JP5606013B2 - Optical member and manufacturing method thereof - Google Patents

Description

  The present invention relates to an optical member having a color filter function and a polarization function, and more particularly to an optical member that can be wound into a thin and long roll that has never been obtained and a method for manufacturing the same.

  In various image display devices such as a liquid crystal display device and an organic EL display, in general, a polarizing plate, a retardation plate, or an elliptical polarizing plate is used for polarization control and optical compensation. Further, a color liquid crystal display device for performing color display and a color organic EL display use a color filter substrate (Patent Document 1, etc.).

  Such a color liquid crystal display device includes a sheet-like glass substrate having a black matrix, a colored layer composed of three primary colors of red (R) / green (G) / blue (B), and a common transparent electrode layer. An alignment layer is formed on the substrate, an alignment layer is formed on a TFT substrate having a thin film transistor (TFT) and a pixel electrode, and these two substrates are opposed to the alignment layer to maintain a predetermined gap. A liquid crystal panel manufactured by filling a liquid crystal material to form a liquid crystal layer and bonding and fixing a color filter substrate and a TFT substrate with a sealing material around the liquid crystal layer is used. In order to display an image by controlling the polarization, a transmissive color liquid crystal display device is obtained by attaching polarizing plates to the outer surfaces of the color filter substrate and the TFT substrate of the liquid crystal panel.

  Further, in the reflective and transflective liquid crystal display devices that provide a light reflection function on the back surface of the color liquid crystal display device and display an image using reflected light incident from the surface of the display device, the color of the liquid crystal panel A circularly polarizing plate is attached to the filter substrate.

  Various methods such as an RGB color separation method, a color conversion method, a microcavity method, and a color filter method have been proposed as colorization methods for organic EL displays. Among these, the color filter method includes a method in which an RGB color filter substrate is combined with white light emission. This uses a color filter substrate in which a color filter with TFT is formed on a transparent substrate made of glass or plastic. First, a TFT is formed on a transparent substrate, and then an RGB color filter layer is formed. Next, a transparent anode electrode connected to the TFT is formed on the color filter layer. Next, an organic EL layer composed of a hole transport layer, a white light emitting layer, an electron transport layer and the like is formed, and then a cathode electrode is formed. The cathode electrode is usually made of lithium fluoride (LiF) or aluminum (Al) and is formed as a common electrode. Next, a sealing layer is formed so as to cover the display area, and finally a circularly polarizing plate is attached to the outside of the color filter substrate to complete.

JP 2008-203447 A

  By the way, in such a manufacturing method of a color liquid crystal display device, after manufacturing a sheet-like liquid crystal panel using a sheet-like color filter substrate and a TFT substrate, a polarizing plate previously cut into a sheet, or a sheet-like in advance Therefore, the liquid crystal alignment direction and the direction of the optical axis of the optical film layer such as a polarizing plate or an elliptical polarizing plate vary from one liquid crystal panel to another. When the alignment direction of the liquid crystal and the optical axis of the optical film layer vary, there is a problem that display characteristics deteriorate, such as a decrease in contrast.

  Further, in the step of attaching the sheet-like optical film layer, it is impossible to avoid the trapping of dust and foreign matter, and there is a problem of yield reduction due to the occurrence of defects. In addition, since the color filter substrate is a sheet-like glass, it is manufactured while being continuously conveyed by a roll-to-roll method that is unwound from a so-called roll and wound on the roll to improve productivity and reduce color liquid crystal at a low cost. There is a problem that it cannot be used as a member for manufacturing a display device.

  The present invention has been made in view of the above points, and provides an optical member that has a color filter function and a polarization function, and that can be wound into a thin and long roll with excellent display characteristics, and a method for manufacturing the same. The purpose is to do.

  In order to solve the above-described problems and achieve the object, the present invention is configured as follows.

The invention according to claim 1 is an optical member composed of at least a color filter substrate and an optical film layer,
The color filter substrate is a configuration in which a color filter layer is formed on a substrate of at least a long plastic film,
The optical film layer is formed through a pressure-sensitive adhesive layer on the surface of the substrate where the color filter layer is not formed,
On the color filter substrate, a black matrix and a pattern of a colored layer are formed,
The optical film layer is a sheet-like elliptically polarizing plate ,
The sheet-like elliptically polarizing plate is composed of a laminate of a polarizing plate, an adhesive layer, a half-wave plate, an adhesive layer, and a quarter-wave plate,
The sheet-like elliptically polarizing plate, in a position overlapping with the pattern of the color the filter is formed on the substrate the black matrix and the colored layer,
It is an optical member formed by arranging two or more parallel and spaced apart along a long longitudinal direction on the color filter substrate.

In the invention described in claim 2 , the pressure-sensitive adhesive for forming the pressure-sensitive adhesive layer includes a (meth) acrylic polymer, a silicone-based polymer, a polyester, a polyurethane, a polyamide, a polyether, a fluorine-based polymer, and a base polymer. an optical member according to claim 1, characterized in that suitably selected in the polymer of the rubber-based polymer over.

The invention according to claim 3, wherein the total thickness of the optical member is at 0.3mm or less, the optical member according to claim 1 or claim 2, characterized in that it is possible to wind into a roll It is.

Invention of Claim 4 is a manufacturing method of the optical member comprised from a color filter substrate and an optical film layer at least,
The color filter substrate is a configuration formed on at least a long plastic film substrate,
On the color filter substrate, a black matrix and a pattern of a colored layer are formed,
Forming the optical film layer through an adhesive layer on the surface of the substrate where the color filter layer is not formed,
The optical film layer is a sheet-like elliptically polarizing plate ,
The sheet-like elliptically polarizing plate is composed of a laminate of a polarizing plate, an adhesive layer, a half-wave plate, an adhesive layer, and a quarter-wave plate,
The sheet-like elliptically polarizing plate, in a position overlapping with the pattern of the color the filter is formed on the substrate the black matrix and the colored layer,
It is a method for manufacturing an optical member, wherein two or more sheets are arranged in parallel with a predetermined interval along a long longitudinal direction on the color filter substrate.

In the invention according to claim 5 , the total thickness of the optical member is 0.3 mm or less,
Forming the optical film layer through an adhesive layer on the surface of the substrate where the color filter layer is not formed;
After the step, the step of winding the optical member into a roll,
The method for manufacturing an optical member according to claim 4 , comprising:

In the invention described in claim 6 , the pressure-sensitive adhesive for forming the pressure-sensitive adhesive layer includes a (meth) acrylic polymer, a silicone-based polymer, a polyester, a polyurethane, a polyamide, a polyether, a fluorine-based polymer, and a base polymer. a method for producing an optical member according to claim 4 or claim 5, characterized in that suitably selected in the polymer of the rubber-based polymer over.

  With the above configuration, the present invention has the following effects.

In the invention according to claim 1, claim 2, claim 4, and claim 6 , the color filter substrate is formed with a color filter layer on at least a long plastic film substrate, The integrated optical member can be used for manufacturing a color liquid crystal display device by a roll-to-roll method, and productivity can be improved and costs can be reduced. Further, an optical film layer is formed on the surface of the substrate on which the color filter layer is not formed via an adhesive layer, and the color filter substrate and the optical film layer are integrated in advance via the adhesive layer. Since it is a member, it is possible to omit the step of attaching a sheet-like optical film layer after manufacturing a liquid crystal panel as in the prior art, and to prevent the occurrence of defects due to sandwiching of dust, foreign matter, etc. in this attaching step. In this way, it is possible to obtain a thin and long optical member that enables a color liquid crystal display device having a small display characteristic and a small variation between the alignment direction of the liquid crystal and the optical axis direction of the optical film layer. In addition, since the long color filter substrate and the optical film layer are integrated in advance, there is little variation between the pixel array direction of the color filter substrate and the optical axis of the optical film layer, and the color liquid crystal has excellent display characteristics. A thin and long optical member that enables a display device can be easily manufactured. The optical film layer is a sheet-like elliptically polarizing plate, and the sheet-like elliptically polarizing plate is a laminate of a polarizing plate, an adhesive layer, a half-wave plate, an adhesive layer, and a quarter-wave plate. The sheet-like elliptically polarizing plate is formed at a position where the black matrix formed on the color filter substrate and the pattern of the colored layer overlap with each other at a predetermined interval along the long longitudinal direction on the color filter substrate. Since the long color filter substrate and the optical film layer are integrated before being assembled into the liquid crystal panel, the alignment direction of the liquid crystal and the direction of the optical axis of the optical film layer are A thin and long optical member that enables a color liquid crystal display device with little variation and excellent display characteristics can be obtained. As described above, since the long color filter substrate and the optical film layer are integrated in advance, there is little variation between the direction of the pixel arrangement of the color filter substrate and the optical axis of the optical film layer, and the display characteristics. It is possible to easily manufacture a thin and long optical member that enables an excellent color liquid crystal display device.

In the invention according to claim 3 , the total thickness of the optical member is 0.3 mm or less, and the optical member can be wound in a roll shape. When the thickness exceeds 0.3 mm, the curvature radius of the optical member can be bent. Since it becomes large, the diameter of the roll core to wind up becomes large, and when the maximum diameter of the wound roll is compared as the same, the winding length with respect to one roll is reduced.

In the invention according to claim 5 , the total thickness of the optical member is 0.3 mm or less, and after the step of forming the optical film layer through the pressure-sensitive adhesive layer on the surface of the substrate on which the color filter layer is not formed, A step of winding the optical member into a roll is provided, and when the total thickness of the optical member is 0.3 mm or less, a longer roll-shaped optical member can be made into one roll. As a result, when used in the production of a roll-to-roll color liquid crystal display device, production time and member loss due to replacement of roll-shaped optical members are reduced, productivity is improved, and cost is reduced. It becomes possible. When the total thickness of the optical member exceeds 0.3 mm, the winding length with respect to one roll is reduced.

It is an outline schematic diagram showing a 1st embodiment of an optical member. It is sectional drawing of 1st Embodiment of an optical member. It is an outline schematic diagram showing a 2nd embodiment of an optical member. It is sectional drawing of 2nd Embodiment of an optical member. It is an outline schematic diagram showing a 1st embodiment of a manufacturing method of an optical member. It is an outline schematic diagram showing a 2nd embodiment of a manufacturing method of an optical member.

Embodiments of the optical member and the manufacturing method thereof according to the present invention will be described below. The embodiment of the present invention shows the most preferable mode of the present invention, and the present invention is not limited to this.
[First Embodiment of Optical Member]
A first embodiment of this optical member will be described with reference to FIGS. FIG. 1 is a schematic external view showing a first embodiment of an optical member, and FIG. 2 is a sectional view of the first embodiment of the optical member.

  The optical member 1 includes at least a color filter substrate 3 and an optical film layer 2. The color filter substrate 3 has a color filter layer 3b formed on at least a long plastic film substrate 3a, and the surface of the substrate 3a on the side where the color filter layer 3b is not formed is optically connected via an adhesive layer 4. A film layer 2 is formed.

  The color filter substrate 3 has a color filter layer 3b formed on at least a long plastic film substrate 3a. The optical member 1 integrated with the optical film layer 2 is unwound from a roll and wound around the roll. It can be used for manufacturing a color liquid crystal display device by a roll-to-roll method, and productivity can be improved and costs can be reduced.

  Further, the optical film layer 2 is formed on the surface of the substrate 3a where the color filter layer 3b is not formed via the pressure-sensitive adhesive layer 4, and the color filter substrate 3 and the optical film layer 2 preliminarily form the pressure-sensitive adhesive layer 4. Since the optical member 1 is integrated with the liquid crystal panel, the process of pasting the sheet-like optical film layer 2 after manufacturing the liquid crystal panel can be omitted as in the prior art. Can be prevented. Both the color filter substrate 3 and the optical film layer 2 are formed into a long shape, and the roll-to-roll method is used to easily apply the film to the film using an edge position control device (EPC) that is generally used. The longitudinal positions can be aligned and pasted.

  In this way, it is possible to obtain a thin and long optical member 1 that enables a color liquid crystal display device having a small variation in the alignment direction of the liquid crystal and the optical axis direction of the optical film layer 2 and having excellent display characteristics. it can. In addition, a thin and long optical member 1 that allows a color liquid crystal display device having excellent display characteristics with little variation between the pixel array direction of the color filter substrate 3 and the optical axis of the optical film layer 2 is easily manufactured. can do.

  The color filter substrate 3 has a color filter layer 3b formed on at least a long plastic film substrate 3a, but also includes a gas barrier layer, a black matrix, an RGB colored layer, and a common transparent electrode layer. Is desirable. Usually, the black matrix and the colored layer are regularly arranged in the vertical and horizontal directions to form a square pattern.

  As the long plastic film substrate 3a, a transparent resin film can be used, and the type thereof is not particularly limited. Examples of suitable plastic films include polycarbonate, polysulfone resin, olefin resin, and cyclic polyolefin resin. The thickness of the plastic film substrate 3a is, for example, about 50 to 200 μm.

  The gas barrier layer is formed of a thin film such as SiOx or SiNx by a vacuum film forming method such as a sputtering method, a CVD method, or a vacuum evaporation method. The thickness of the gas barrier layer is, for example, about 10 to 100 nm. Black matrix has a method of forming a thin metal film of chromium or the like by a vacuum film formation method such as sputtering or vacuum deposition, and patterning this thin film by a wet etching method or a dry etching method. Examples include a method in which a photosensitive resin layer containing light-shielding particles such as carbon fine particles and metal oxide is formed by a slit coating method, a micro gravure coating method, etc., and the photosensitive resin layer is patterned. it can. The thickness of the black matrix by the photosensitive resin layer is, for example, about 0.5 to 2 μm.

  Similarly to the formation of the black matrix, the RGB colored layer is formed by repeating the process of forming a colored photosensitive resin layer and patterning with each of red, green, and blue resins, or RGB An example is a method in which a colored resin ink is applied and formed for each color pattern of RGB by an inkjet method. The thickness of the RGB colored layer is, for example, about 1 to 2 μm. The colored layer is not limited to the three primary colors RGB, but may be a multicolor such as four colors obtained by adding yellow (Y) or emerald (blue green) to RGB, and five colors obtained by adding Y and cyan (C) to RGB. The common transparent electrode layer includes a method of forming a thin film of indium tin oxide (ITO), indium zinc oxide (IZO), zinc oxide (ZnO) or the like by a sputtering method, a vacuum deposition method, or the like. The method of forming is the most common. The thickness of the common transparent electrode layer is, for example, about 50 to 200 nm.

  As long as the optical film layer 2 is 1 or more types chosen from a polarizing plate, a phase difference plate, and a circularly-polarizing plate, any may be sufficient. By making the optical film layer integrated with the color filter substrate into a polarizing plate, it can be applied to the production of a transmissive color liquid crystal display device by a roll-to-roll method. Further, by using an optical film layer as a retardation plate, it can be applied to the production of a reflective or transflective color liquid crystal display device by a roll-to-roll method. In this case, the polarizing plate is bonded in the last manufacturing process of the color liquid crystal display device. In addition, an elliptical polarizing plate in which a polarizing plate and a retardation plate are combined in advance for the optical film layer can be applied to the production of a reflective or transflective color liquid crystal display device by a roll-to-roll method.

  The polarizing plate has a function of extracting linearly polarized light from incident light, and the type thereof is not particularly limited. As an example of a suitable polarizing plate, one having a configuration in which a transparent protective layer is provided on both surfaces of a polarizing film in which a dichroic dye is adsorbed and oriented on a polyvinyl alcohol resin can be exemplified. As the dichroic dye, iodine or a dichroic organic dye is used. Moreover, as a transparent protective layer, a triacetyl cellulose film etc. are used, for example. This protective layer may be provided only on one side, not on both sides of the polarizing film. The thickness of the polarizing film is, for example, about 5 to 50 μm, and the thickness of the entire polarizing plate is, for example, about 50 to 200 μm.

  The retardation plate is usually composed of a stretched resin film. Examples of the resin constituting the retardation plate include polycarbonate, polystyrene, polymethyl methacrylate, polysulfone resin, olefin resin, cyclic polyolefin resin, cellulose acetate resin, and the like. The thickness of the retardation plate is, for example, about 10 to 100 μm.

  Further, as the retardation plate, a coating type retardation plate formed by applying a polymerizable liquid crystal composition on a transparent substrate and aligning it, and then fixing the alignment can be used. The material of the substrate of the coating type retardation plate is not particularly limited as long as it is transparent. Examples of suitable substrates include ceramics and resins. As the resin for the substrate, triethylcellulose, polyethylene terephthalate, polyolefin, polycarbonate, polyethersulfone, or the like can be used. In the case of this coating type retardation plate, a long and seamless retardation plate can be obtained by a continuous method such as a roll-to-roll method using a long film substrate. As the polymerizable liquid crystal composition, a compound having a polymerizable group which exhibits liquid crystallinity alone or in a composition with another liquid crystal compound, for example, JP-A-7-294735, JP-A-8-3111, Examples thereof include a rod-like polymerizable liquid crystal compound having a polymerizable functional group as described in Japanese Unexamined Patent Publication No. 2002-308831. The thickness of the coating type retardation plate is, for example, about 0.5 to 10 μm, and the thickness of the entire retardation plate when using a resin substrate is, for example, about 50 to 200 μm.

  The circularly polarizing plate is composed of a laminate of a linearly polarizing plate and a quarter wavelength plate or a laminate of a linearly polarizing plate, a half wavelength plate, and a quarter wavelength plate.

  In this embodiment, the optical film layer 2 is constituted by a laminate of a polarizing plate 11, a half-wave plate 22 and a quarter-wave plate 33.

  The pressure-sensitive adhesive for forming the pressure-sensitive adhesive layer 4 is, for example, a polymer such as (meth) acrylic polymer, silicone-based polymer, polyester, polyurethane, polyamide, polyether, fluorine-based polymer, and rubber-based polymer as a base polymer. It can select suitably and can be used.

  The pressure-sensitive adhesive layer 4 has features such as prevention of foaming and peeling phenomenon due to moisture absorption, deterioration of optical characteristics due to thermal expansion difference and the like, prevention of warpage of the image display panel, and formation of an image display device having high quality and excellent durability. More preferred are those with low hygroscopicity and excellent heat resistance.

  Among these, a (meth) acrylic polymer that is excellent in optical transparency and exhibits appropriate wettability, cohesiveness, and adhesive pressure-sensitive adhesive properties is preferable. The (meth) acrylic polymer refers to a polymer containing alkyl (meth) acrylate as a main monomer unit. In this specification, acrylate or / and methacrylate is represented as (meth) acrylate.

  The pressure-sensitive adhesive layer 4 is formed by laminating the pressure-sensitive adhesive layer 4 on an optical film such as a polarizer, a polarizing plate or a retardation plate. The forming method is not particularly limited, and examples thereof include a method of applying an adhesive solution to an optical film and drying, a method of transferring using a release sheet provided with an adhesive layer and the like.

  As a constituent material of the release sheet, paper, polyethylene, polypropylene, polyethylene terephthalate and other synthetic resin films, rubber sheets, paper, cloth, non-woven fabric, nets, foam sheets and metal foils, and appropriate thin leaf bodies such as laminates thereof Etc. In order to improve the peelability from the pressure-sensitive adhesive layer, the surface of the release sheet may be subjected to a low-adhesive release treatment such as silicone treatment, long-chain alkyl treatment, and fluorine treatment as necessary.

The thickness of the pressure-sensitive adhesive layer 4 is generally 1 to 30 μm, preferably 5 to 25 μm, and more preferably 5 to 15 μm.
[Second Embodiment of Optical Member]
A second embodiment of this optical member will be described with reference to FIGS. FIG. 3 is a schematic external view showing a second embodiment of the optical member, and FIG. 4 is a cross-sectional view of the second embodiment of the optical member. In the second embodiment of the optical member, the same components as those in the first embodiment are denoted by the same reference numerals, and description thereof is omitted.

  In this second embodiment, the optical film layer 2 is formed by arranging at least two sheet-like elliptical polarizing plates 60 in parallel with the long longitudinal direction on the color filter substrate 3. The sheet-like elliptically polarizing plate 6 is arranged at a position where it overlaps with the black matrix formed on the color filter substrate 3 and the pattern of the colored layer.

  The sheet-like elliptically polarizing plate 60 is configured by stacking the polarizing plate 11, the pressure-sensitive adhesive layer 45, the half-wave plate 22, the pressure-sensitive adhesive layer 46, and the quarter-wave plate 33. The optical film layer 2 is formed by arranging at least two sheet-like elliptical polarizing plates 60 in parallel with the long longitudinal direction on the color filter substrate 3, and the alignment direction of the liquid crystal and the light of the optical film layer 2. It is possible to obtain a thin and long optical member 1 that enables a color liquid crystal display device with little variation in the axial direction and excellent display characteristics. In addition, a thin and long optical member 1 that enables a color liquid crystal display device with less variation between the pixel array direction of the color filter substrate 3 and the optical axis of the optical film layer 2 and excellent display characteristics can be easily obtained. Can be manufactured.

[First Embodiment of Manufacturing Method of Optical Member]
A first embodiment of the method for manufacturing the optical member will be described with reference to FIG. FIG. 5 is a schematic external view showing a first embodiment of a method for producing an optical member.

The first embodiment is a method for manufacturing the optical member 1 shown in FIGS. 1 and 2, and unwinds the long color filter substrate 3 from the color filter substrate unwinding portion 301. The long adhesive layer protective film 400 is unwound from the adhesive layer unwinding section 401, and the adhesive layer protective film 400 has both sides protected by one protective film 400a and the other protective film 400b. The protective film 400a is peeled from the pressure-sensitive adhesive layer 4 at the first peeling portion 402a, and the protective film 400a is wound around the first pressure-sensitive adhesive layer protective film winding portion 402.

In the pressure-sensitive adhesive layer bonding part 403, the pressure-sensitive adhesive layer 4 protected by the other protective film 400b is bonded to the color filter substrate 3, and the other peeling layer 404a is bonded to the other of the pressure-sensitive adhesive layer 4 after the bonding. The protective film 400 b is peeled off from the pressure-sensitive adhesive layer 4, and the other protective film 400 b is wound around the second pressure-sensitive adhesive layer protective film winding portion 404.

  The long optical film layer 2 is unwound from the optical film layer unwinding part 201, the optical film layer 2 is bonded to the pressure-sensitive adhesive layer 4 in the optical film bonding part 202, and the optical member 1 is formed by this bonding. The optical member is wound around the optical member winding unit 101 in a roll shape.

  Thus, the optical film layer 2 is formed through the adhesive layer 4 on the surface of the color filter substrate 3 on which the color filter layer 2 is not formed, with the total thickness of the optical member 1 being 0.3 mm or less. After the step, the optical member 1 is provided in a roll shape, and when the total thickness of the optical member 1 is 0.3 mm or less, the winding roll core diameter of the optical member winding portion 101 is about 3 inches to 4 inches. It is possible to make the optical member 1 in a longer roll shape into one roll. As a result, when used for manufacturing a color liquid crystal display device in a roll-to-roll system, the manufacturing time and member loss due to replacement of the roll-shaped optical member 1 are reduced, the productivity is improved, and the cost is reduced. Is possible. When the total thickness of the optical member 1 exceeds 0.3 mm, the winding length with respect to one roll is reduced.

[Second Embodiment of Manufacturing Method of Optical Member]
A second embodiment of the method for manufacturing the optical member will be described with reference to FIG. FIG. 6 is a schematic external view showing a second embodiment of the method for producing an optical member.

  This second embodiment is a method for manufacturing the optical member 1 shown in FIGS. 3 and 4, in which a sheet-like elliptically polarizing plate 60 is elliptically polarized by an elliptically polarizing plate supply means 603. It supplies to the plate supply stand 602. The elliptical polarizing plate supply base 602 reciprocates between the A position and the B position, the A position is a position where the elliptical polarizing plate 60 is received, and the B position is a position where the elliptical polarizing plate 60 is bonded to the adhesive layer 4. is there. The elliptical polarizing plate supply base 602 receives the elliptical polarizing plate 60 that is moved by driving the elliptical polarizing plate supply means 603 at the A position, moves to the B position, and the elliptical polarizing plate bonding means 604 transfers the elliptical polarizing plate 60 to the carrier. It is affixed on the adhesive layer 5a protected by the protective film 5b of the film 5.

  The elliptically polarizing plate bonding means 604 is a rubber-made bonding roll. The elliptically polarizing plate supply unit 601 is a table on which a large number of sheet-like elliptically polarizing plates can be stacked. The elliptically polarizing plate supply means 603 has a mechanism that allows a sheet-like elliptically polarizing plate to be taken out from the elliptically polarizing plate supply unit 601 with a vacuum suction plate and delivered to the elliptically polarizing plate supply base 602 at the A position. The means for taking out and delivering the sheet-like elliptically polarizing plate may be a method other than the vacuum suction plate, such as lightly adhering with a slight adhesive. Although not shown in the present embodiment, when the sheet-like elliptically polarizing plate 60 is attached to the carrier film 5, there may be a function for aligning both, for example, a CCD camera and an image recognition device.

  The carrier film 5 has one of the pressure-sensitive adhesive layers 5a protected by the protective film 5c and the other protected by the protective film 5b. The carrier film unwinding unit 501 unwinds the carrier film 5, and the one protective film 5c Is peeled off at the peeling portion 502 a and wound around the carrier film protective film winding portion 502. As the carrier film 5, a slightly adhesive PET film or the like is used. The thickness of the carrier film 5 is, for example, about 50 to 150 μm.

  The elliptical polarizing plate bonding means 604 is disposed at the B position, and the elliptical polarizing plate bonding means 604 is in the conveying direction of the carrier film 5 with the elliptical polarizing plate supply base 602 stopped at the B position. To the opposite direction, and the elliptically polarizing plate 60 is bonded to the adhesive layer 5a. A protective film (not shown) may be attached in advance to the surface of the elliptical polarizing plate 60 to be bonded to the carrier film 5, in which case the elliptical polarizing plate supply base moves from the A position to the B position. In the meantime, the protective film is removed from the elliptically polarizing plate.

  The long pressure-sensitive adhesive layer protective film 400 is unwound from the pressure-sensitive adhesive layer unwinding portion 401, and one protective film 400a is peeled off from the pressure-sensitive adhesive layer 4 at the first peeling portion 402a, whereby the first pressure-sensitive adhesive layer protective film. One protective film 400 a is wound around the winding portion 402. The pressure-sensitive adhesive layer bonding portion 403 bonds the pressure-sensitive adhesive layer 4 of the other protective film 400b to the carrier film 5, and the pressure-sensitive adhesive layer 4 is bonded to the sheet-like elliptically polarizing plate 60. The other protective film 400b of the pressure-sensitive adhesive layer 4 is peeled from the pressure-sensitive adhesive layer 4 at the peeling portion 404a, the other protective film 400b is wound around the second pressure-sensitive adhesive layer protective film winding portion 404, and an optical film bonding portion It is conveyed to 202.

  The long color filter substrate 3 is unwound from the color filter substrate unwinding portion 301, the color filter substrate 3 is bonded to the adhesive layer 4 at the optical film bonding portion 202, and the optical member 1 is formed by this bonding. The optical member is wound around the optical member winding unit 101 in a roll shape.

  Thus, the optical film layer 2 is formed by arranging at least two sheet-like elliptical polarizing plates 60 in parallel with the long longitudinal direction on the color filter substrate 3, and the alignment direction of the liquid crystal and the optical film It is possible to obtain a thin and long optical member 1 that enables a color liquid crystal display device that has little variation in the direction of the optical axis of the layer 2 and that has excellent display characteristics. In addition, a thin and long optical member that allows a color liquid crystal display device having excellent display characteristics with little variation between the pixel array direction of the color filter substrate 3 and the optical axis of the optical film layer 2 is easily manufactured. can do.

  The present invention relates to an optical member having a color filter function and a polarization function, and in particular, can be applied to an optical member that can be wound into an unprecedented thin and long roll, and a method for manufacturing the same. It can be wound into a thin and long roll having a function and excellent display characteristics. As described above, the color liquid crystal display device has been described in this specification, but the present invention is applicable to various image display devices having a color filter function and a polarization function, such as a color organic EL display.

DESCRIPTION OF SYMBOLS 1 Optical member 2 Optical film layer 3 Color filter substrate 3a Plastic film substrate 3b Color filter layer 4 Adhesive layer 5 Carrier film 5a Adhesive layer 5b Protective film 5c Protective film 11 Polarizing plate 22 1/2 wavelength plate 33 1/4 Wavelength plate 45 Adhesive layer 46 Adhesive layer 60 Sheet-like elliptically polarizing plate 101 Optical member winding unit 201 Optical film layer unwinding unit 202 Optical film bonding unit 301 Color filter substrate unwinding unit 400 Adhesive layer protective film 400a One protective film 400b The other protective film 401 Adhesive layer unwinding part 402 First adhesive layer protective film winding part 402a First peeling part 403 Adhesive layer laminating part 404 Second adhesive layer protective film Winding unit 404a Second peeling unit 601 Elliptical polarizing plate supply unit 602 Elliptical polarization Plate supply base 603 Ellipsoidal polarizing plate supply means 604 Ellipsoidal polarizing plate bonding means

Claims (6)

An optical member comprising at least a color filter substrate and an optical film layer,
The color filter substrate is a configuration in which a color filter layer is formed on a substrate of at least a long plastic film,
The optical film layer is formed through a pressure-sensitive adhesive layer on the surface of the substrate where the color filter layer is not formed,
On the color filter substrate, a black matrix and a pattern of a colored layer are formed,
The optical film layer is a sheet-like elliptically polarizing plate ,
The sheet-like elliptically polarizing plate is composed of a laminate of a polarizing plate, an adhesive layer, a half-wave plate, an adhesive layer, and a quarter-wave plate,
The sheet-like elliptically polarizing plate, in a position overlapping with the pattern of the color the filter is formed on the substrate the black matrix and the colored layer,
An optical member formed by arranging two or more sheets parallel to each other at a predetermined interval along a long longitudinal direction on the color filter substrate. Pressure-sensitive adhesive for forming the pressure-sensitive adhesive layer, as a base polymer, (meth) acrylic polymer, silicone polymer, polyester, polyurethane, polyamide, polyether, a fluorine-based polymers and polymers of the rubber-based polymer over appropriately The optical member according to claim 1, wherein the optical member is selected and used. The total thickness of the optical member is at 0.3mm or less, the optical member according to claim 1 or claim 2, characterized in that it is possible to wind into a roll. A method for producing an optical member comprising at least a color filter substrate and an optical film layer,
The color filter substrate is a configuration formed on at least a long plastic film substrate,
On the color filter substrate, a black matrix and a pattern of a colored layer are formed,
Forming the optical film layer through an adhesive layer on the surface of the substrate where the color filter layer is not formed,
The optical film layer is a sheet-like elliptically polarizing plate ,
The sheet-like elliptically polarizing plate is composed of a laminate of a polarizing plate, an adhesive layer, a half-wave plate, an adhesive layer, and a quarter-wave plate,
The sheet-like elliptically polarizing plate, in a position overlapping with the pattern of the color the filter is formed on the substrate the black matrix and the colored layer,
A method for producing an optical member, wherein two or more sheets are arranged in parallel along a long longitudinal direction on the color filter substrate at a predetermined interval . The total thickness of the optical member is 0.3 mm or less,
Forming the optical film layer through an adhesive layer on the surface of the substrate where the color filter layer is not formed;
After the step, the step of winding the optical member into a roll,
The method for manufacturing an optical member according to claim 4 , comprising: Pressure-sensitive adhesive for forming the pressure-sensitive adhesive layer, as a base polymer, (meth) acrylic polymer, silicone polymer, polyester, polyurethane, polyamide, polyether, a fluorine-based polymers and polymers of the rubber-based polymer over appropriately the optical member manufacturing method according to claim 4 or claim 5, characterized by using select.