JP2012042794A - Color filter member for electronic paper, electronic paper, and manufacturing method of the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a color filter member for electronic paper which has flexibility, a barrier property, and good dimensional stability, is hard to generate a parallax when used for electronic paper, and can obtain good color display characteristics.SOLUTION: A color filter member for electronic paper comprises a glass substrate having flexibility, and a color filter layer and a transparent electrode layer which are laminated on one surface side of the glass substrate in no particular order. A display medium layer of the electronic paper is disposed on the side of the color filter layer and the transparent electrode layer.

Description

  The present invention relates to a color filter member used for electronic paper.

  In recent years, research on information media called electronic paper has been conducted. This medium encloses a display medium such as a microcapsule between opposing substrates and electrically switches the display. In addition to excellent characteristics such as low power consumption, bendable flexibility, thin and light, etc. Therefore, it has the outstanding feature of being rewritable and is entering the practical application stage.

  As a means for performing color display with the electronic paper described above, a method of coloring the display medium itself has been proposed. However, with this method, it is difficult to disperse the display medium particles uniformly and drive them stably, so that they have not been put into practical use.

  On the other hand, as another means, a method using a color filter in the same manner as a liquid crystal display is known (for example, see Patent Documents 1 to 3). However, an appropriate layer configuration of the entire electronic paper for obtaining good color display characteristics is not mentioned, and the design of a color filter member for electronic paper for obtaining good color display characteristics is not clear.

JP 2003-280044 A JP 2010-44337 A Special table 2010-503895 gazette

Since electronic paper can be produced by a continuous process using a long substrate, an advantage of excellent mass productivity is also expected. Therefore, a resin film is generally used as the base material of the color filter member for electronic paper. However, the resin film has the following problems.
First, various display methods are known as electronic paper, and a barrier function against moisture, oxygen, or the like is often required, but a resin film has a problem of low barrier properties. Therefore, attempts have been made to provide a barrier layer or attach a barrier film. However, since the barrier layer is usually formed under a reduced pressure atmosphere, a large facility is required, and the manufacturing cost is increased, and the manufacturing process is complicated. Moreover, the barrier film which is excellent in a barrier function has the difficulty that it is very expensive. On the other hand, a barrier function can be imparted by using a glass substrate, but sufficient flexibility as electronic paper cannot be obtained.
Next, when producing electronic paper using a color filter member for electronic paper, precise alignment is required. However, since a resin film is inferior in dimensional stability, misalignment occurs during manufacture and operation. There is a problem that arises.

  Moreover, when producing electronic paper using the color filter member for electronic paper, the method of bonding the color filter member for electronic paper, a display medium film, and a counter substrate is mentioned, for example, A color filter and a display medium There is also a problem that parallax occurs if there is a distance between the two.

  Patent Document 2 describes that flexibility is imparted by etching a glass substrate so that the thickness is reduced. For example, a color filter substrate in which a color filter is formed on a plastic substrate; An electronic paper is disclosed in which a TFT glass substrate in which TFTs are formed on a thin glass substrate, a display medium film, and a counter substrate are sequentially laminated. However, such electronic paper causes parallax by the thickness of the TFT glass substrate.

  The present invention has been made in view of the above problems, has flexibility and barrier properties, has good dimensional stability, hardly generates parallax when used in electronic paper, and has good color display. The main object of the present invention is to provide a color filter member for electronic paper capable of obtaining characteristics.

  In order to achieve the above object, the present invention comprises a glass substrate having flexibility, a color filter layer and a transparent electrode layer laminated in random order on one surface side of the glass substrate, and the color Provided is a color filter member for electronic paper, wherein a display medium layer of electronic paper is disposed on the filter layer and the transparent electrode layer side.

  According to the present invention, since it has a flexible glass substrate, it can have both flexibility and barrier properties, and when used in electronic paper, it protects the display medium layer of electronic paper from moisture, oxygen, and the like. be able to. Moreover, since the color filter member for electronic paper of the present invention is used with the display medium layer of electronic paper disposed on the color filter layer and transparent electrode layer side, the distance between the color filter layer and the display medium layer can be reduced. It is possible to make parallax less likely to occur. Furthermore, since the glass substrate is excellent in dimensional stability, it can be aligned accurately when producing electronic paper using the color filter member for electronic paper, and the position during manufacturing and operation Deviation can be suppressed. Therefore, by using the color filter member for electronic paper of the present invention, it is possible to obtain electronic paper having excellent color display characteristics. Further, according to the present invention, since a flexible glass substrate is used, a color filter member for electronic paper can be formed by a roll-to-roll method, and a highly productive color filter member for electronic paper is obtained. be able to.

  In the said invention, it is preferable that the said color filter layer or the said transparent electrode layer is directly formed on one surface of the said glass base material, and the said color filter layer and the said transparent electrode layer are laminated | stacked directly. By forming the color filter layer or the transparent electrode layer directly on one surface of the glass substrate, the dimensional stability of the color filter member for electronic paper can be improved, and the color filter for electronic paper of the present invention When the member is used for electronic paper, the displacement can be suppressed. Further, since the glass substrate has very little outgas, deterioration of the display medium layer of the electronic paper due to outgas can be suppressed. Furthermore, since the layer configuration of the color filter member for electronic paper can be simplified by adopting the above configuration, the electronic paper can be further reduced in thickness, and the optical characteristics of the electronic paper can be improved by reducing the number of layer interfaces. Can be improved.

  Moreover, in this invention, it is preferable that the optical function layer or the surface protective layer is formed in the other surface side of the said glass base material, and is arrange | positioned at the outermost surface. When the color filter member for electronic paper of the present invention is used for electronic paper, visibility can be improved by having an optical functional layer, and scratches and dirt on the surface of electronic paper can be prevented by having a surface protective layer. Because it can be done.

  Furthermore, in this invention, the touchscreen layer may be formed in the other surface side of the said glass base material. By having the touch panel layer, when the color filter member for electronic paper of the present invention is used for electronic paper, highly convenient electronic paper capable of inputting information can be obtained by directly touching the screen.

  In the present invention, the display medium layer may be formed on the color filter layer and the transparent electrode layer.

  The present invention also provides a glass substrate having flexibility, a color filter member for electronic paper having a color filter layer and a transparent electrode layer laminated in random order on one surface side of the glass substrate, and a counter substrate. A counter electrode substrate having a counter electrode layer formed on the counter substrate, the color filter layer and the transparent electrode layer of the color filter member for electronic paper, and the counter electrode layer of the counter electrode substrate. An electronic paper comprising a display medium layer disposed therebetween is provided.

  According to the present invention, since it has a color filter member for electronic paper including a glass substrate having flexibility, both flexibility and barrier properties can be achieved, and the display medium layer of electronic paper can be protected from moisture, oxygen, and the like. can do. Further, according to the present invention, since the glass substrate is provided outside the color filter layer, the distance between the color filter layer and the display medium layer is short, and parallax can be hardly generated. Furthermore, since the glass substrate is excellent in dimensional stability, it is possible to suppress misalignment between the color filter member for electronic paper, the display medium layer, and the counter electrode substrate during manufacture or operation. Therefore, it is possible to obtain excellent color display characteristics. Furthermore, according to the present invention, since the layer structure of the color filter member for electronic paper can be simplified, the electronic paper can be made thinner and the optical characteristics of the electronic paper can be improved by reducing the number of interface layers. It is possible to make it.

  Furthermore, the present invention provides a glass filter and a color filter layer laminated in random order on one surface side of the glass substrate using a roll-shaped glass substrate on which a flexible glass substrate is wound. And an electronic paper color filter member forming step of forming an electronic paper color filter member having a transparent electrode layer.

  According to the present invention, since a roll-shaped glass substrate is used, a color filter member for electronic paper that does not require high positional accuracy of each layer can be formed by a roll-to-roll method, and productivity can be improved. Is possible.

  In the said invention, in the said color filter member formation process for electronic paper, the said color filter layer or the said transparent electrode layer is directly on one surface of the said glass base material unwound from the said roll-shaped glass base material. Preferably, the color filter layer and the transparent electrode layer are directly laminated. Since the glass substrate has excellent dimensional stability, an electronic paper is produced using a color filter member for electronic paper by forming a color filter layer or a transparent electrode layer directly on one surface of the glass substrate. In doing so, alignment can be performed with high accuracy, and displacement during manufacturing and operation can be suppressed. In addition, since the glass substrate has very little outgas, deterioration of the display medium layer of the electronic paper due to outgas can be suppressed. Furthermore, with the above configuration, the layer configuration of the color filter member for electronic paper can be simplified, so that the thickness of the electronic paper can be reduced and the optical characteristics can be improved.

  Moreover, in the said invention, on the one surface of the said glass base material unwound from the said roll-shaped glass base material in the said color filter member formation process for electronic paper, the said color filter layer and the said transparent electrode layer At least one of them may be attached. This is because productivity can be further increased.

  Furthermore, in the present invention, the color filter member forming step for electronic paper includes aligning and bonding the touch panel layer under vacuum by a sheet-to-sheet method, or laminating the touch panel layer with alignment by a sheet-to-sheet method. It is preferable to have a touch panel layer stacking step. When the color filter member for electronic paper produced by the present invention has a touch panel layer, the touch panel layer needs alignment with the color filter layer, but alignment is adjusted by having the touch panel layer stacking step. A color filter member for electronic paper having a touch panel function and good color display characteristics when used for electronic paper can be obtained.

  In addition, the present invention provides an electronic paper color filter member forming step of forming an electronic paper color filter member having the above-described display medium layer by using a roll-shaped glass substrate on which a flexible glass substrate is wound. A color filter member for electronic paper, a counter substrate having a counter substrate and a counter electrode layer formed on the counter substrate, a display medium layer of the color filter member for electronic paper, and the counter electrode There is provided a method for producing an electronic paper comprising a bonding step of performing alignment bonding under vacuum by a sheet-to-sheet method so that the counter electrode layers of the substrate face each other.

  According to the present invention, a color filter member for electronic paper that does not require high positional accuracy of each layer is formed by a roll-to-roll method, and the color filter member for electronic paper that requires precise alignment, a counter electrode substrate, Is performed by vacuum alignment bonding using a sheet-to-sheet method, so that highly accurate alignment can be performed and productivity can be increased. Electronic paper with high accuracy and high productivity can be obtained. Moreover, the electronic paper excellent in the color display characteristic can be obtained by using the said color filter member for electronic paper.

  In the present invention, when used in electronic paper, there is an effect that good color display characteristics can be obtained.

It is a schematic sectional drawing which shows an example of the color filter member for electronic paper of this invention. It is a schematic sectional drawing which shows the other example of the color filter member for electronic paper of this invention. It is a schematic sectional drawing which shows the other example of the color filter member for electronic paper of this invention. It is a schematic sectional drawing which shows the other example of the color filter member for electronic paper of this invention. It is a schematic sectional drawing which shows the other example of the color filter member for electronic paper of this invention. It is a schematic sectional drawing which shows the other example of the color filter member for electronic paper of this invention. It is a schematic sectional drawing which shows the other example of the color filter member for electronic paper of this invention. It is a schematic sectional drawing which shows the other example of the color filter member for electronic paper of this invention. It is a schematic sectional drawing which shows the other example of the color filter member for electronic paper of this invention. It is a schematic sectional drawing which shows an example of the electronic paper of this invention. It is a schematic sectional drawing which shows an example of the counter electrode substrate in this invention.

  Hereinafter, the manufacturing method of the color filter member for electronic paper of this invention, electronic paper, the color filter member for electronic paper, and the manufacturing method of electronic paper are demonstrated in detail.

A. First, the color filter member for electronic paper of the present invention will be described. The color filter member for electronic paper of the present invention comprises a glass substrate having flexibility, a color filter layer and a transparent electrode layer laminated in random order on one surface side of the glass substrate, and the color filter A display medium layer of electronic paper is arranged and used on the layer and the transparent electrode layer side.

  The color filter layer and the transparent electrode layer are “formed on one surface side of the glass substrate” as well as the case where the color filter layer and the transparent electrode layer are directly formed on one surface of the glass substrate. It is a concept including the case where it forms on the surface of this through another layer. In addition, “the color filter layer and the transparent electrode layer are laminated” means not only the case where the color filter layer and the transparent electrode layer are laminated directly, but also the color filter layer and the transparent electrode layer through other layers. It is a concept including the case where it is laminated.

The color filter member for electronic paper of this invention is demonstrated referring drawings.
FIG. 1 is a schematic cross-sectional view showing an example of a color filter member for electronic paper according to the present invention. The color filter member 10 for electronic paper illustrated in FIG. 1 is formed on a glass substrate 1 and one surface of the glass substrate 1, and includes a plurality of colored layers (2R, 2G, 2B). And a transparent electrode layer 3 formed on the color filter layer 2. When the color filter member 10 for electronic paper shown in FIG. 1 is used for electronic paper, the display medium layer of electronic paper is arrange | positioned at the transparent electrode layer 3 side.

  FIG. 2 is a schematic sectional view showing another example of the color filter member for electronic paper of the present invention. The color filter member 10 for electronic paper illustrated in FIG. 2 is formed on the glass substrate 1, the transparent electrode layer 3 formed on one surface of the glass substrate 1, and the transparent electrode layer 3. And a color filter layer 2 including a colored layer (2R, 2G, 2B). When the color filter member 10 for electronic paper shown in FIG. 2 is used for electronic paper, the display medium layer of electronic paper is arrange | positioned at the color filter layer 2 side.

  According to the present invention, since it has a flexible glass substrate, it can have both flexibility and barrier properties, and when used in electronic paper, it protects the display medium layer of electronic paper from moisture, oxygen, and the like. be able to. Moreover, since the color filter member for electronic paper of this invention uses the display medium layer of electronic paper arrange | positioned at the color filter layer and the transparent electrode layer side, it can make it difficult to produce parallax with a display medium layer. Furthermore, since the glass substrate is excellent in dimensional stability, it can be aligned accurately when producing electronic paper using the color filter member for electronic paper, and the position during manufacturing and operation Deviation can be suppressed. Therefore, by using the color filter member for electronic paper of the present invention, it is possible to obtain electronic paper having excellent color display characteristics.

  Furthermore, according to the present invention, since a flexible glass substrate is used, a color filter member for electronic paper can be produced by a roll-to-roll method, and a highly productive color filter member for electronic paper is obtained. be able to. Furthermore, since it is not necessary to form a barrier layer or attach a barrier film, it is possible to produce a color filter member for electronic paper by a simple method and to reduce manufacturing costs.

  Moreover, since a glass substrate has the advantage of being excellent in light transmittance, durability, weather resistance, heat resistance, low outgas, and the like, it is suitable as a substrate for a color filter member for electronic paper.

  Hereinafter, each structure in the color filter member for electronic paper of this invention is demonstrated.

1. Glass substrate The glass substrate used in the present invention has flexibility and supports the color filter layer and the transparent electrode layer. The glass substrate protects the display medium layer of the electronic paper from moisture, oxygen and the like when the electronic paper color filter member of the present invention is used in the electronic paper.

  “The glass substrate has flexibility” means that the glass substrate is not broken or chipped by visual confirmation after the glass substrate is wound once on an ABS resin rod having a diameter of 85 mm. Refers to that.

  The glass substrate is not particularly limited as long as it has flexibility and light transmittance, and various glass substrates can be used.

The glass substrate preferably has a transmittance in the visible light region of 80% or more, and more preferably 90% or more. This is because, when the transmittance is in the above range, when the color filter member for electronic paper of the present invention is used for electronic paper, it is possible to prevent a decrease in display luminance.
Here, the transmittance of the glass substrate can be measured by JIS K7361-1 (a test method for the total light transmittance of plastic-transparent material).

  Examples of such a glass substrate include glass substrates such as soda lime glass, non-alkali glass, and quartz glass. Among these, non-alkali glass is preferable.

  The thickness of the glass substrate is not particularly limited as long as it exhibits a flexibility and a barrier property, and may be appropriately adjusted according to the use of the color filter member for electronic paper of the present invention. Specifically, the thickness of the glass substrate is preferably 150 μm or less, more preferably in the range of 20 μm to 120 μm, and particularly preferably in the range of 50 μm to 100 μm. If the thickness of the glass substrate is too thin, the barrier properties and strength may be impaired. If the thickness of the glass substrate is too thick, flexibility may not be obtained, and thinning of the electronic paper may be difficult. Because there is.

2. Color filter layer The color filter layer used for this invention is formed in the one surface side of a glass base material, and is provided with a some colored layer.
Note that “formed on one surface side of the glass substrate” means not only when it is directly formed on one surface of the glass substrate, but also with another layer on one surface of the glass substrate. It is a concept including the case where it forms through.

As the formation position of the color filter layer, it is only necessary that the color filter layer and the transparent electrode layer are laminated in random order on one surface side of the glass substrate, and the lamination order of the color filter layer and the transparent electrode layer is particularly limited. It may be the order of the glass substrate 1, the color filter layer 2, and the transparent electrode layer 3 as illustrated in FIG. 1, and the glass substrate 1, the transparent electrode layer 3, as illustrated in FIG. The order of the color filter layer 2 may be sufficient. When the glass substrate, the color filter layer, and the transparent electrode layer are laminated in this order, the transparent electrode layer and the display medium layer of the electronic paper are close to each other. Can be set low, and power consumption can be reduced. On the other hand, when the glass substrate, the transparent electrode layer, and the color filter layer are laminated in this order, the color filter layer and the display medium layer of the electronic paper are close to each other, resulting in parallax when used for electronic paper. Can be difficult. Therefore, in any case, the display characteristics of the electronic paper can be improved.
Especially, when a color filter layer and a transparent electrode layer are laminated | stacked through another layer, it is preferable to laminate | stack in order of a glass base material, a color filter layer, and a transparent electrode layer. This is because if the positions of the transparent electrode layer and the display medium layer of the electronic paper are far, it is difficult to drive the electronic paper.

  The plurality of colored layers constituting the color filter layer are not particularly limited as long as a desired color can be developed when the electronic paper is produced using the color filter member for electronic paper of the present invention. A colored layer of each color used in a general color filter can be used. Usually, a plurality of colored layers composed of three colors of red (R), green (G), and blue (B) are used.

  The plurality of colored layers are usually formed in a pattern so that a plurality of colors are regularly arranged, but the pattern is not particularly limited, and the use of the color filter member for electronic paper of the present invention, etc. It can be selected as appropriate according to the conditions. Examples of such a pattern include a stripe type, a mosaic type, a triangle type, and a 4-pixel arrangement type. Moreover, the area of each colored layer is not specifically limited at this time, It adjusts suitably according to the resolution etc. of the electronic paper manufactured using the color filter member for electronic paper of this invention.

  The material of the colored layer can be the same as that used for the colored layer of a general color filter, and the description thereof is omitted here.

  The film thickness of the colored layer is not particularly limited as long as a good image display can be performed when the color filter member for electronic paper of the present invention is used in electronic paper. It can be set within the range of 5 μm to 3.0 μm.

  The method for forming the colored layer is not particularly limited as long as the colored layer having a desired thickness can be formed without color mixing. As such a method, generally known methods such as a photolithography method and an ink jet method can be used.

  The color filter layer should just have a colored layer at least, and may have structures other than a colored layer as needed. Such other configurations are not particularly limited, and those having an arbitrary function can be used according to the use of the color filter member for electronic paper of the present invention. Examples of such other configurations include a light-shielding portion formed between the colored layers to partition the pixels, an overcoat layer provided to protect the colored layer and flatten the surface of the color filter layer, and the like. be able to. Note that the light-shielding portion and the overcoat layer can be the same as those used in a general color filter, and thus description thereof is omitted here.

  The color filter layer 2 may be formed alone on one surface side of the glass substrate 1 as illustrated in FIGS. 1 and 2, and the color filter layer substrate 12 as illustrated in FIG. 3. You may form as a color filter layer laminated body in which the color filter layer 2 was formed on it. In FIG. 3, the color filter layer laminate is bonded with the adhesive layer 4 formed on the color filter layer substrate 12. Reference numerals not described in FIG. 3 are the same as those in FIG.

  Especially, it is preferable that the color filter layer is independently formed in the one surface side of the glass base material. This is because the layer configuration of the color filter member for electronic paper can be simplified, so that the electronic paper can be further thinned and the optical characteristics of the electronic paper can be improved by reducing the number of layer interfaces.

In particular, as illustrated in FIGS. 1 and 2, the color filter layer 2 or the transparent electrode layer 3 is directly formed on one surface of the glass substrate 1, and the color filter layer 2 and the transparent electrode layer 3 are directly formed. It is preferable that they are laminated.
Since the glass substrate is excellent in dimensional stability, the color filter layer or transparent electrode layer is formed directly on one surface of the glass substrate, which helps to prevent misalignment during manufacturing and operation. Can be suppressed. Further, since the glass substrate has very little outgas, deterioration of the display medium layer of the electronic paper due to outgas can be suppressed. Moreover, since the glass substrate is excellent in durability, weather resistance, and heat resistance, reliability can be improved. Furthermore, since the glass substrate is excellent in light transmittance, high luminance can be realized when used for electronic paper. In addition, since the layer configuration of the color filter member for electronic paper can be simplified by adopting the above configuration, the electronic paper can be further reduced in thickness and the optical characteristics of the electronic paper can be improved by reducing the number of layer interfaces. Can be made.

  When the color filter layer is formed as a color filter layer laminate on one surface side of the glass substrate, in the color filter layer laminate, the color filter layer may be disposed on the glass substrate side. The layer substrate may be disposed on the glass substrate side.

  The color filter layer substrate is not particularly limited as long as it has optical transparency, and the same transparent substrate used for general color filters can be used.

The color filter layer substrate preferably has a transmittance in the visible light region of 80% or more, and more preferably 90% or more. This is because, when the transmittance is in the above range, when the color filter member for electronic paper of the present invention is used for electronic paper, it is possible to prevent a decrease in display luminance.
The method for measuring the transmittance of the color filter layer substrate is the same as the method for measuring the transmittance of the glass substrate.

  Such a color filter layer substrate may be a transparent substrate having no flexibility such as a glass substrate, or may be a transparent substrate having flexibility such as a resin film. Good. Among these, a flexible base material is preferably used. It is because the color filter member for electronic paper of the present invention can be manufactured by a roll-to-roll method by using a flexible substrate. Examples of the resin film include polyethylene terephthalate (PET), polyethylene naphthalate (PEN), polyethersulfone (PES), polyimide (PI), polyetheretherketone (PEEK), polycarbonate (PC), polyethylene (PE ), Polypropylene (PP), polyphenylene sulfide (PPS), polyetherimide (PEI), cellulose triacetate (CTA), cyclic polyolefin (COP), polymethyl methacrylate (PMMA), polysulfone (PSF), polyamideimide (PAI), etc. The film which consists of can be mentioned.

  The thickness of the color filter layer substrate is not particularly limited as long as the color filter layer can be supported, but is preferably in the range of 10 μm to 500 μm. This is because if the color filter layer base material is too thin, the strength may decrease, and if the color filter layer base material is too thick, it may be difficult to make the electronic paper thinner.

  Further, the color filter layer laminate is usually bonded by forming an adhesive layer made of an adhesive material. The adhesive layer may be formed on the color filter layer side of the color filter layer laminate, or may be formed on the color filter layer substrate side.

As the adhesive material, any adhesive material can be used as long as it can be bonded with a desired strength and has optical transparency. For example, a polycarbonate resin, a polyolefin resin, an acrylic resin, a urethane resin, a silicone resin, Examples thereof include polyester resins and epoxy resins, and among them, acrylic resins are preferable.
Further, the thickness of the pressure-sensitive adhesive layer is not particularly limited as long as it can be bonded so that the color filter layer laminate is not peeled off. Specifically, it can be set within a range of 5 μm to 50 μm. .

3. Transparent electrode layer The transparent electrode layer used for this invention is formed in the one surface side of a glass base material.
Note that “formed on one surface side of the glass substrate” means not only when it is directly formed on one surface of the glass substrate, but also with another layer on one surface of the glass substrate. It is a concept including the case where it forms through.

  As the formation position of the transparent electrode layer, it is only necessary that the color filter layer and the transparent electrode layer are laminated in any order on one surface side of the glass substrate, and the lamination order of the color filter layer and the transparent electrode layer is particularly limited. Instead, it is as described in the section of the color filter layer.

  The material of the transparent electrode layer is not particularly limited as long as it is a conductive material capable of forming a transparent electrode. For example, indium tin oxide (ITO), indium zinc oxide (IZO), tin oxide, oxidation Conductive oxides such as zinc, indium oxide and aluminum zinc oxide (AZO), metals such as Au and Ni, conductive polymers such as polyaniline, polyacetylene, polyalkylthiophene derivatives, polysilane derivatives, etc. can be used. Among these, ITO is preferably used.

  Although it will not specifically limit if it can function as a transparent electrode layer as a thickness of a transparent electrode layer, It is preferable to exist in the range of 15 nm-200 nm. If the thickness of the transparent electrode layer is less than the above range, it is difficult to form the transparent electrode layer with a uniform thickness. If the thickness of the transparent electrode layer exceeds the above range, This is because the manufacturing cost increases because the time and materials used for film formation increase.

  The method for forming the transparent electrode layer is not particularly limited as long as the transparent electrode layer can be formed with a desired thickness. As a method for forming such a transparent electrode layer, a general electrode film forming method can be used. For example, a PVD method such as a vacuum deposition method, a sputtering method, an ion plating method, a CVD method, a conductive paste The method of apply | coating is mentioned. Moreover, the transparent electrode layer may be formed in one surface on the one surface side of the glass base material, and may be formed in pattern shape.

  The transparent electrode layer 3 may be formed alone on one surface side of the glass substrate 1 as illustrated in FIGS. 1 and 2, and the transparent electrode layer substrate 13 as illustrated in FIG. 4. You may form as a transparent electrode layer laminated body in which the transparent electrode layer 3 was formed on it. In FIG. 4, the transparent electrode layer laminate is bonded with the adhesive layer 4 formed on the transparent electrode layer base material 13. A display medium layer 9 is formed on the transparent electrode layer 3. Reference numerals not described in FIG. 4 are the same as those in FIG.

  Especially, it is preferable that the transparent electrode layer is independently formed in the one surface side of the glass base material. This is because the layer configuration of the color filter member for electronic paper can be simplified, so that the electronic paper can be further thinned and the optical characteristics of the electronic paper can be improved by reducing the number of layer interfaces.

  In particular, as described in the section of the color filter layer, as illustrated in FIGS. 1 and 2, the color filter layer 2 or the transparent electrode layer 3 is directly formed on one surface of the glass substrate 1, and The color filter layer 2 and the transparent electrode layer 3 are preferably laminated directly.

  When the transparent electrode layer is formed as a transparent electrode layer laminate on one surface side of the glass substrate, in the transparent electrode layer laminate, the transparent electrode layer may be disposed on the glass substrate side. The layer substrate may be disposed on the glass substrate side.

  As the transparent electrode layer base material, the same material as the color filter layer base material can be used. The thickness of the transparent electrode layer base material is not particularly limited as long as the transparent electrode layer can be supported, but is preferably in the range of 10 μm to 500 μm.

  In addition, the transparent electrode layer laminate is usually bonded by forming an adhesive layer made of an adhesive material. The adhesive layer may be formed on the transparent electrode layer side of the transparent electrode layer laminate, or may be formed on the transparent electrode layer substrate side. As the adhesive material, the same adhesive material as that described in the above section of the color filter layer can be used. The thickness of the pressure-sensitive adhesive layer is not particularly limited as long as the transparent electrode layer laminate can be bonded so as not to peel off, and is the same as the thickness of the pressure-sensitive adhesive layer described in the above section of the color filter layer. .

4). Other Configurations The color filter member for electronic paper of the present invention only needs to have at least a glass substrate, a color filter layer, and a transparent electrode layer, and a necessary configuration can be appropriately added. Hereinafter, such a configuration will be specifically described.

(1) Optical functional layer In this invention, it is preferable that the optical functional layer is formed in the other surface side of the said glass base material, and is arrange | positioned at the outermost surface. This is because by having the optical functional layer, when the color filter member for electronic paper of the present invention is used for electronic paper, the visibility can be improved. The optical functional layer may also serve as a surface protective layer described later.
Note that “formed on the other surface side of the glass substrate” is not only directly formed on the other surface of the glass substrate, but also other layers on the other surface of the glass substrate. It is a concept including the case where it forms through.

  Fig.5 (a) is a schematic sectional drawing which shows an example of the color filter member for electronic paper of this invention which has an optical function layer. In the example shown in FIG. 5A, the optical functional layer 5, the glass substrate 1, the color filter layer 2, and the transparent electrode layer 3 are laminated in this order. When the color filter member 10 for electronic paper shown to Fig.5 (a) is used for electronic paper, the display medium layer of electronic paper is arrange | positioned at the transparent electrode layer 3 side.

  The optical functional layer 5 may be formed alone on the other surface side of the glass substrate 1 as shown in FIG. 5 (a), or as shown in FIG. 5 (b). 15 may be formed as an optical functional layer laminate in which the optical functional layer 5 is formed. In FIG. 5B, the optical functional layer laminate is bonded with the adhesive layer 4 formed on the optical functional layer substrate 15. 5A and 5B, the order of stacking the color filter layer 2 and the transparent electrode layer 3 may be reversed. Reference numerals not described in FIGS. 5A and 5B are the same as those in FIG.

  When the optical functional layer is formed as an optical functional layer laminate on one surface side of the glass substrate, the optical functional layer substrate is usually disposed on the glass substrate side in the optical functional layer laminate.

  As the optical functional layer base material, the same one as the above-mentioned color filter layer base material can be used. The thickness of the optical functional layer base material is not particularly limited as long as the optical functional layer can be supported, but is preferably in the range of 10 μm to 500 μm.

  The optical functional layer laminate is usually bonded by forming an adhesive layer made of an adhesive material on the optical functional layer substrate side. As the adhesive material, the same adhesive material as that described in the above section of the color filter layer can be used. The thickness of the pressure-sensitive adhesive layer is not particularly limited as long as it can be bonded so that the optical functional layer laminate is not peeled off, and is the same as the thickness of the pressure-sensitive adhesive layer described in the above section of the color filter layer. .

  The formation position of the optical functional layer is not particularly limited as long as the optical functional layer is formed on the other surface side of the glass substrate and disposed on the outermost surface. When the optical functional layer is formed as an optical functional layer laminate on one surface side of the glass substrate, the optical functional layer is usually disposed on the outermost surface.

  Examples of the optical functional layer include an antiglare layer, an antireflection layer, a low reflection layer, and a peep prevention layer. Among them, an antiglare layer and an antireflection layer are preferable. Hereinafter, the antiglare layer and the antireflection layer will be described.

(I) Antiglare layer (antiglare layer)
The antiglare layer used in the present invention has antiglare properties. For example, the antiglare layer has irregularities on the surface or has internal scattering properties, thereby exhibiting antiglare properties and improving bright place contrast. Moreover, when the color filter member for electronic paper of this invention is used for electronic paper by having an anti-glare layer, generation | occurrence | production of glare etc. can be suppressed. As such an anti-glare layer, a known anti-glare layer can be used. For example, it can be the same as that described in JP 2010-44311 A, etc. Omitted.
The average film thickness of the antiglare layer is preferably in the range of 1 μm to 10 μm.

(Ii) Antireflection layer (anti-reflection layer)
When the color filter member for electronic paper of the present invention is used in electronic paper, the antireflection layer used in the present invention is reflected in the background due to specular reflection of extraneous light on the electronic paper surface, image whitening and image It has a function of preventing a decrease in contrast. As such an antireflection layer, a known antireflection layer can be used. For example, it can be the same as that described in JP-A-2008-249882 and the like. Omitted.

(2) Surface protective layer In this invention, it is also preferable that the surface protective layer is formed in the other surface side of the said glass base material, and is arrange | positioned at the outermost surface. By having the surface protective layer, when the color filter member for electronic paper of the present invention is used for electronic paper, scratches and dirt on the surface of the electronic paper can be prevented. The surface protective layer may also serve as the optical functional layer described above.
Note that “formed on the other surface side of the glass substrate” is not only directly formed on the other surface of the glass substrate, but also other layers on the other surface of the glass substrate. It is a concept including the case where it forms through.

  Fig.6 (a) is a schematic sectional drawing which shows an example of the color filter member for electronic paper of this invention which has a surface protective layer. In FIG. 6A, the surface protective layer 6, the glass substrate 1, the color filter layer 2, and the transparent electrode layer 3 are laminated in this order. When the color filter member 10 for electronic paper shown to Fig.6 (a) is used for electronic paper, the display medium layer of electronic paper is arrange | positioned at the transparent electrode layer 3 side.

  The surface protective layer 6 may be formed alone on the other surface side of the glass substrate 1 as shown in FIG. 6 (a), or as shown in FIG. 6 (b). 16 may be formed as a surface protective layer laminate in which the surface protective layer 6 is formed. In FIG. 6B, the surface protective layer laminate is bonded with the adhesive layer 4 formed on the surface protective layer substrate 16. 6A and 6B, the order of stacking the color filter layer 2 and the transparent electrode layer 3 may be reversed. Reference numerals not described in FIGS. 6A and 6B are the same as those in FIG.

  When the surface protective layer is formed as a surface protective layer laminate on one surface side of the glass substrate, in the surface protective layer laminate, the surface protective layer substrate is usually disposed on the glass substrate side.

  As the surface protective layer substrate, the same material as the above-mentioned color filter layer substrate can be used. The thickness of the surface protective layer substrate is not particularly limited as long as the surface protective layer can be supported, and specifically, it is preferably in the range of 10 μm to 500 μm.

  The surface protective layer laminate is usually bonded by forming an adhesive layer made of an adhesive material on the surface protective layer substrate side. As the adhesive material, the same adhesive material as that described in the above section of the color filter layer can be used. The thickness of the pressure-sensitive adhesive layer is not particularly limited as long as it can be bonded so that the surface protective layer laminate is not peeled off, and is the same as the thickness of the pressure-sensitive adhesive layer described in the above section of the color filter layer. .

  The formation position of the surface protective layer is not particularly limited as long as the surface protective layer is formed on the other surface side of the glass substrate and disposed on the outermost surface. When the surface protective layer is formed as a surface protective layer laminate on one surface side of the glass substrate, the surface protective layer is usually disposed on the outermost surface.

  Examples of the surface protective layer used in the present invention include a hard coat layer, an antifouling layer, an antistatic layer, an antibacterial layer and the like, and among them, a hard coat layer and an antifouling layer are preferable. Hereinafter, the hard coat layer and the antifouling layer will be described.

(I) Hard coat layer The hard coat layer used in the present invention is a layer having a function of imparting scratch resistance to the color filter member for electronic paper of the present invention. As such a hard coat layer, a known hard coat layer can be used. For example, the hard coat layer can be the same as that described in JP 2010-44311 A and the like. Omitted.
The “hard coat layer” refers to a layer having a hardness of “H” or higher in a pencil hardness test generally defined by JIS 5600-5-4 (1999). Especially, it is preferable that the hardness of the hard-coat layer surface is "3H" or more.

(Ii) Antifouling layer The antifouling layer used in the present invention is a layer provided to prevent dust and dirt from adhering or to facilitate removal even if dust adheres. In the present invention, a known antifouling layer can be used.

  The antifouling layer can be formed by applying a very thin antifouling agent and drying it. Examples of the antifouling agent include a surfactant such as a fluorine-based surfactant, a paint containing a fluorine-based resin, a release agent such as silicone oil, or a wax.

  In the present invention, the antifouling layer may be provided separately from the hard coat layer, but may be formed as an antifouling layer by adding the antifouling agent to the hard coat layer. Among these, since the cost can be reduced, it is preferable to add an antifouling agent to the hard coat layer to form an antifouling layer.

  The film thickness of the antifouling layer is preferably in the range of 1 nm to 30 nm. It is because there exists a possibility that an optical influence may arise when the film thickness of a pollution protection layer exceeds the said range.

(3) Touch panel layer In this invention, the touch panel layer may be formed in the other surface side of the said glass base material. By having the touch panel layer, when the color filter member for electronic paper of the present invention is used for electronic paper, highly convenient electronic paper capable of inputting information can be obtained by directly touching the screen.
Note that “formed on the other surface side of the glass substrate” is not only directly formed on the other surface of the glass substrate, but also other layers on the other surface of the glass substrate. It is a concept including the case where it forms through.

  FIG. 7 is a schematic cross-sectional view showing an example of the color filter member for electronic paper of the present invention having a touch panel layer. In FIG. 7, the optical functional layer 5 (or the surface protective layer 6), the optical functional layer substrate 15 (or the surface protective layer substrate 16), the adhesive layer 4, the touch panel layer 7, the adhesive layer 4, the glass substrate 1, The color filter layer 2 and the transparent electrode layer 3 are laminated in this order. When the color filter member 10 for electronic paper shown in FIG. 7 is used for electronic paper, the display medium layer of electronic paper is arrange | positioned at the transparent electrode layer 3 side. The outermost surface of the electronic paper color filter member 10 illustrated in FIG. 7 may be the optical functional layer 5 or the surface protective layer 6. In FIG. 7, the order in which the color filter layer 2 and the transparent electrode layer 3 are stacked may be reversed. Reference numerals not described in FIG. 7 are the same as those in FIG.

  The touch panel layer is usually bonded using an adhesive layer made of an adhesive material. The adhesive layer may be formed on one side of the touch panel layer or may be formed on both sides. As the adhesive material, the same adhesive material as that described in the above section of the color filter layer can be used. The thickness of the pressure-sensitive adhesive layer is not particularly limited as long as it can be bonded so that the touch panel layer is not peeled off, and is the same as the thickness of the pressure-sensitive adhesive layer described in the above section of the color filter layer.

As the touch panel layer, various methods such as a resistive film method, a capacitance method, an optical method, an electromagnetic induction method, and an ultrasonic method can be used.
A resistive film type touch panel has a structure in which electrode surfaces formed on a substrate maintain a gap and face each other. When the finger or pen is pressed, the substrate is deformed and the electrodes come into contact. An input point is detected by applying a voltage and reading the potential gradient of the contact portion. The configuration of the resistive film type touch panel layer can be the same as that described in, for example, Japanese Patent Application Laid-Open No. 2003-307723, and the description thereof is omitted here.
The capacitive touch panel is a method of detecting an input point by utilizing a change in capacitance when a conductor such as a finger touches the panel. Among them, the projection type has an electrode structure patterned in a matrix with a dielectric interposed therebetween, and an input point is detected from a voltage change caused by the electric capacitance of each electrode. The configuration of the capacitive touch panel layer can be the same as that described in, for example, JP-T-2003-511799, and the description thereof is omitted here.

  The position of the touch panel layer is not particularly limited as long as the touch panel layer is formed on the other surface side of the glass substrate, but the color filter member for electronic paper of the present invention is an optical functional layer and surface protection. When it has at least one of the layers, the touch panel layer is disposed closer to the glass substrate than these layers.

(4) Display medium layer In this invention, the display medium layer may be formed on the said color filter layer and the said transparent electrode layer.
In addition, “formed on the color filter layer and the transparent electrode layer” means not only a case where it is directly formed on the laminate of the color filter layer and the transparent electrode layer but also a laminate of the color filter layer and the transparent electrode layer. It is a concept including the case where it forms through another layer.

The display medium layer used in the present invention is appropriately selected according to the electronic paper display method in which the electronic paper color filter member of the present invention is used.
As a display method of electronic paper, known ones can be applied, for example, electrophoresis method, twist ball method, powder movement method (electronic powder fluid method, charged toner type method), liquid crystal display method, thermal method. (Coloring method, light scattering method), electrochromic method, electrowetting method, magnetophoresis method and the like. Among these, the electrophoresis method is preferably used. This is because this method is in a practical stage and is a particle movement type, and thus it is possible to obtain an electronic paper that is less dependent on viewing angle and excellent in responsiveness.

The electrophoresis method uses an electrophoresis phenomenon in which charged particles dispersed in a solvent move between electrodes by an electric field. Examples of the electrophoresis method include a microcapsule method and a microcup method.
In the microcapsule method, charged white particles and black particles and a transparent dispersion medium in which these particles are dispersed are enclosed in a microcapsule made of a transparent resin, and an electric field is applied to move the white particles and black particles up and down. To express black and white display or gradation.
In the microcup method, a dispersion medium colored with a dye and charged white particles are placed in cells partitioned by cup-shaped depressions (microcups), and white particles are moved up and down by applying an electric field. To display white or the color of the dispersion medium.

  The configuration, material, and formation method of the display medium layer used in the present invention can be the same as those used for general electronic paper of each display method.

  Hereinafter, a display medium layer in the case where the color filter member for electronic paper of the present invention is used for microcapsule type electronic paper will be described as an example. As such a display medium layer, for example, a microcapsule in which a dispersion liquid composed of white particles, black particles, and a transparent dispersion medium is fixed with a binder resin can be used.

  Examples of the transparent dispersion medium include alcohol solvents, various esters, ketones, aliphatic hydrocarbons, alicyclic hydrocarbons, aromatic hydrocarbons, halogenated hydrocarbons, carboxylates, and other various oils. Or a mixture of these with a surfactant or the like can be used.

As the white particles, for example, white pigments such as titanium dioxide, zinc white, and antimony trioxide can be used. As the black particles, for example, black pigments such as aniline black, carbon black, and titanium black can be used. .
Further, if necessary, these pigments may be charged with electrolytes, surfactants, metal soaps, resins, rubbers, oils, varnishes, compound charge control agents, titanium-based coupling agents, aluminum-based coupling agents, A dispersant such as a silane coupling agent, a lubricant, a stabilizer and the like may be added.

  As a material for forming the wall film of the microcapsule, for example, a compound such as a gum arabic / gelatin composite film, a urethane resin, a urea resin, or a urea resin can be used.

  As the binder resin, those having good affinity for the wall film of the microcapsule, excellent adhesion to the transparent electrode layer, and insulating properties can be used. For example, polyethylene, chlorinated polyethylene, ethylene-acetic acid can be used. A vinyl copolymer, a silicone resin, etc. can be mentioned.

  Such a display medium layer can be formed, for example, by applying an ink obtained by dispersing microcapsules in a binder resin on the transparent electrode layer.

The display medium layer may be formed alone on the color filter layer and the transparent electrode layer, or is formed as a display medium layer laminate in which the display medium layer is formed on the display medium layer base material. May be.
When the display medium layer is formed as a display medium layer laminate on the color filter layer and the transparent electrode layer, the display medium layer may be arranged on the color filter layer and transparent electrode layer side in the display medium layer laminate. The display medium layer base material may be disposed on the color filter layer and transparent electrode layer side.
As the display medium layer substrate, the same material as the above-described color filter layer substrate can be used. The thickness of the display medium layer base material is not particularly limited as long as the display medium layer can be supported, but is preferably in the range of 10 μm to 500 μm.
The display medium layer laminate is usually bonded by forming an adhesive layer made of an adhesive material on the display medium layer substrate side. As the adhesive material, the same adhesive material as that described in the above section of the color filter layer can be used. The thickness of the pressure-sensitive adhesive layer is not particularly limited as long as it can be bonded so that the display medium layer laminate does not peel off, and is the same as the thickness of the pressure-sensitive adhesive layer described in the above section of the color filter layer. .

  The formation position of the display medium layer is not particularly limited as long as the display medium layer is formed on the color filter layer and the transparent electrode layer.

5. Layer structure of color filter member for electronic paper Examples of the layer structure of the color filter member for electronic paper of the present invention include the following.
Glass substrate 1 / color filter layer 2 / transparent electrode layer 3 (see FIG. 1)
Glass substrate 1 / transparent electrode layer 3 / color filter layer 2 (see FIG. 2)
Glass substrate 1 / adhesive layer 4 / color filter layer substrate 12 / color filter layer 2 / transparent electrode layer 3 (see FIG. 3)
Glass substrate / adhesive layer / transparent electrode layer substrate / transparent electrode layer / color filter layer (not shown)
Glass substrate 1 / color filter layer 2 / adhesive layer 4 / transparent electrode layer substrate 13 / transparent electrode layer 3 / display medium layer 9 (see FIG. 4)
Glass substrate / color filter layer / adhesive layer / transparent electrode layer / transparent electrode layer substrate / display medium layer (not shown)
Glass substrate 1 / adhesive layer 4 / color filter layer substrate 12 / color filter layer 2 / adhesive layer 4 / transparent electrode layer substrate 13 / transparent electrode layer 3 / display medium layer 9 (see FIG. 8)
Glass substrate / adhesive layer / color filter layer substrate / color filter layer / adhesive layer / transparent electrode layer / transparent electrode layer substrate / display medium layer (not shown)
In the above-described layer configuration, an adhesive layer may be formed on the outermost surface on one surface side of the glass substrate (the side on which the display medium layer of electronic paper is disposed or the display medium layer side).
Glass substrate 1 / color filter layer 2 / transparent electrode layer 3 / display medium layer 9 / adhesive layer 4 (see FIG. 9 (a))
Glass substrate 1 / transparent electrode layer 3 / color filter layer 2 / display medium layer 9 / adhesive layer 4 (see FIG. 9B)

When the color filter member for electronic paper of the present invention has an optical functional layer, examples of the layer configuration of the color filter member for electronic paper include the following.
Optical function layer 5 / glass substrate 1 / color filter layer 2 / transparent electrode layer 3 (see FIG. 5 (a))
Optical function layer 5 / optical function layer base material 15 / adhesive layer 4 / glass base material 1 / color filter layer 2 / transparent electrode layer 3 (see FIG. 5B)
Optical function layer / glass substrate / transparent electrode layer / color filter layer Optical function layer / optical function layer substrate / adhesive layer / glass substrate / transparent electrode layer / color filter layer Optical function layer / glass substrate / Adhesive layer / color filter layer substrate / color filter layer / transparent electrode layer Optical functional layer / optical functional layer substrate / adhesive layer / glass substrate / adhesive layer / color filter layer substrate / color filter layer / transparent electrode layer・ Optical functional layer / Glass substrate / Adhesive layer / Transparent electrode layer substrate / Transparent electrode layer / Color filter layer ・ Optical functional layer / Optical functional layer substrate / Adhesive layer / Glass substrate / Adhesive layer / Transparent electrode layer base Material / Transparent electrode layer / Color filter layer Optical function layer / Glass substrate / Color filter layer / Adhesive layer / Transparent electrode layer substrate / Transparent electrode layer / Display medium layer Optical function layer / Glass substrate / Color filter layer / Adhesive layer / Transparent electrode layer / Transparent Electrode layer substrate / display medium layer Optical function layer / Optical function layer substrate / Adhesive layer / Glass substrate / Color filter layer / Adhesive layer / Transparent electrode layer substrate / Transparent electrode layer / Display medium layer Optical function layer / Optical functional layer substrate / Adhesive layer / Glass substrate / Color filter layer / Adhesive layer / Transparent electrode layer / Transparent electrode layer substrate / Display medium layer Optical functional layer / Glass substrate / Adhesive layer / Color filter layer base Material / Color filter layer / Adhesive layer / Transparent electrode layer substrate / Transparent electrode layer / Display medium layer Optical function layer / Glass substrate / Adhesive layer / Color filter layer substrate / Color filter layer / Adhesive layer / Transparent electrode layer / Transparent electrode layer substrate / Display medium layer-Optical functional layer / Optical functional layer substrate / Adhesive layer / Glass substrate / Adhesive layer / Color filter layer substrate / Color filter layer / Adhesive layer / Transparent electrode layer substrate / Transparent electrode layer / display medium layer Optical functional layer / optical functional layer substrate Adhesive layer / glass substrate / adhesive layer / color filter layer substrate / color filter layer / adhesive layer / transparent electrode layer / transparent electrode layer substrate / display medium layer In the above-mentioned layer configuration, one surface side of the glass substrate An adhesive layer may be formed on the outermost surface (the side where the display medium layer of electronic paper is disposed or the display medium layer side).
Optical function layer / glass substrate / color filter layer / transparent electrode layer / display medium layer / adhesive layer Optical function layer / optical function layer substrate / adhesive layer / glass substrate / color filter layer / transparent electrode layer / display Medium layer / Adhesive layer Optical function layer / Glass substrate / Transparent electrode layer / Color filter layer / Display medium layer / Adhesion layer Optical function layer / Optical function layer substrate / Adhesion layer / Glass substrate / Transparent electrode layer / Color filter layer / Display medium layer / Adhesive layer

  The layer structure of the color filter member for electronic paper when the color filter member for electronic paper of the present invention has a surface protective layer may be exemplified by replacing the optical functional layer with the surface protective layer in the above-described layer configuration. it can.

  When the color filter member for electronic paper of the present invention has a touch panel layer, the layer configuration of the color filter member for electronic paper is the optical layer / optical functional layer substrate in the above-described layer configuration. / It can be exemplified by arranging between the adhesive layer and the glass substrate.

As described above, the color filter member for electronic paper of the present invention can adopt various layer configurations. In particular, as described in the section of the color filter layer, the color filter layer or the transparent electrode layer is directly formed on one surface of the glass substrate, and the color filter layer and the transparent electrode layer are directly laminated. It is preferable. Examples of the preferred layer structure include the following.
Glass substrate 1 / color filter layer 2 / transparent electrode layer 3 / display medium layer 9 / adhesive layer 4 (see FIG. 9 (a))
Glass substrate 1 / transparent electrode layer 3 / color filter layer 2 / display medium layer 9 / adhesive layer 4 (see FIG. 9B)
Optical function layer / glass substrate / color filter layer / transparent electrode layer / display medium layer / adhesive layer Optical function layer / glass substrate / transparent electrode layer / color filter layer / display medium layer / adhesive layer Surface protective layer / Glass substrate / Color filter layer / Transparent electrode layer / Display medium layer / Adhesive layer Surface protective layer / Glass substrate / Transparent electrode layer / Color filter layer / Display medium layer / Adhesive layer

B. Next, the electronic paper of the present invention will be described. The electronic paper of the present invention is opposed to a glass substrate having flexibility, and a color filter member for electronic paper having a color filter layer and a transparent electrode layer laminated in random order on one surface side of the glass substrate. A counter electrode substrate having a base material and a counter electrode layer formed on the counter base material, the color filter layer and the transparent electrode layer of the color filter member for electronic paper, and the counter electrode of the counter electrode substrate And a display medium layer disposed between the layers.

The electronic paper of the present invention will be described with reference to the drawings. FIG. 10 is a schematic cross-sectional view showing an example of the electronic paper of the present invention. An electronic paper 20 illustrated in FIG. 10 includes an electronic paper color filter member 10, a counter electrode substrate 23, and a display medium layer 9 disposed between the electronic paper color filter member 10 and the counter electrode substrate 23. is doing. The color filter member 10 for electronic paper is formed on the glass substrate 1, one surface side of the glass substrate 1, and includes a plurality of colored layers (2R, 2G, 2B), and a color filter layer. 2 and a transparent electrode layer 3 formed on the substrate 2. The counter electrode substrate 23 includes a counter base material 21 and a counter electrode layer 22 formed on the counter base material 21. The display medium layer 9 and the counter electrode substrate 23 are bonded together via the adhesive layer 4.
In FIG. 10, the color filter layer 2 and the transparent electrode layer 3 may be stacked in reverse order. Moreover, the color filter member 10 for electronic paper and the display medium layer 9 may be integrated, and the color filter member 10 for electronic paper, the display medium layer 9, and the adhesion layer 4 may be integrated.

  According to the present invention, since the color filter member for electronic paper having a flexible glass substrate is used, both flexibility and barrier properties can be achieved, and the display medium layer of electronic paper can be used for moisture, oxygen, etc. Can be protected from. Further, according to the present invention, since the glass substrate is provided outside the color filter layer, the distance between the color filter layer and the display medium layer is short, and parallax can be hardly generated. Furthermore, since the glass substrate is excellent in dimensional stability, it is possible to perform precise alignment between the color filter member for electronic paper, the display medium layer, and the counter electrode substrate, and misalignment during manufacturing and operation. Can be suppressed. Therefore, it is possible to obtain excellent color display characteristics.

  Furthermore, according to the present invention, since the layer structure of the color filter member for electronic paper can be simplified, the electronic paper can be made thinner and the optical characteristics of the electronic paper can be improved by reducing the number of interface layers. It is possible to make it.

In addition, since it is not necessary to form a barrier layer or attach a barrier film, it is possible to produce an electronic paper by a simple method and to reduce manufacturing costs.
Furthermore, since the glass substrate has the advantages of excellent properties such as light transmission, durability, weather resistance, heat resistance, and low outgas, it is suitable as a substrate for electronic paper.

  Since the color filter member for electronic paper and the display medium layer are described in detail in the section “A. Color filter member for electronic paper”, description thereof is omitted here. Hereinafter, other configurations of the electronic paper of the present invention will be described.

1. Counter electrode substrate The counter electrode substrate used in the present invention has a counter base material and a counter electrode layer formed on the counter base material.

(1) Counter electrode layer The counter electrode layer used in the present invention may be a pixel electrode layer formed so as to be orthogonal to the stripe pattern of the transparent electrode layer, and is connected to a plurality of TFT elements and TFT elements. It may be a TFT electrode layer having a pixel electrode. By using the former, a passive matrix electronic paper can be obtained, and by using the latter, an active matrix electronic paper can be obtained. Among these, it is preferable to use a TFT electrode layer. This is because an active matrix electronic paper with high contrast and high response speed can be obtained.

Such a TFT electrode layer will be specifically described with reference to the drawings. FIG. 11 is a schematic cross-sectional view showing an example of the counter electrode substrate used in the present invention. A counter electrode substrate 23 illustrated in FIG. 11 includes a counter base material 21, a TFT electrode layer 22 ′ formed on the counter base material 21, and having a plurality of TFT elements 24 and pixel electrodes 25 connected to the TFT elements 24. It has. In the TFT electrode layer 22 ′, the TFT element 24 includes a gate electrode 24a, a gate insulating film 24b formed on the gate electrode 24a, a semiconductor layer 24c formed on the gate insulating film 24b, and a semiconductor layer. The pixel electrode 25 is formed so as to be connected to the drain electrode 24e. The pixel electrode 25 has a source electrode 24d and a drain electrode 24e which are formed on the surface 24c so as to face each other with a constant space therebetween.
Further, as illustrated in FIG. 11, the TFT electrode layer 22 ′ may be one in which a protective film 26 is formed so as to cover the TFT element 24, and a pixel electrode 25 is formed on the protective film 26.

  The TFT element is not particularly limited, and is appropriately selected according to the type of the electronic paper of the present invention. For example, the TFT element may have an a-Si TFT structure or a p-Si TFT structure. It may be. In the case of a TFT element having an a-Si TFT structure, either a normal stagger type (top gate structure) or an inverted stagger type (bottom gate structure) may be used. In the case of an inverted stagger type, either a channel etch type or a channel protect type may be used. On the other hand, in the case of a TFT element having a p-Si TFT structure, either a planar type or a stagger type may be used.

  The semiconductor layer constituting the TFT element is not particularly limited as long as it can be formed on the opposing base material. For example, silicon, an oxide semiconductor, or an organic semiconductor is used.

As the silicon, polysilicon or amorphous silicon can be used.
Examples of the oxide semiconductor include zinc oxide (ZnO), titanium oxide (TiO), magnesium zinc oxide (Mg _x Zn _1-x O), cadmium zinc oxide (Cd _x Zn _1-x O), and cadmium oxide (CdO). ), Indium oxide (In ₂ O ₃ ), gallium oxide (Ga ₂ O ₃ ), tin oxide (SnO ₂ ), magnesium oxide (MgO), tungsten oxide (WO), InGaZnO-based, InGaSnO-based, InGaZnMgO-based, InAlZnO-based InFeZnO, InGaO, ZnGaO, and InZnO can be used.
Examples of organic semiconductors include π-electron conjugated aromatic compounds, chain compounds, organic pigments, and organosilicon compounds. More specifically, pentacene, tetracene, thiophen oligomer derivatives, phenylene derivatives, phthalocyanine compounds, polyacetylene derivatives, polythiophene derivatives, cyanine dyes and the like can be mentioned.

  The method for forming the semiconductor layer and the thickness thereof can be the same as those in general.

The gate electrode, the source electrode, and the drain electrode constituting the TFT element are not particularly limited as long as they have desired conductivity, and conductive materials generally used for TFT elements can be used. . Examples of such materials include Ta, Ti, Al, Zr, Cr, Nb, Hf, Mo, Au, Ag, Pt, Mo-Ta alloys, W-Mo alloys, ITO, IZO and other inorganic materials, and And organic materials having conductivity such as PEDOT / PSS.
The formation method and thickness of the gate electrode, the source electrode, and the drain electrode can be the same as those in general.

The gate insulating film constituting the TFT element can be the same as the gate insulating film in a general TFT element. For example, silicon oxide, silicon nitride, aluminum oxide, tantalum oxide, barium strontium titanate (BST) ), Insulating inorganic materials such as lead zirconate titanate (PZT), acrylic resins, phenolic resins, fluorine resins, epoxy resins, cardo resins, vinyl resins, imide resins, novolac resins An insulating organic material such as an insulating organic material can be used.
The formation method and thickness of the gate insulating film can be the same as a general one.

A protective film may be formed on the TFT element. The protective film is provided to protect the TFT element. For example, the semiconductor layer can be prevented from being exposed to moisture or the like contained in the air. By forming the protective film, deterioration of the TFT performance with time can be reduced. For example, silicon oxide or silicon nitride is used as such a protective film.
The method for forming the protective film and the thickness thereof can be the same as those in general.

The pixel electrode is not particularly limited as long as it is generally used for electronic paper or the like, and examples thereof include indium oxide, tin oxide, indium tin oxide (ITO), and indium tin oxide (IZO). Preferably used.
The formation method and thickness of the pixel electrode can be the same as a general one.

(2) Counter substrate The counter substrate used in the present invention supports the counter electrode layer. Such a counter substrate is not particularly limited as long as it is generally used as a substrate such as electronic paper, and preferred examples include a glass plate and a plastic plate.

2. Electronic paper In the electronic paper of the present invention, a display medium layer is usually formed on a color filter member for electronic paper, and the display medium layer and the counter electrode layer of the counter electrode substrate are formed using an adhesive layer made of an adhesive material. It is made by pasting together. The adhesive layer may be formed on the display medium layer, or may be formed on the counter electrode layer. As the adhesive material, the same adhesive material as that described in the section of the color filter layer of “A. Color filter member for electronic paper” can be used. The thickness of the pressure-sensitive adhesive layer is not particularly limited as long as the display medium layer and the counter electrode layer can be bonded so as not to peel off, and the term “color filter layer” in the above “A. Color filter member for electronic paper”. It is the same as the film thickness of the adhesive layer described in 1.

The specific layer structure of the electronic paper of the present invention may be the order of the color filter member for electronic paper, the display medium layer, the adhesive layer, the counter electrode layer, and the counter substrate. Moreover, the color filter member for electronic paper and the display medium layer may be integrated, and the color filter member for electronic paper, the display medium layer, and the adhesive layer may be integrated.
In addition, about the layer structure of the color filter member for electronic paper, since any layer structure described in the above-mentioned item of "A. Color filter member for electronic paper" can be used, description here is abbreviate | omitted.

As described above, the electronic paper of the present invention can have various layer configurations. Among these, it is preferable that the color filter layer or the transparent electrode layer is directly formed on the glass substrate, and the color filter layer and the transparent electrode layer are directly laminated. Examples of the preferred layer structure include the following.
Glass substrate 1 / color filter layer 2 / transparent electrode layer 3 / display medium layer 9 / adhesive layer 4 / counter electrode layer 22 / counter substrate 21 (see FIG. 10)
Glass substrate / transparent electrode layer / color filter layer / display medium layer / adhesive layer / counter electrode layer / opposite substrate Optical function layer / glass substrate / color filter layer / transparent electrode layer / display medium layer / adhesive layer / Counter electrode layer / Counter substrate -Optical function layer / Glass substrate / Transparent electrode layer / Color filter layer / Display medium layer / Adhesive layer / Counter electrode layer / Counter substrate / Surface protective layer / Glass substrate / Color filter Layer / transparent electrode layer / display medium layer / adhesive layer / counter electrode layer / counter substrate / surface protective layer / glass substrate / transparent electrode layer / color filter layer / display medium layer / adhesive layer / counter electrode layer / counter group Material

  The electronic paper of the present invention is used for a display of a digital device, an electronic book, a digital signage (electronic signage), and the like.

C. Next, the manufacturing method of the color filter member for electronic paper of this invention is demonstrated. The method for producing a color filter member for electronic paper according to the present invention uses a roll-shaped glass substrate on which a flexible glass substrate is wound, and uses the glass substrate and one surface side of the glass substrate. And an electronic paper color filter member forming step of forming an electronic paper color filter member having a color filter layer and a transparent electrode layer laminated in random order.

  According to the present invention, since a roll-shaped glass substrate is used, a color filter member for electronic paper that does not require high positional accuracy of each layer can be formed by a roll-to-roll method, and productivity can be improved. Is possible.

  In the color filter member forming step for electronic paper in the present invention, a roll-shaped glass base material on which a flexible glass base material is wound is used. This is a step of forming a color filter member for electronic paper having a color filter layer and a transparent electrode layer laminated in random order.

The roll glass substrate is not particularly limited as long as a flexible glass substrate is wound. In addition, about the glass base material which has flexibility, since it is the same as that of what was described in the term of the said "A. Color filter member for electronic paper", description here is abbreviate | omitted.
Further, the color filter member for electronic paper is the same as that described in the above-mentioned section “A. Color filter member for electronic paper”, and thus the description thereof is omitted here.

The color filter member forming step for electronic paper in the present invention may be a step for forming a color filter member for electronic paper by a roll-to-roll method using a roll glass substrate. In this step, the color filter layer or the transparent electrode layer is directly formed on one surface of the glass substrate unwound from the roll glass substrate, and the color filter layer and the transparent electrode layer are directly laminated. (First aspect), at least one of the color filter layer and the transparent electrode layer may be pasted on one surface of the glass substrate unwound from the roll-shaped glass substrate (second embodiment). Embodiment). Moreover, in this process, you may stick a touchscreen layer on the other surface of the glass base material unwound from the roll-shaped glass base material (3rd aspect).
Hereinafter, the description will be made separately for each aspect.

1. 1st aspect In this aspect, a color filter layer or a transparent electrode layer is directly formed on one surface of the glass substrate unwound from the roll-shaped glass substrate, and the color filter layer and the transparent electrode layer are directly formed. Laminate.

  According to this aspect, since the glass substrate is excellent in dimensional stability, the color filter member for electronic paper is used by directly forming the color filter layer or the transparent electrode layer on one surface of the glass substrate. For electronic paper, it is possible to align with high accuracy when producing electronic paper, and to suppress the displacement during manufacturing and operation, and to improve the dimensional stability of the electronic paper as a whole A color filter member can be obtained. Further, since the glass substrate has very little outgas, it is possible to obtain a color filter member for electronic paper that can suppress deterioration of the display medium layer of the electronic paper due to outgas. Furthermore, since the glass substrate is excellent in weather resistance, durability, and heat resistance, a highly reliable color filter member for electronic paper can be obtained. Moreover, since the glass base material is excellent in light transmittance, the color filter member for electronic paper which can implement | achieve the high brightness | luminance of electronic paper can be obtained. Furthermore, since the layer configuration of the color filter member for electronic paper can be simplified by adopting the above configuration, a color filter member for electronic paper capable of reducing the thickness of the electronic paper and improving the optical characteristics is obtained. be able to.

  In this embodiment, the color filter layer or the transparent electrode layer is directly formed on one surface of the glass substrate unwound from the roll-shaped glass substrate by a roll-to-roll method, and the color filter layer and The transparent electrode layer may be directly laminated, and the order of forming the color filter layer and the transparent electrode layer is not particularly limited. After the color filter layer is directly formed on one surface of the glass substrate, the color filter layer The transparent electrode layer may be directly formed thereon, or the color filter layer may be directly formed on the transparent electrode layer after the transparent electrode layer is directly formed on one surface of the glass substrate.

  The method for forming the color filter layer and the transparent electrode layer has been described in the above section “A. Color filter member for electronic paper”, and will not be described here.

  When forming a color filter member for electronic paper having an optical functional layer or a surface protective layer on the other surface side of the glass substrate, before forming the color filter layer and the transparent electrode layer on one surface of the glass substrate or A long optical function in which an optical functional layer is formed on an optical functional layer substrate on the other surface of a glass substrate after forming a color filter layer and a transparent electrode layer on one surface of the glass substrate. A long surface protective layer laminate in which a surface protective layer is formed on a layer laminate or a surface protective layer substrate may be bonded together by a roll-to-roll method, on the other surface of the glass substrate An optical functional layer or a surface protective layer may be formed.

  Moreover, when forming the color filter member for electronic paper which has an optical function layer or a surface protective layer on the other surface side of a glass base material, the color filter layer and the transparent electrode layer were formed on one surface of the glass base material Later, a laminate in which a color filter layer and a transparent electrode layer are formed on one surface of a glass substrate is cut out into a sheet shape, and a sheet-like optical functional layer laminate or surface protective layer is formed on the other surface of the glass substrate A laminate may be bonded.

  When forming a color filter member for electronic paper having a touch panel layer on the other surface side of the glass substrate, before forming the color filter layer and the transparent electrode layer on one surface of the glass substrate, a roll glass substrate A long touch panel layer may be bonded to the other surface of the glass substrate unwound from the material by a roll-to-roll method, and a color filter layer and a transparent electrode are formed on one surface of the glass substrate. After the layer is formed, the laminate in which the color filter layer and the transparent electrode layer are formed on one surface of the glass substrate is cut out into a sheet shape, and the sheet-like touch panel layer is bonded to the other surface of the glass substrate May be. Considering the alignment accuracy of the color filter layer and the touch panel layer, the latter method is preferable.

  In the latter case, the color filter member forming step for electronic paper is a touch panel layer in which the touch panel layer is aligned and bonded under vacuum by a sheet-to-sheet method, or the touch panel layer is laminated with alignment by a sheet-to-sheet method. It is preferable to have a lamination process. When the color filter member for electronic paper manufactured by the present invention has a touch panel layer, the touch panel layer needs to be aligned with the color filter layer. A color filter member for electronic paper having a function and good color display characteristics when used in electronic paper can be obtained.

  Since the touch panel layer and the formation position thereof are described in the above-mentioned section “A. Color filter member for electronic paper”, description thereof is omitted here.

In the touch panel layer laminating process, since the positional accuracy of the touch panel layer and the color filter layer is required, a sheet that can be aligned and aligned with the touch panel layer or the member including the touch panel layer and the member including the color filter layer Performed by the two-sheet method.
Specifically, a touch panel layer or a member including a touch panel layer, and a member including a color filter layer in which a color filter layer and a transparent electrode layer are formed on one surface of a glass substrate, are sheet-to-sheet methods. Laminate with alignment under vacuum or laminate with alignment by sheet-to-sheet method.
In addition, a member including a touch panel layer obtained by bonding a long touch panel layer and a long optical functional layer laminate or a surface protective layer laminate by a roll-to-roll method, and one surface of a glass substrate A member including a color filter layer and a color filter layer on which a transparent electrode layer is formed is aligned and bonded under vacuum by a sheet-to-sheet method, or laminated with alignment by a sheet-to-sheet method. May be.

  The method of alignment bonding under vacuum by a sheet-to-sheet method is not particularly limited. For example, in a vacuum chamber, a member including a sheet-like color filter layer and a sheet-like touch panel layer or Examples of the method include positioning with a member including a touch panel layer using alignment marks formed in advance on both members, and pressing both members through an adhesive layer. The degree of vacuum is not particularly limited as long as foreign matter and bubbles can be prevented from mixing on the bonding surface, and can be set, for example, within a range of 50 Pa to 10,000 Pa.

  The method for laminating with alignment by the sheet-to-sheet method is not particularly limited. For example, the position of a member including a sheet-like color filter layer and a member including a sheet-like touch panel layer or a touch panel layer. A method of laminating by performing alignment by using alignment marks formed in advance on both members and pressing both members through an adhesive layer can be exemplified.

  When forming a color filter member for electronic paper having a display medium layer, after forming the color filter layer and the transparent electrode layer on one surface of the glass substrate, the display medium layer is formed on the color filter layer and the transparent electrode layer. A laminate in which a color filter layer and a transparent electrode layer are formed on one surface of a glass substrate, and a long display medium layer in which a display medium layer is formed on the display medium layer substrate The laminate may be bonded by a roll-to-roll method. In addition, after forming the color filter layer and the transparent electrode layer on one surface of the glass substrate, the laminate in which the color filter layer and the transparent electrode layer are formed on one surface of the glass substrate is cut out into a sheet shape. Alternatively, it may be bonded to a sheet-like display medium layer laminate.

  Note that the layer configuration of the color filter member for electronic paper in this aspect is described in the section “A. Color filter member for electronic paper”, and thus the description thereof is omitted here.

2. 2nd aspect In this aspect, at least any one of a color filter layer and a transparent electrode layer is affixed on one surface of the glass base material unwound from the roll-shaped glass base material.

  According to this aspect, since at least one of the color filter layer and the transparent electrode layer is stuck on one surface of the glass substrate by a roll-to-roll method, productivity can be further improved.

  In the present embodiment, at least one of the color filter layer and the transparent electrode layer is formed on one surface of the glass substrate unwound from the roll-shaped glass substrate using the adhesive layer by a roll-to-roll method. For example, a glass substrate, a color filter layer laminate in which the color filter layer is formed on the color filter layer substrate, and a transparent electrode in which the transparent electrode layer is formed on the transparent electrode layer substrate. Layer laminates may be laminated in order, a laminate in which a color filter layer is directly formed on one surface of a glass substrate, and a transparent electrode layer in which a transparent electrode layer is formed on a transparent electrode layer substrate A laminate may be bonded together, a glass substrate, and a laminate in which a color filter layer and a transparent electrode layer are stacked in this order on a color filter layer substrate may be bonded together, a glass substrate, Transparent electrode transparent electrode layer on the layer substrate and the color filter layer may be bonded to the laminate are laminated in this order.

  A glass substrate, a color filter layer laminate in which a color filter layer is formed on a color filter layer substrate, and a transparent electrode layer laminate in which a transparent electrode layer is formed on a transparent electrode layer substrate are sequentially bonded together. In this case, first, a roll-shaped glass base material, a long color filter layer laminate, and a long transparent electrode layer laminate are prepared, and then these are sequentially laminated by a roll-to-roll method. . The order of laminating these is not particularly limited, and after laminating the glass substrate and the color filter layer laminate, the color filter layer laminate and the transparent electrode layer laminate may be further laminated. Alternatively, after the color filter layer laminate and the transparent electrode layer are bonded together, the glass substrate and the color filter layer laminate may be bonded together.

  When laminating a laminate in which a color filter layer is directly formed on one surface of a glass substrate and a transparent electrode layer laminate in which a transparent electrode layer is formed on a transparent electrode layer substrate, A long laminate in which a color filter layer is directly formed on one surface of a glass substrate unwound from a glass substrate, and a long transparent electrode layer laminate are prepared, and then these The laminate is laminated by a roll-to-roll method.

  When laminating a glass substrate and a laminate in which a color filter layer and a transparent electrode layer are laminated in this order on a color filter layer substrate, first, a color is formed on the roll glass substrate and the color filter layer substrate. A long laminate in which a filter layer and a transparent electrode layer are directly formed in this order is prepared, and these are then bonded together by a roll-to-roll method.

  When laminating a glass substrate and a laminate in which a transparent electrode layer and a color filter layer are laminated in this order on a transparent electrode layer substrate, first, the roll glass substrate and the transparent electrode layer substrate are transparent. A long laminate in which an electrode layer and a color filter layer are directly formed in this order is prepared, and these are then bonded together by a roll-to-roll method.

  When forming a color filter member for electronic paper having an optical functional layer or a surface protective layer on the other surface side of the glass substrate, the above-mentioned member is bonded by a roll-to-roll method or the above-mentioned member is rolled. After laminating by the two-roll method, the surface on the long optical functional layer laminate or surface protective layer base material in which the optical functional layer is formed on the optical functional layer base material on the other surface of the glass base material A long surface protective layer laminate formed with a protective layer may be bonded by a roll-to-roll method, or an optical functional layer or a surface protective layer may be formed on the other surface of the glass substrate. Good.

  Moreover, when forming the color filter member for electronic paper which has an optical function layer or a surface protective layer in the other surface side of a glass base material, after bonding the above-mentioned member by a roll-to-roll system, the above-mentioned member The laminated body bonded together may be cut into a sheet shape and bonded to the sheet-like optical functional layer laminated body or the surface protective layer laminated body.

  When forming a color filter member for electronic paper having a touch panel layer on the other surface side of the glass substrate, after laminating the above-mentioned members by a roll-to-roll method, You may cut out to a sheet form and may paste together with a sheet-like touch panel layer. In this case, the color filter member forming step for electronic paper is a touch panel layer lamination in which the touch panel layer is aligned and bonded under vacuum by a sheet-to-sheet method, or the touch panel layer is laminated with alignment by a sheet-to-sheet method. It is preferable to have a process. When the color filter member for electronic paper manufactured by the present invention has a touch panel layer, the touch panel layer needs to be aligned with the color filter layer. A color filter member for electronic paper having a function and good color display characteristics when used in electronic paper can be obtained.

  Since the touch panel layer and the formation position thereof are described in the above-mentioned section “A. Color filter member for electronic paper”, description thereof is omitted here.

In the touch panel layer laminating process, since the positional accuracy of the touch panel layer and the color filter layer is required, a sheet that can be aligned and aligned with the touch panel layer or the member including the touch panel layer and the member including the color filter layer Performed by the two-sheet method.
Specifically, a touch panel layer or a member including a touch panel layer and a member including a color filter layer obtained by bonding the above-described members are aligned and bonded under vacuum by a sheet-to-sheet method, or a sheet Laminate with alignment by the two-sheet method.
Moreover, the member containing the touch panel layer which bonded together the elongate touch panel layer and the elongate optical function layer laminated body or the surface protective layer laminated body by the roll-to-roll system, and the above-mentioned member were bonded together. The member including the color filter layer may be aligned and bonded under vacuum by a sheet-to-sheet method, or may be laminated with alignment by a sheet-to-sheet method.

  Note that the method for laminating alignment under vacuum by the sheet-to-sheet method and the method for laminating with alignment by the sheet-to-sheet method are the same as those described in the first aspect, so here The description in is omitted.

  When forming a color filter member for electronic paper having a display medium layer, the transparent electrode layer is formed before the above-described member is bonded by a roll-to-roll method or after the above-described member is bonded by a roll-to-roll method. A display medium layer may be formed on the transparent electrode layer of the laminate, and the display medium layer is formed on the transparent electrode layer of the laminate in which the color filter layer and the transparent electrode layer are laminated in this order on the color filter layer substrate. The display medium layer may be formed on the color filter layer of the laminate in which the transparent electrode layer and the color filter layer are laminated in this order on the transparent electrode layer base material, and the transparent electrode layer laminate and A long display medium layer laminate in which a display medium layer is formed on a display medium layer base material may be bonded together by a roll-to-roll method. A laminate in which a filter layer and a transparent electrode layer are laminated in this order and a long display medium layer laminate may be bonded together by a roll-to-roll method, and the transparent electrode layer and the transparent electrode layer The laminate in which the color filter layers are laminated in this order and the long display medium layer laminate may be bonded together by a roll-to-roll method.

  Further, when forming a color filter member for electronic paper having a display medium layer, after laminating the above-mentioned members by a roll-to-roll method, a laminate in which the above-mentioned members are laminated is cut out into a sheet shape, and a sheet The display medium layer laminate may be bonded together.

  Note that the layer configuration of the color filter member for electronic paper in this aspect is described in the section “A. Color filter member for electronic paper”, and thus the description thereof is omitted here.

3. 3rd aspect In this aspect, a touch-panel layer is stuck on the other surface of the glass base material unwound from the roll-shaped glass base material.

  In this aspect, the roll-to-roll method can be used by sticking the touch panel layer on the other surface of the glass substrate unwound from the roll-shaped glass substrate using the adhesive layer. A glass substrate and a long touch panel layer are prepared, and these are then bonded together by a roll-to-roll method. Next, the member having the touch panel layer bonded to the other surface of the glass substrate and the member including the color filter layer are bonded to each other by a sheet-to-sheet method. Specifically, the member having the touch panel layer bonded to the other surface of the glass substrate and the member including the color filter layer are aligned and bonded under vacuum by a sheet-to-sheet method, or Laminate with alignment by the two-sheet method. Since the positional accuracy of the touch panel layer and the color filter layer is required, the sheet-to-sheet method capable of adjusting the alignment is used.

  When the member having the touch panel layer bonded to the other surface of the glass substrate and the member including the color filter layer are bonded by the sheet-to-sheet method, for example, the touch panel layer is formed on the other surface of the glass substrate. The laminated member, the color filter layer laminate in which the color filter layer is formed on the color filter layer substrate, and the transparent electrode layer laminate in which the transparent electrode layer is formed on the transparent electrode layer substrate are sequentially pasted. You may match, and the member by which the touch panel layer was pasted together on the other surface of the glass substrate and the layered product by which the color filter layer and the transparent electrode layer were laminated in this order on the color filter layer substrate may be pasted together Well, a member with a touch panel layer bonded to the other surface of a glass substrate, and a transparent electrode layer and a color filter layer are laminated in this order on the transparent electrode layer substrate. It may be bonded and laminates.

  Since the touch panel layer and the formation position thereof are described in the above-mentioned section “A. Color filter member for electronic paper”, description thereof is omitted here.

  In addition, the method for laminating and aligning under vacuum by the sheet-to-sheet method and the method for laminating with alignment by the sheet-to-sheet method are the same as those described in the first aspect. The description in is omitted.

When forming a color filter member for electronic paper having an optical functional layer or a surface protective layer on the other surface side of the glass substrate, the glass substrate and the touch panel layer are bonded together by a roll-to-roll method, Before the member having the touch panel layer bonded to the other surface of the material and the member including the color filter layer are bonded, an optical functional layer or a surface protective layer may be formed on the touch panel layer. After the member having the touch panel layer bonded to the surface and the member including the color filter layer are bonded together, an optical functional layer or a surface protective layer may be formed on the touch panel layer.
Moreover, when forming the color filter member for electronic paper which has an optical function layer or a surface protective layer in the other surface side of a glass base material, after bonding a glass base material and a touchscreen layer by a roll-to-roll system, Before bonding the member with the touch panel layer bonded to the other surface of the glass substrate and the member with the color filter layer, the member with the touch panel layer bonded to the other surface of the glass substrate and the long optical The functional layer laminate or the surface protective layer laminate may be bonded by a roll-to-roll method.

  When forming a color filter member for electronic paper having a display medium layer, before bonding the member having the touch panel layer bonded to the other surface of the glass substrate and the member including the color filter layer by the sheet-to-sheet method In addition, a display medium layer may be formed on the transparent electrode layer of the transparent electrode layer laminate in which the transparent electrode layer is formed on the transparent electrode layer substrate, and the color filter layer and the transparent electrode are formed on the color filter layer substrate. The display medium layer may be formed on the transparent electrode layer of the laminate in which the layers are laminated in this order, and the laminate color filter in which the transparent electrode layer and the color filter layer are laminated in this order on the transparent electrode layer base material A display medium layer may be formed on the layer, and a transparent electrode layer laminate and a long display medium layer laminate in which the display medium layer is formed on the display medium layer base material are rolled to roll. It is also possible to bond together a laminate in which a color filter layer and a transparent electrode layer are laminated in this order on a color filter layer base material and a long display medium layer laminate by a roll-to-roll method. Alternatively, a laminate in which a transparent electrode layer and a color filter layer are laminated in this order on a transparent electrode layer base material and a long display medium layer laminate may be bonded together by a roll-to-roll method. .

  When a color filter member for electronic paper having a display medium layer is formed, a member having a touch panel layer bonded to the other surface of the glass substrate and a member including the color filter layer are pasted by a sheet-to-sheet method. After being combined, the laminate in which the above-described members are bonded may be cut into a sheet shape and bonded to the sheet-shaped display medium layer stack.

  Note that the layer configuration of the color filter member for electronic paper in this aspect is described in the section “A. Color filter member for electronic paper”, and thus the description thereof is omitted here.

D. Next, the manufacturing method of the electronic paper of this invention is demonstrated. The method for producing electronic paper of the present invention is for electronic paper that forms a color filter member for electronic paper having the above-mentioned display medium layer using a rolled glass substrate on which a flexible glass substrate is wound. A display medium for the color filter member for electronic paper, comprising: a color filter member forming step; the color filter member for electronic paper; and a counter electrode substrate having a counter substrate and a counter electrode layer formed on the counter substrate. And a bonding step of performing alignment bonding under vacuum by a sheet-to-sheet method so that the counter electrode layer of the counter electrode substrate faces the layer.

  According to the present invention, a color filter member for electronic paper that does not require high positional accuracy of each layer is formed by a roll-to-roll method, and a color filter for electronic paper having a display medium layer that requires precise alignment. By bonding the member and the counter electrode substrate by vacuum alignment bonding using a sheet-to-sheet method, it is possible to achieve highly accurate alignment and productivity improvement. Moreover, electronic paper excellent in color display characteristics can be obtained by using the above-described color filter member for electronic paper.

  In addition, since it described in the said "C. manufacturing method of the color filter member for electronic paper" about the color filter member formation process for electronic paper which forms the color filter member for electronic paper which has a display medium layer, description here Is omitted. Hereinafter, other steps in the method for producing electronic paper of the present invention will be described.

1. Bonding step The bonding step in the present invention is a color filter member for electronic paper and a counter electrode substrate having a counter substrate and a counter electrode layer formed on the counter substrate. This is a step of alignment bonding under vacuum by a sheet-to-sheet method so that the display medium layer and the counter electrode layer of the counter electrode substrate face each other.
The counter electrode substrate has been described in the section “B. Electronic Paper”, and thus the description thereof is omitted here.

  In this step, the color filter member for electronic paper and the counter electrode substrate are usually bonded together using an adhesive layer made of an adhesive material. The adhesive layer may be formed on the color filter member for electronic paper or may be formed on the counter electrode substrate. The adhesive layer has been described in the above section “B. Electronic paper”, and the description thereof is omitted here.

  The method of alignment bonding under vacuum by a sheet-to-sheet method is not particularly limited, but for example, in a vacuum chamber, a sheet-like color filter member for electronic paper and a sheet-like counter electrode substrate And a method of performing bonding using an alignment mark formed in advance on both members and pressing both members through an adhesive layer. The degree of vacuum is the same as that described in the above-mentioned section “C. Manufacturing method of color filter member for electronic paper”.

2. Arbitrary process The manufacturing method of the electronic paper of this invention may have an arbitrary process as needed other than said color filter member formation process for electronic paper and a bonding process which are essential processes. . As such a process, for example, before the bonding step, a step of cutting out the color filter member for electronic paper formed by the color filter member forming step for electronic paper into a sheet, a cleaning step, UV irradiation, etc. A surface modification process, a dehumidification process, an inspection process, etc. can be mentioned.

3. Electronic Paper The layer configuration and use of electronic paper manufactured by the method for manufacturing electronic paper of the present invention are described in the above section “B. Electronic Paper”, and thus description thereof is omitted here.

  The present invention is not limited to the above embodiment. The above-described embodiment is an exemplification, and the present invention has substantially the same configuration as the technical idea described in the claims of the present invention, and any device that exhibits the same function and effect is the present invention. It is included in the technical scope of the invention.

DESCRIPTION OF SYMBOLS 1 ... Glass base material 2 ... Color filter layer 3 ... Transparent electrode layer 4 ... Adhesive layer 5 ... Optical functional layer 6 ... Surface protective layer 7 ... Touch panel layer 9 ... Display medium layer 10 ... Color filter member for electronic paper 12 ... Color filter Layer base material 13 ... Transparent electrode layer base material 15 ... Optical functional layer base material 16 ... Surface protective layer base material 20 ... Electronic paper 21 ... Counter base material 22 ... Counter electrode layer

Claims (11)

A glass substrate having flexibility;
A color filter layer and a transparent electrode layer laminated in random order on one surface side of the glass substrate, and a display medium layer of electronic paper is disposed on the color filter layer and the transparent electrode layer side. The color filter member for electronic paper characterized by the above-mentioned.   2. The color filter layer or the transparent electrode layer is directly formed on one surface of the glass substrate, and the color filter layer and the transparent electrode layer are directly laminated. The color filter member for electronic paper of description.   The color filter for electronic paper according to claim 1, wherein the optical functional layer or the surface protective layer is formed on the other surface side of the glass substrate and disposed on the outermost surface. Element.   The color filter member for electronic paper according to any one of claims 1 to 3, wherein a touch panel layer is formed on the other surface side of the glass substrate.   The color filter member for electronic paper according to any one of claims 1 to 4, wherein a display medium layer is formed on the color filter layer and the transparent electrode layer. A glass substrate having flexibility, and a color filter member for electronic paper having a color filter layer and a transparent electrode layer laminated in random order on one surface side of the glass substrate;
A counter electrode substrate having a counter substrate and a counter electrode layer formed on the counter substrate;
An electronic paper comprising the color filter layer and the transparent electrode layer of the color filter member for the electronic paper, and a display medium layer disposed between the counter electrode layers of the counter electrode substrate.   Using a rolled glass substrate on which a flexible glass substrate is wound, the glass substrate, and a color filter layer and a transparent electrode layer laminated in random order on one surface side of the glass substrate The manufacturing method of the color filter member for electronic paper characterized by having the color filter member formation process for electronic paper which forms the color filter member for electronic paper which has this.   In the color filter member forming step for electronic paper, directly form the color filter layer or the transparent electrode layer on one surface of the glass substrate unwound from the roll-shaped glass substrate; and The method for producing a color filter member for electronic paper according to claim 7, wherein the color filter layer and the transparent electrode layer are directly laminated.   At least one of the color filter layer and the transparent electrode layer is pasted on one surface of the glass substrate unwound from the rolled glass substrate in the color filter member forming step for the electronic paper The manufacturing method of the color filter member for electronic paper of Claim 7 characterized by the above-mentioned.   The electronic paper color filter member forming step includes a touch panel layer lamination step in which the touch panel layer is aligned and bonded under vacuum by a sheet-to-sheet method, or the touch panel layer is laminated with alignment by a sheet-to-sheet method. The method for producing a color filter member for electronic paper according to any one of claims 7 to 9, wherein the method is provided. A color filter member forming step for electronic paper that forms the color filter member for electronic paper according to claim 5, using a roll-shaped glass substrate on which a glass substrate having flexibility is wound,
The color filter member for electronic paper, and the counter electrode substrate having the counter substrate and the counter electrode layer formed on the counter substrate, the display medium layer of the color filter member for electronic paper and the counter electrode substrate An electronic paper manufacturing method comprising: a bonding step of performing alignment bonding under vacuum by a sheet-to-sheet method so that the counter electrode layers face each other.

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