG. In particular, a shape having a side is more suitable because it is easy to grasp the arrangement when the liquid crystal cell surface is attached.

  The polarizer for a liquid crystal device according to the present embodiment has been made in consideration of the polarizer and the manufacturing method. Hereinafter, the polarizer for a liquid crystal device and the manufacturing method thereof will be described with reference to examples.

Example 1
As shown in FIG. 7 (a), a long strip-shaped polarizing plate 40 wound in a roll shape having an optical axis (dotted double arrow) along the length direction is obtained by a laser processing machine (carbon dioxide laser). When the length direction A of the polarizing plate is set to 0 °, the first polarized light having a large parallelogram shape is cut by a predetermined interval at an angle of 135 ° counterclockwise with respect to the length direction A. A body plate 42 was produced.
Subsequently, as shown in FIG. 7B, the large parallelogram-shaped first polarizer original plate 42 is formed into a parallelogram shape at predetermined intervals in parallel to both sides by the laser processing machine. After cutting, the first polarizer original plate 43 having a small parallelogram shape (at this stage, the long side oblique direction of the first polarizer original plate 43 having a small parallelogram shape and the polarizing plate optical axis direction are small. The short sides of the parallelogram-shaped first polarizer original plate 43 are equal to each other at 45 ° counterclockwise, and the small parallelogram is continuously formed as shown in FIG. Half-cutting is performed from the surface of the release film side of the first polarizer original plate 43 having a shape by the laser processing machine, the half-cut layer 51 is cut into a perfect circle shape, and the protective film 80 is cut to have a larger area than the polarizing plate. By doing so, the protective film 80 is a polarizing plate. A polarizing plate 21 for a liquid crystal device of Example 1 having a larger area and having a shape processing showing a polarizing plate arrangement when being attached to the surface of the liquid crystal cell on the outer surface of the polarizing plate shape of the protective film 80 is produced. did.

(Example 2)
Example 1 Half-cutting is performed by the laser processing machine (carbon dioxide gas laser) used in Example 1 from the protective film side surface of the first polarizing plate of a small parallelogram, and the half-cut layer has a perfect circle shape and a separation. The mold film has a larger area than the polarizing plate in the same manner as in Example 1 except that the mold film is cut to have a larger area than the polarizing plate. Then, a polarizing plate for a liquid crystal device of Example 2 on which shape processing indicating the arrangement of polarizing plates when being applied to the surface of the liquid crystal cell was performed was produced.

(Example 3)
As shown in FIG. 8A, a long strip-shaped polarizing plate 40 wound in a roll shape having an optical axis (dotted double arrow) along the length direction is obtained by a laser processing machine (carbon dioxide laser). When the length direction A of the polarizing plate is set to 0 °, the second polarized light having a large parallelogram shape is cut at predetermined intervals at an angle of 135 ° counterclockwise with respect to the length direction A. A body plate 44 was produced.
Subsequently, as shown in FIG. 8B, the large parallelogram-shaped polarizer original plate 44 is cut into a rectangular shape at a predetermined interval perpendicular to both long sides by the laser processing machine. From the first rectangular original plate 45 having a small rectangular shape (at this stage, the optical axis direction of the first rectangular original plate 45 having a small rectangular shape is half of the angle formed by the short side and the long side. Then, as shown in FIG. 8 (c), half-cutting is performed by the laser processing machine from the surface of the release film 93 side of the first rectangular polarizer original plate 45 having a small rectangular shape. 45 (polarizing plate 94) is square-shaped, and protective film 90 is cut to have a larger area than polarizing plate 94, and then the optical axis direction of polarizing plate 94 is shown on the outer surface of the polarizing plate shape of protective film 90. Laser cutting with a direction cut By carrying out with the machine, the protective film has a larger area than the polarizing plate 94, and the shape processing showing the polarizing plate arrangement when pasting on the liquid crystal cell surface is performed on the polarizing plate outer surface of the protective film A polarizer 22 for a liquid crystal device of Example 3 was produced.

Example 4
The protective film has a larger area than the polarizing plate in the same manner as in Example 3 except that a Thomson-type hydraulic punching machine is used instead of the laser processing machine used in Example 3, and protection is achieved. A polarizing plate for a liquid crystal device of Example 4 was produced in which the outer surface of the polarizing plate shape of the film was subjected to shape processing showing the polarizing plate arrangement when pasted on the surface of the liquid crystal cell.

(Example 5)
The protective film has a larger area than the polarizing plate in the same manner as in Example 3 except that a continuous automatic cutting machine (super cutter) is used instead of the laser processing machine used in Example 3. A polarizing plate for a liquid crystal device of Example 5 was produced in which the outer surface of the polarizing plate shape of the protective film was subjected to shape processing indicating the arrangement of the polarizing plate when pasted on the surface of the liquid crystal cell.

(Example 6)
Example 3 From the protective film side surface of the first rectangular original plate of small rectangular shape, half-cutting is performed by the laser processing machine (carbon dioxide laser) used in Example 3, the half-cut layer is square-shaped, and the release film is After cutting so that the area is larger than the polarizing plate, the laser processing machine is used to cut the 45 ° direction indicating the optical axis direction of the polarizing plate on the outer surface of the polarizing plate shape of the release film. In the same manner as in Example 3, the release film has a larger area than the polarizing plate, and on the outer surface of the polarizing plate shape of the release film, shape processing is performed to indicate the arrangement of the polarizing plate when pasted on the liquid crystal cell surface. A polarizer for a liquid crystal device of Example 6 was prepared.

(Example 7)
As shown in FIG. 9 (a), a long strip-shaped polarizing plate 40 wound in a roll shape having an optical axis along the length direction (a double-dotted arrow, the same applies hereinafter) is converted into a laser processing machine (carbon dioxide gas). When the longitudinal direction A of the polarizing plate is set to 0 ° by a laser), the large rectangular polarizer is cut at predetermined intervals at an angle of 90 ° counterclockwise with respect to the longitudinal direction A. An original plate 46 was produced.
Subsequently, as shown in FIG. 9B, the large rectangular-shaped polarizer original plate 46 is cut into a rectangular shape at predetermined intervals in parallel to both sides by the laser processing machine. After the second polarizer original plate 47 having the shape, as shown in FIG. 9 (c), the half-cut by the laser processing machine is performed from the surface of the release film 103 side of the second rectangular original plate 47 having the small rectangular shape. The half-cut layer 53 (polarizing plate 104) is cut into a square shape, and the protective film 100 is cut to have a larger area than the polarizing plate 104. A small rectangular cut (die-cut) 72 that does not indicate the axial direction is performed by the laser processing machine, and the protective film is a polarizing plate by using the polarizer as a mark when affixing to the liquid crystal cell surface. A polarizer 23 for a liquid crystal device of Example 7 having an area larger than 04 and having a shape processing showing a polarizing plate arrangement when being attached to the surface of the liquid crystal cell on the polarizing plate outer surface of the protective film is produced. did.

(Example 8)
After forming the small rectangular first polarizer original plate 45 in the same manner as in Example 3, as shown in FIG. 10A, from the surface of the release film 93 side of the small rectangular first polarizer original plate 45. Half-cutting was performed with the laser processing machine (carbon dioxide gas laser) used in Example 3, and the half-cut layer 54 (polarizing plate 110) was square-shaped and the protective film 90 was cut to have a larger area than the polarizing plate 110. Thereafter, a dry decal (instant lettering) 73 that does not show the optical axis direction of the polarizing plate 110 on the outer surface of the polarizing plate shape of the protective film 90 but can be used as a mark when the polarizer is attached to the surface of the liquid crystal cell. By attaching the protective film, the protective film has a larger area than the polarizing plate 110, and the polarizing film is attached to the liquid crystal cell surface on the polarizing plate outer surface of the protective film. The liquid crystal device for polarizer 24 of Example 8 indicia processing has been performed showing a plate disposed was produced.

  As described above, according to the configuration of the polarizer for a liquid crystal device of the present invention and the method for producing the same, the liquid crystal layer is sandwiched between the polarizing plate-shaped outer surface having a larger area than the polarizing plate of the polarizer protective film or the release film. Since the processing that indicates the arrangement of the polarizing plate when the polarizer is attached to at least one surface of the liquid crystal cell composed of a pair of substrates is added without affecting the polarizing plate itself, the polarizing plate is optically Without requiring an outer shape cut that matches the axial direction, it is possible to easily grasp the polarizing plate arrangement when attaching the polarizer to the surface of the liquid crystal cell simply and accurately by visual observation. According to the method, the polarizing plate has a larger area than the polarizing plate, and the polarizing plate is attached to the surface of the liquid crystal cell with respect to the portion that becomes the polarizing plate outer surface of the protective film or release film of the polarizing plate. Show placement As so subjected to processing, it can be processed without affecting the polarizing plate, in which it is possible to manufacture with high yield polarizer that desired processing is performed.

1: CF side polarizing plate, 2: TFT side polarizing plate,
3, 92, 95, 102, 105, 111: adhesive layer,
4, 80, 90, 100: protective film,
5, 93, 96, 103, 106, 112: release film,
6: Polarizing film, 7: Support film,
10, 91, 94, 101, 104, 110: Polarizing plate,
20: Polarizer for liquid crystal device, 21: Polarizer for liquid crystal device of Example 1,
22: Polarizer for liquid crystal device of Example 3, 23: Polarizer for liquid crystal device of Example 7
24: Polarizer for liquid crystal device of Example 8
31: Liquid crystal device, 32: Liquid crystal cell, 40: Polarizing plate, 41: Polarizing plate,
42: A first polarizer original plate having a large parallelogram shape,
43: A first polarizer original plate having a small parallelogram shape,
44: a second polarizer original plate having a large parallelogram shape, 45: a first polarizer original plate having a small rectangular shape,
46: Large rectangular-shaped polarizer original plate, 47: Small rectangular-shaped second polarizer original plate,
50 to 54: half-cut layer, 61, 62: an example showing a polarizing plate-shaped outer surface,
70: hollow, 71: mark, 72: rectangular cut (die cutting),
73 Dry Decal (Illustration lettering)

Claims (7)

A polarizer for a liquid crystal device to be attached to at least one surface of a liquid crystal cell comprising a pair of substrates with a liquid crystal layer sandwiched therebetween,
The polarizer is
At least one polarizing plate having an optical axis exhibiting optical anisotropy;
A protective film covering one surface of the polarizing plate;
An adhesive layer provided to cover the other surface of the polarizing plate;
A release film covering the adhesive layer,
Either one of the protective film or the release film has a larger area than the polarizing plate,
In the protective film or release film having a larger area than the polarizing plate, the processing for indicating the arrangement of the polarizing plate when the polarizer is attached to the surface of the liquid crystal cell is added to the outer surface of the polarizing plate shape. A polarizer for a liquid crystal device.   The polarizer for a liquid crystal device according to claim 1, wherein the processing is shape processing.   3. The polarizer for a liquid crystal device according to claim 1, wherein one side of a protective film or a release film having an area larger than that of the polarizing plate has a shape parallel to an optical axis direction of the polarizing plate. .   4. The polarizer for a liquid crystal device according to claim 1, wherein at least one side of the polarizing plate and one side of the substrate are parallel to each other.   The polarizer for a liquid crystal device according to any one of claims 1 to 4, wherein the polarizing plate has a regular polygonal shape.   The polarizing plate has a circular shape. The polarizing plate for liquid crystal devices of any one of Claims 1-3. A method for producing a polarizer for a liquid crystal device to be attached to at least one surface of a liquid crystal cell comprising a pair of substrates with a liquid crystal layer sandwiched therebetween,
The polarizer is
At least one polarizing plate having an optical axis exhibiting optical anisotropy;
A protective film covering one surface of the polarizing plate;
An adhesive layer provided to cover the other surface of the polarizing plate;
A release film covering the adhesive layer,
Forming a polarizer original plate of a predetermined shape from the polarization original plate;
Either one of the protective film or release film of the polarizer original plate has an area larger than that of the polarizing plate, and the polarizing film is formed on the outer surface of the polarizing plate of the protective film or release film having the large area. And a step of forming a polarizing body having a predetermined shape by processing so as to show a polarizing plate arrangement when the body is attached to the surface of the liquid crystal cell. .

Images