JP5974565B2 - Electronic paper material - Google Patents

Description

  The present invention relates to an electronic paper member capable of suppressing deterioration of electronic paper due to use in an outdoor environment.

Various advertising media are used in order to call attention and promote advertisements for pedestrians and vehicle passengers outdoors. Examples of such advertising media include billboards, advertising towers, building wall surfaces, vehicle surfaces, and the like.
Conventionally, a drawing type advertising medium in which character information, a picture, or the like is directly drawn on the surface of a display portion of the advertising medium using a paint or the like is known as the advertising medium. Further, as the advertisement medium, a wrapping type advertisement medium in which the surface of the display portion of the advertisement medium is covered with a film on which advertisement information or the like is printed is also employed.

  However, the advertisement medium having the above-described configuration may not have sufficient visibility of displayed information, and it may be difficult to sufficiently perform functions such as alerting functions and advertisements. There is.

  Therefore, as the advertisement medium, an advertisement medium with a built-in display device in which a display device such as an LED display device (for example, Patent Document 1) or a liquid crystal display device is incorporated in part or the entire display portion of the advertisement medium is adopted. Has been. Since these display media with built-in display devices can change their design properties over time, it is possible to perform functions such as alerting functions and advertisements with higher performance.

However, any display medium with a built-in display device has a problem that power consumption increases because it is necessary to constantly supply power in order to display information. In addition, there is a problem that the visibility of the display device is deteriorated during the daytime due to the influence of external light.
In addition, since the advertisement medium has many members used in the display device and the structure of the advertisement medium itself becomes large, the manufacturing process is complicated, and it is difficult to reduce the thickness and weight.
Therefore, there is a need for a new member that can change the design of the advertising medium with less power consumption and can simplify the configuration of the advertising medium.

Incidentally, in recent years, an information medium called electronic paper has been attracting attention. This information medium has excellent characteristics such as low power consumption, bendable flexibility, thinness and lightness, and has an outstanding feature that it can be rewritten, and is entering a practical stage.
Such electronic paper has a configuration in which a display medium layer including a display medium is disposed between a pair of electrode base materials.
In addition, the electronic paper that has been proposed in the past is often not expected to be installed and used in an outdoor environment for a certain period of time. The weather resistance, water resistance, The construction of electronic paper having various properties such as scratch resistance and impact resistance has not yet been found.

JP 2010-26863 A

  The present invention has been made in view of the above circumstances, and it is possible to change the design of the display surface of the advertising medium over time by sticking it on the surface of the display part of the advertising medium. An object of the present invention is to provide an electronic paper member capable of suppressing deterioration of electronic paper due to use in the environment.

  In order to solve the above problems, the present invention provides a transparent electrode substrate having a transparent substrate and a transparent electrode formed on the transparent substrate, a back substrate, and a back electrode formed on the back substrate. The back electrode base material, the electronic paper formed between the transparent electrode base material and the back electrode base material and having a display medium layer including a display medium, and the display medium layer side of the transparent electrode base material A first protective layer disposed on the opposite surface, a second protective layer disposed on a surface of the back electrode substrate opposite to the display medium layer side, and the first protective layer and the first protective layer; A protective portion having a sealing member for sealing between two protective layers, and an adhesive layer disposed on the surface of the second protective layer opposite to the electronic paper side, An electronic paper member is provided.

According to this invention, by having the said protection part, electronic paper can be arrange | positioned inside the said protection part provided with durability with respect to an outdoor environment. Therefore, it can be set as the electronic paper member which can suppress deterioration of the electronic paper by the use in an outdoor environment.
Moreover, according to this invention, an electronic paper member can be stuck using the said sticking layer on the surface of the display part of an advertising medium by having the said sticking layer. Therefore, the configuration of the advertisement medium can be simplified, and the manufacture thereof can be performed by a simple process.

  In the present invention, the display medium layer preferably includes a twisted ball having two hues having different charging characteristics as the display medium, and further includes a low polarity solvent layer containing a low polarity solvent. This is because the weather resistance of the display medium layer can be improved, and deterioration of the electronic paper due to use in an outdoor environment can be further suppressed.

  The electronic paper member of the present invention can change the design of the display part of the advertising medium over time by being stuck on the surface of the display part of the advertising medium, and the deterioration of the electronic paper due to use in an outdoor environment There exists an effect that it can control.

It is the schematic which shows an example of the electronic paper member of this invention. FIG. 2 is a schematic plan view illustrating an example of a back electrode in the electronic paper illustrated in FIG. 1. It is explanatory drawing explaining the display method using the electronic paper member of this invention.

Hereinafter, the electronic paper member of the present invention will be described.
The electronic paper member of the present invention includes a transparent substrate having a transparent substrate and a transparent electrode formed on the transparent substrate, a back electrode and a back electrode base having a back electrode formed on the back substrate. Material, electronic paper formed between the transparent electrode substrate and the back electrode substrate and having a display medium layer containing a display medium, and a surface of the transparent electrode substrate opposite to the display medium layer side A first protective layer disposed above, a second protective layer disposed on a surface of the back electrode substrate opposite to the display medium layer side, and the first protective layer and the second protective layer. It has the protection part which has the sealing member which seals between, and the sticking layer arrange | positioned on the surface on the opposite side to the said electronic paper side of the said 2nd protective layer, It is characterized by the above-mentioned.

Here, the electronic paper member of this invention is demonstrated using figures. FIG. 1 is a schematic view of an electronic paper member of the present invention, FIG. 1 (a) is a plan view when the electronic paper member of the present invention is observed from the transparent electrode side, and FIG. 1 (b) is FIG. It is AA sectional view taken on the line of (a). FIG. 2 is a schematic plan view showing an example of a back electrode used in the electronic paper member illustrated in FIG.
As illustrated in FIGS. 1 and 2, the electronic paper member 10 of the present invention includes a transparent substrate 11 a having a transparent substrate 11 a and a transparent electrode 11 b formed on the transparent substrate 11 a, a back substrate 12 a, and A back electrode substrate 12 having a back electrode 12b formed on the back substrate 12a, and an electron having a display medium layer 13 formed between the transparent electrode substrate 11 and the back electrode substrate 12 and including the display medium 13a. Paper 1 and a first protective layer 21 disposed on the surface of the transparent electrode substrate 11 opposite to the display medium layer 13 side, and a surface of the back electrode substrate 12 opposite to the display medium layer 13 side. The protective part 2 which has the sealing member 23 which seals between the 2nd protective layer 22 arrange | positioned and the 1st protective layer 21 and the 2nd protective layer 22, and the said electronic paper 1 side of the said 2nd protective layer 22 On the opposite surface And having a arranged adhesive layer 3. In the electronic paper member 10 of the present invention, the decorative layer 4 may be formed on the surface of the first protective layer 21 opposite to the electronic paper 1 side.
The electronic paper 1 illustrated in FIG. 1B includes a display medium layer 13 that includes a twist ball as the display medium 13a, and further includes a low polarity solvent layer 13b and a display medium layer base material 13c. In addition, the electronic paper 1 usually performs two-color display using the display medium layer 13.
Further, as illustrated in FIG. 2, the electronic paper 1 illustrated in FIG. 1 includes a D display, a N display, a D shape corresponding to the P display, a N shape, a P shape, and a background shape. It has the back electrode 12b which has.
In FIG. 1 (a), portions corresponding to the shapes of D, N, and P are indicated by broken lines for explanation.

According to this invention, electronic paper can be arrange | positioned inside the said protection part provided with durability with respect to an outdoor environment by having the said protection part. Therefore, it can be set as the electronic paper member which can suppress deterioration of the electronic paper by the use in an outdoor environment.
Moreover, according to this invention, an electronic paper member can be stuck using the said sticking layer on the surface of the display part of an advertising medium by having the said sticking layer. Therefore, the configuration of the advertisement medium can be simplified, and the manufacture thereof can be performed by a simple process.

Here, a specific example is given and demonstrated about the method of displaying using the electronic paper member of this invention. FIG. 3 is an explanatory diagram for explaining a display method using the electronic paper member illustrated in FIG. 1 and the like. Hereinafter, an example of a display method for displaying DNP characters using the electronic paper member 10 will be described.
First, the display medium in the display medium layer is driven by applying a drive voltage in the same direction between the back electrode and the transparent electrode in the shape of D, N, P, and background in the electronic paper, As illustrated in FIG. 3A, only one of the two different colors is displayed on the electronic paper member 10. Next, by applying a driving voltage in the direction opposite to that between the other back electrode and the transparent electrode between the D shape back electrode and the transparent electrode, the display existing at a position corresponding to the D shape back electrode Only the state of the display medium in the medium layer is changed, and the information displayed on the electronic paper member 10 is rewritten to display D on the electronic paper member 10 in the other color as illustrated in FIG. indicate. Similarly, by applying a drive voltage in the same direction as the drive voltage applied between the back electrode and the transparent electrode of D shape between the back electrode and the transparent electrode of N shape and P shape, 3C and FIG. 3C, the information displayed on the electronic paper member 10 is rewritten by changing the state of the display medium in the display medium layer existing at the position corresponding to the back electrode of the shape of P and the shape of P. As illustrated in d), the display of N and the display of P are each displayed on the electronic paper member 10 in the other color. Next, by reversing the direction of the drive voltage applied between the back electrode and transparent electrode of each display shape and the drive voltage applied between the back electrode and transparent electrode of the background shape, the back electrode of each display shape And the state of the display medium in the display medium layer existing at the position corresponding to the back electrode in the shape of the background is changed, and each color of the two-color display in FIG. Is displayed on the electronic paper member 10. Further, the drive voltage applied between the back electrode and the transparent electrode in the shape of each display is set in the same direction as the drive voltage applied between the back electrode and the transparent electrode in the background shape, so that the display medium in the display medium layer As shown in FIG. 3F, only the other color of the two colors is displayed on the electronic paper member 10.
In addition, the said display method is an example and the display method using the electronic paper member of this invention is not limited to the said display method.

As described above, since the electronic paper member of the present invention can change the information displayed over time, the display unit can be obtained by sticking the electronic paper member on the surface of the display unit of the advertising medium. The designability of can be changed over time. Therefore, it is possible to improve the visibility of information displayed on the display portion of the advertising medium and make it easier to catch the eye. it can.
Hereinafter, the electronic paper member of the present invention will be described in detail.

1. First, the protection unit used in the present invention will be described. The protective part used in the present invention has a first protective layer, a second protective layer, and a sealing member. Moreover, the said protection part is equipped with durability with respect to an outdoor environment.

Here, “the protection part has durability against the outdoor environment” means that when the electronic paper member of the present invention is installed outdoors for 365 days, it is installed inside the protection part by sunlight, moisture in the atmosphere, or the like. It refers to providing durability that does not deteriorate the display characteristics of electronic paper.
In addition, regarding the fact that “the protective part has durability against the outdoor environment”, the response speed of the electronic paper placed in the protective part is determined by an accelerated weather resistance test according to JIS-B-7350 using a sunshine weather meter. This can be confirmed by not slowing down (for example, speed is not halved), no yellowing of electronic paper, and no significant fading of electronic paper.

(1) 1st protective layer The said 1st protective layer is arrange | positioned on the surface on the opposite side to the display medium layer side of a transparent electrode base material in the electronic paper member of this invention, Usually, an electronic paper member Are arranged on the outermost layer of the display surface.

  Such a first protective layer has transparency, weather resistance, water resistance, scratch resistance, and impact resistance.

The transparency of the first protective layer is not particularly limited as long as the information displayed by the display medium layer of the electronic paper can be observed through the first protective layer. As a specific transparency of the first protective layer, the transmittance in the visible light region is preferably 80% or more, and more preferably 90% or more. This is because, when the transmittance is in the above range, it is possible to prevent the display luminance of the electronic paper member of the present invention from being lowered.
Here, the transmittance of the first protective layer can be measured according to JIS K7361-1 (a test method for the total light transmittance of plastic-transparent material).

  In addition, as the water resistance of the first protective layer, when the electronic paper member of the present invention is used in an outdoor environment, the transparent electrode base material, the back electrode base material, and the display medium layer in the electronic paper due to moisture in the atmosphere. There is no particular limitation as long as the deterioration can be suppressed. As such water resistance, it is preferable to show IPX6 or more in the waterproof and dustproof protection standards defined by IEC (International Electrotechnical Commission).

  Further, as the weather resistance of the first protective layer, when the electronic paper member of the present invention is used in an outdoor environment, the deterioration of the transparent electrode substrate, the back electrode substrate and the display medium layer in the electronic paper is suppressed. There is no particular limitation as long as it is possible. As such weather resistance, there is no change in properties such as deformation, discoloration, and deterioration of the first protective layer when an accelerated weather resistance test according to JIS-B-7350 is performed using a sunshine weather meter. Is preferred. In addition, it is preferable that the electronic paper is not greatly discolored.

  In addition, the scratch resistance of the first protective layer is not particularly limited as long as it is possible to suppress a decrease in the visibility of information displayed on the electronic paper due to scratches on the surface of the first protective layer. Such scratch resistance is preferably 2H or more in a pencil hardness test according to JIS K5600-5-4.

  Further, the impact resistance of the first protective layer should be such that the occurrence of cracks, cracks, etc. of the first protective layer can be suppressed when the electronic paper member of the present invention is used in an outdoor environment. If it does not specifically limit. As such impact resistance, it is preferable that there is no abnormality in a pendulum impact test according to JIS K7110.

The first protective layer may be flexible or rigid.
When the first protective layer has flexibility, the electronic paper member of the present invention can be stuck on the surface of the display portion of the advertising medium having a curved surface structure. Therefore, it can be set as the electronic paper member which can change the design property of the advertising medium which has a curved surface structure with time.
On the other hand, when the first protective layer is rigid, the weather resistance, water resistance, scratch resistance, impact resistance, etc. of the first protective layer can be made better, and electronic paper is more suitable. Can be protected.

  Examples of the material for the first protective layer include a general resin transparent substrate. Examples of the resin used for the resin transparent substrate include acrylic resin, polycarbonate resin, styrene, vinyl chloride, polyethylene terephthalate (PET), polyethylene naphthalate (PEN), and triacetyl cellulose (TAC). In the present invention, among the above-described resins, preferred resins include acrylic resin and polycarbonate. This is because, when the above-described resin is used, it is possible to make the first protective layer less susceptible to yellowing.

The thickness of the first protective layer is not particularly limited as long as it has a desired transparency and can have various properties such as the above-described weather resistance, but is in a range of 0.2 mm to 5 mm. Of these, it is particularly preferable that the thickness is in the range of 0.5 mm to 3 mm, particularly in the range of 1 mm to 2 mm.
This is because if the first protective layer is too thin, the first protective layer may be easily damaged when the electronic paper member of the present invention is used, and if the first protective layer is too thick, the electronic device of the present invention may be damaged. This is because it is difficult to make the paper member a thin film and lightweight, and the workability may be reduced.

(2) Second protective layer Next, the second protective layer used in the present invention will be described. The 2nd protective layer in this invention is arrange | positioned on the surface on the opposite side to the display medium layer side of a back electrode base material.

The second protective layer is not particularly limited as long as it has weather resistance and water resistance and can seal the electronic paper together with the first protective layer and the sealing member.
Since the weather resistance and water resistance of the second electrode layer can be the same as the weather resistance and water resistance of the first electrode layer, description thereof is omitted here.

  The second protective layer may be flexible or rigid. Each advantage when the second protective layer is flexible or rigid can be the same as that described in the section of the first protective layer.

  In the present invention, both the first protective layer and the second protective layer may be selected so as to be flexible or rigid, and either the first protective layer or the second protective layer. One may be flexible and the other may be selected to be rigid, but both the first protective layer and the second protective layer are flexible or rigid. It is more preferable to select.

  Since a general resin base material can be used as the material of the second protective layer, description thereof is omitted here. Preferably, it can be the same as the resin substrate described in the section of the first protective layer.

  Since the thickness of the second protective layer can be the same as the thickness of the first protective layer described above, description thereof is omitted here.

(3) Sealing member The sealing member seals the first protective layer and the second protective layer.

Such a sealing member has weather resistance and water resistance, seals the first protective layer and the second protective layer, and is surrounded by the first protective layer, the second protective layer, and the sealing member. There is no particular limitation as long as it can be sealed. For example, it may be a curable adhesive layer formed around the first protective layer and the second protective layer and formed between the first protective layer and the second protective layer. 2 The sealing tape etc. which were arrange | positioned so that the outer periphery of a protective layer might be covered may be sufficient.
Examples of the curable adhesive include a thermosetting adhesive and a photocurable adhesive. Specific examples include polyimide resins, silicone resins, epoxy resins, acrylic resins, urethane resins, and the like.
Moreover, in order to ensure the height of a curable adhesive layer, a granular spacer can be mixed with the adhesive mentioned above.
Moreover, about a sealing tape, a general thing can be used.

  You may use together about the curable adhesive layer and sealing tape which were mentioned above. Moreover, in this invention, you may fix a 1st protective layer and a 2nd protective layer using a volt | bolt and a nut together with the sealing member mentioned above. Thereby, the sealing property of the space enclosed by the 1st protective layer, the 2nd protective layer, and the sealing member can be made more favorable.

  The method for forming the sealing member can be the same as a general method for forming a sealing member, and the description thereof is omitted here.

(4) Other Configurations The protective part in the present invention is not particularly limited as long as it includes the first protective layer, the second protective layer, and the sealing member described above, and a necessary configuration is appropriately selected and added. be able to.
As such a configuration, for example, the decorative layer 4 disposed on the opposite side of the first protective layer 21 from the transparent electrode substrate 11 side can be cited as illustrated in FIG. The decorative layer is mainly disposed at a position corresponding to a laminated portion of the display medium layer. By including the decorative layer, it is possible to hide a portion that is not preferable in appearance such as the above-described laminate portion, and thus it is possible to improve the appearance of the electronic paper member.

  As the decorative layer, for example, a colored film is formed on a resin film substrate using a colorant of a desired color, and this is bonded through an adhesive layer or the like. Examples include those in which a colored layer is directly formed on the surface using a colorant. Since the resin film substrate, the colored layer, and the adhesive layer can be the same as those in general, description thereof is omitted here.

(5) Others In the protective part, at least one of the first protective layer and the transparent electrode base material or the second protective layer and the back electrode base material is bonded and used via an adhesive layer or the like. The pressure-sensitive adhesive layer can be the same as that used for general electronic paper, and thus description thereof is omitted here. In addition, when bonding a 1st protective layer and a transparent electrode base material, what has transparency is used as said adhesion layer.

2. Next, the electronic paper used in the present invention will be described. Here, the electronic paper refers to a display element that mainly displays different colors and can electrically rewrite information. Electronic paper uses reflected light from outside light, and mainly uses power when rewriting information, and does not consume power during display or consumes very little power. Has the advantage of less.

  Such electronic paper has a transparent electrode substrate, a back electrode substrate, and a display medium layer.

  The electronic paper is not particularly limited as long as it can perform desired display using an advertising medium, but is fixed using a back electrode having a pattern shape corresponding to information displayed on the electronic paper. It is preferable that the information display can be performed. This is because the electronic paper member of the present invention can be formed at low cost. Moreover, in this invention, you may have the part which performs the said fixed information display, and the part which performs variable information display using the transparent electrode and back electrode which were formed so that a matrix might be comprised.

(1) Transparent electrode base material First, a transparent electrode base material is demonstrated. The said transparent electrode base material has a transparent base material and the transparent electrode formed on the transparent base material. Moreover, in the said electronic paper, the surface at the side of a transparent electrode base material is used as a display surface.

(A) Transparent base material The transparent base material used for the said transparent electrode base material is demonstrated.
The transparent substrate used for the transparent electrode substrate in the present invention is not particularly limited as long as it has desired transparency, and is the same as the transparent substrate used for general electronic paper. Things can be used. Especially, it is preferable that the transmittance | permeability in visible region is 80% or more, and, as for the transparent base material used for this invention, it is more preferable that it is 90% or more. This is because, when the transmittance is in the above range, it is possible to prevent the display brightness of the electronic paper from being lowered.
Here, the transmittance | permeability of a transparent base material can be measured by JISK7361-1 (the test method of the total light transmittance of a plastic-transparent material).

The transparent substrate used in the present invention may be a rigid transparent substrate or a transparent substrate having flexibility.
Especially, in this invention, it is preferable to use the transparent base material which has flexibility. This is because, by using a transparent base material having flexibility, it is possible to impart flexibility to the electronic paper and improve workability.

Examples of such a transparent substrate include an inorganic transparent substrate and a resin transparent substrate.
As the inorganic transparent substrate, a glass substrate can be exemplified. Moreover, as glass, soda-lime glass, alkali-free glass, quartz glass, etc. can be used, and alkali-free glass is preferable among them.
On the other hand, as resins used for resin-made transparent substrates, polypropylene, polyethylene, polyvinyl chloride, polystyrene, polyvinyl alcohol, polyimide, polyethylene naphthalate, polyethylene terephthalate, polycarbonate, polyether imide, polyether ether ketone, polyether ketone , Polyphenylene sulfide, liquid crystal polymer, epoxy resin, silicone resin, phenol resin and the like.

Moreover, when using a resin-made transparent base material, it is preferable that a lamination process is possible. When the transparent substrate is also used as the display medium layer substrate described later, or when laminated with the display medium layer, laminating can be used, and electronic paper can be formed in a simple process. is there.
Examples of the transparent base material that can be laminated include a base material on which a base film material and a sealant film material that can be laminated are laminated.

As base film materials that can be laminated, polyimide, polyethylene naphthalate, polyethylene terephthalate, polycarbonate, polyether imide, polyether ether ketone, polyether ketone, polyphenylene sulfide, A liquid crystal polymer, an epoxy resin, a silicone resin, a phenol resin, etc. are mentioned.
Moreover, as a sealant film material, a non-stretched polypropylene film, a biaxially stretched polypropylene film, etc. are mentioned. It is also possible to use a coating film made of a heat-sealable material such as polyurethane, polyacryl, epoxy resin, or silicone.
At the time of laminating, the transparent base material and the counter base material are disposed and bonded so that the sealant film material side of the laminated base film material and sealant film material face each other.

  In addition, when laminating is performed using a transparent base material in which a base film material and a sealant film material that can be laminated and a counter base material described later are laminated, the same base material is used for the transparent base material and the counter base material described below. More preferably, it is a film material and a sealant film material. By using the same base film material and sealant film material for the transparent substrate and the counter substrate described later, it is possible to improve the adhesion between the transparent substrate and the counter substrate when laminating. Because it becomes.

  The thickness of such a transparent substrate is not particularly limited as long as a transparent electrode described later can be formed. The thickness of such a transparent substrate is preferably in the range of 10 μm to 300 μm, more preferably in the range of 15 μm to 100 μm, and particularly preferably in the range of 25 μm to 50 μm. It is because it becomes difficult to form the transparent electrode mentioned later on a transparent substrate when the thickness of the said transparent substrate is less than the said range. Also, if the thickness of the transparent substrate exceeds the above range, the electronic paper becomes thick and difficult to stick on the surface of the display portion of the advertising medium, or contrary to the transparent electrode described later This is because when the display medium layer is disposed on the side, it may be difficult to drive the display medium.

(B) Transparent electrode Next, the transparent electrode used for the said transparent electrode base material is demonstrated.
When the electronic paper performs fixed information display, the transparent electrode is usually formed on the entire surface of the transparent substrate.
On the other hand, when the electronic paper performs variable information display, for example, when variable information display is performed by passive driving, one of the transparent electrode and the back electrode described later is a scanning (row) electrode, and the other is It shall be used as a signal (column) electrode. Since the shape of the transparent electrode in this case can be the same as that used for general passive-driven electronic paper, description thereof is omitted here.
In addition, when the electronic paper has a portion for displaying fixed information and a portion for displaying variable information, the transparent electrode corresponding to each portion has the above-described modes.

  The material of the transparent electrode used in the present invention 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), Conductive oxides such as tin oxide, zinc oxide, indium oxide, aluminum zinc oxide (AZO), metals such as Au, Ni, Ag, conductive polymers such as polyaniline, polyacetylene, polyalkylthiophene derivatives, polysilane derivatives, Carbon nanotubes, graphene, and the like can be used, and among them, ITO is preferably used.

  The thickness of the transparent electrode used in the present invention is not particularly limited as long as it can function as a transparent electrode, but is preferably in the range of 15 nm to 200 nm. When the thickness of the transparent electrode is less than the above range, it is difficult to form the transparent electrode with a uniform thickness. When the thickness of the transparent electrode exceeds the above range, it is used for forming the transparent electrode. This is because the manufacturing cost increases because more time and materials are required.

  The method for forming the transparent electrode used in the present invention is not particularly limited as long as the transparent electrode can be formed with a desired thickness. As a method for forming such a transparent electrode, a general electrode film forming method can be used. For example, a PVD method such as a vacuum deposition method, a sputtering method, or an ion plating method, a CVD method, or a conductive paste is used. The method of apply | coating etc. are mentioned.

(C) Other structure The transparent electrode base material in this invention will not be specifically limited if it has the transparent electrode mentioned above and a transparent base material, A required structure can be selected suitably and can be added.
Examples of such a configuration include an auxiliary electrode and wiring.

Here, the auxiliary electrode is an electrode formed in a mesh shape using a conductive material, and is formed by laminating on a transparent electrode. By using the auxiliary electrode together with the transparent electrode, the conductivity of the transparent electrode substrate can be improved.
Since the auxiliary electrode can be the same as that used for a transparent electrode substrate of general electronic paper, description thereof is omitted here.

  Moreover, about the wiring used for a transparent electrode base material, since it can be made to be the same as that used for general electronic paper, description here is abbreviate | omitted.

(D) Others The arrangement of the transparent electrode substrate in the electronic paper is not particularly limited as long as the display medium in the display medium layer can be driven, and the transparent electrode side of the transparent electrode substrate is the display medium. It may be arranged so as to face the layer, or may be arranged so that the transparent substrate side faces the display medium layer. By arranging the transparent substrate side to face the display medium layer, since the transparent electrode does not directly contact the display medium layer, the material of the transparent electrode does not elute into the low polarity solvent of the display medium layer. It becomes possible to prevent the display quality of the electronic paper from deteriorating. In addition, the driving voltage can be lowered by arranging the transparent electrode side so as to face the display medium layer.

(2) Back Electrode Base The back electrode base in the present invention has a back base and a back electrode formed on the back base.

(A) Back base material The back base material in this invention supports a back electrode.
In addition, the back substrate in the present invention usually has insulating properties.

The back substrate used in the present invention is not particularly limited as long as a back electrode can be formed on the back substrate. In addition, the back substrate may have transparency or may not have transparency, but more preferably does not have transparency. The electronic paper in the present invention usually uses the transparent electrode substrate side as the display surface side. Therefore, in the present invention, when the electronic paper is observed from the transparent electrode base material side, the back base material is disposed on the lower layer side of the display medium layer for displaying information. This is because the background color of the layer arranged in the lower layer of the back substrate or the display portion of the advertising medium is observed, and the information displayed on the electronic paper may be difficult to see.
Moreover, in this invention, you may color a back base material in the same color as one color of the display medium layer mentioned later as needed.

  Such a back base material may be a flexible base material or a rigid base material, but is preferably a flexible base material. This is because the electronic paper in the present invention can be made excellent in workability.

  Such a back substrate may be an inorganic substrate or a resin substrate. Specific examples of the material for the inorganic base material and the resin base material include the inorganic materials and resin materials described in the section of the transparent base material described above.

  In the present invention, a substrate that can be laminated can also be used as the back substrate. About the base material which can be laminated, since it can be made to be the same as that of the item of the transparent base material mentioned above, description here is abbreviate | omitted.

(B) Back electrode The back electrode used in the present invention is formed on a back substrate.

  When the electronic paper performs fixed information display, the back electrode is used as a display electrode and has a pattern shape corresponding to information displayed on the electronic paper.

  Here, the “pattern shape according to information displayed on the electronic paper” means not only the same shape as each piece of information displayed on the display surface of the electronic paper but also a shape corresponding to the background. .

  Further, the pattern shape of the back electrode may be a pattern shape that allows one information to be displayed using one back electrode, and one information is obtained using a plurality of back electrodes. It may be a pattern shape that can be displayed.

  The pattern shape of such a back electrode is not particularly limited, and is appropriately selected according to the use of the electronic paper member of the present invention. Specifically, geometric shapes, letters, numbers, codes, marks, designs, etc., and shapes corresponding to the background can be mentioned. Moreover, as a shape of a back electrode, the shape which comprises 7 segments used for digital display can be mentioned. Further, as the back electrode having a shape corresponding to the background, one back electrode 12b may be used as illustrated in FIG. 2, and although not shown, it may be divided by a plurality of back electrodes. .

  On the other hand, when the electronic paper performs variable information display, for example, when variable information display is performed by passive driving, one of the transparent electrode and the back electrode described above is a scanning (row) electrode, and the other is It shall be used as a signal (column) electrode. Since the shape of the back electrode in this case can be the same as that used in general passive-driven electronic paper, description thereof is omitted here.

  Further, when the electronic paper has a portion for displaying fixed information and a portion for displaying variable information, the back electrode corresponding to each portion has the above-described modes.

  The back electrode is not particularly limited as long as it is made of a conductive material and can display information by using a display medium layer to be described later by applying a voltage to the back electrode. . Such a back electrode may consist only of the back electrode, or may have a back electrode and a back electrode insulating layer.

The material used for such a back electrode is not particularly limited as long as it is a conductive material. For example, metals such as Au, Al, Ag, Ni, and Cu, ITO, SnO ₂ , and ZnO: Examples thereof include a transparent conductor such as Al, and a conductive paste in which a conductive agent is mixed with a solvent or a synthetic resin binder. Examples of the conductive agent include cationic polymer electrolytes such as polymethylbenzyltrimethylammonium chloride and polyallylpolymethylammonium chloride, anionic polymer electrolytes such as polystyrene sulfonate and polyacrylate, and electronically conductive zinc oxide. Tin oxide, indium oxide, carbon fine powder, carbon nanotube, Ag fine powder and the like are used.

When the back electrode has a back electrode insulating layer, a resin layer, an adhesive layer, or the like can be used as the back electrode insulating layer. Since the resin material used for the resin layer can be the same as the resin material used for the transparent substrate described above, the description thereof is omitted here.
On the other hand, a well-known thing can be used about the adhesive agent used for an adhesive bond layer.

In addition, as a method for forming the back electrode, when the back electrode is directly formed on the back substrate, the above-described metal, transparent conductor, and the like using a metal mask or the like, a sputtering method, a vacuum evaporation method, a CVD method, or the like. Examples thereof include a method of forming a thin film on the back substrate by a coating method and the like, a method of applying the pattern on the back substrate by using the conductive paste, and the like.
On the other hand, when forming a back electrode having an insulating layer for a back electrode on a back substrate, for example, a method of cutting a metal foil into a desired pattern and bonding it onto the back substrate using an adhesive or a resin Prepare a resin base material as a layer, and after forming a metal film as a back electrode on the resin base material, cut it into a desired pattern and attach it on the back base material using an adhesive, etc. Can do.

  The film thickness of the back electrode is not particularly limited as long as the image can be displayed with the electronic paper. Specifically, the film thickness is in the range of 50 nm to 500 μm, among others. It is preferably in the range of 100 nm to 100 μm, particularly in the range of 300 nm to 50 μm. If the thickness of the back electrode is less than the above range, it is difficult to form a back electrode having a uniform thickness. If the thickness exceeds the above range, it takes time to form the back electrode. In addition, since a large amount of material for the back electrode is required, the manufacturing cost increases.

(C) Other Configurations The back electrode base material in the present invention is not particularly limited as long as it has the above-described back electrode and back base material, and a necessary configuration can be appropriately selected and added.
An example of such a configuration is wiring.
The wiring is formed to connect the back electrode and a control unit to be described later. When the back electrode has a plurality of pattern shapes according to display, the wiring may be formed so that each back electrode can be controlled by the control unit. Then, it may be formed so that it can be controlled by the control unit.
The wiring may be formed on the back substrate, or may be formed on the wiring insulating layer and disposed on the back substrate. The material of the wiring insulating layer can be the same as the material used for the above-described back electrode insulating layer.

  The material, shape, formation method, and the like of the wiring can be the same as those used for general electronic paper, and thus description thereof is omitted here.

(D) Others The arrangement of the back electrode substrate in the electronic paper is not particularly limited as long as the display medium in the display medium layer can be driven, and the back electrode side of the back electrode substrate is the display medium. It may be arranged so as to face the layer, or may be arranged so that the back substrate side faces the display medium layer. Especially, it is preferable to arrange | position so that a back base material side may oppose a display medium layer. By adopting such an arrangement, the back electrode does not come into direct contact with the display medium layer, so that the material of the back electrode does not elute in the low polarity solvent of the display medium layer. Can be prevented.
Further, the back electrode side of the back electrode substrate has surface irregularities because the back electrode is formed in a pattern. Therefore, by disposing the back electrode substrate so that the back substrate side and the display medium layer face each other, it is possible to prevent display deterioration of the electronic paper due to the surface irregularities.

(3) Display medium layer The display medium layer used for this invention is demonstrated. The display medium layer is disposed between the transparent electrode substrate and the back electrode substrate.

The display medium layer used in the present invention is appropriately selected according to the electronic paper display method of the present invention.
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. In the present invention, those having good weather resistance are preferable, and specifically, a twist ball system is suitably used.

  Here, that the weather resistance of the electronic paper is good means that the temperature range that can be driven is wide, or that there is little fading or influence on driving due to sunlight.

  In the twist ball method, two-color spherical particles (twist balls) having different charging characteristics are changed in phase of any one of two colors by an electric field generated by applying a driving voltage between the back electrode and the transparent electrode. This is a method of displaying information by rotating the twist ball type electronic paper so that it faces the display surface side.

As will be described in detail later, the twist ball method displays images by rotating the twist balls dispersed in the elastomer sheet in the low polarity solvent layer in the display medium layer. Because it is fixed, problems due to aggregation of the display medium are less likely to occur compared to a display system such as an electrophoretic system, that is, a system that performs display by moving charged particles as a display medium in the display medium layer. There is an advantage.
In addition, the display medium layer in the twist ball system has an advantage that a change in electric charge due to moisture in the atmosphere hardly occurs because a constituent material that does not attract moisture such as silicone is used. Therefore, the twist ball system is preferably used in the present invention also from such advantages.

  Hereinafter, the display medium layer in the case where the electronic paper used in the present invention is twist ball electronic paper will be described.

  A display medium layer used for twist ball type electronic paper usually includes a two-color twist ball and a low polarity solvent layer containing a low polarity solvent.

(A) Twist ball The twist ball used in the present invention has two hues having different charging characteristics. In addition, the electronic paper according to the present invention serves as a display medium.

  The twist ball used in the present invention is spherical as long as it has a colored hue and a white hue or two colored hues having different colored hues and colored hues, and the two different hues have different charging characteristics. It is not particularly limited.

  As such a twist ball, for example, the twist ball manufactured by the microchannel manufacturing method proposed in Japanese Patent Application Laid-Open No. 2004-197083 can be used.

  Here, in the microchannel manufacturing method, the colored continuous phase and the spherical particleized phase are in an O / W type or W / O type relationship with each other, and from the first microchannel in which the colored continuous phase is transferred, Charging characteristics of two-color spherical polymer particles and having a positive (±) polarity by sequentially discharging two colored continuous phases into the spherical particle phase of the flowing medium flowing in the second microchannel A manufacturing method for manufacturing a twist ball which is a spherical particle.

  In the above microchannel production method, the polymerizability in a colored continuous phase in which an oily or aqueous fluid medium containing a polymerizable resin component is phase-separated into two colors containing a coloring dye or pigment insoluble in this medium. The resin component is formed with different positively and negatively charged polymerizable monomers, transferred to the first microchannel, and this colored continuous phase is then transferred into the aqueous or oily spherical particleized phase flowing in the second microchannel. In addition, the liquid is sequentially or intermittently discharged. Next, the discharged material discharged into the spherical particle phase is gradually formed into spherical particles during the series of discharge, dispersion, and transfer in the microchannel, and then into spherical particles. A twist ball is appropriately prepared by polymerizing and curing the polymerizable resin component in the particulate phase under UV irradiation and / or heating.

  The colored continuous phase is a continuous hue divided into two hues, for example, black and white, red and white, yellow and white, blue and white, green and white, purple and white, etc. There can be mentioned any two hue separation hues selected from “chromatic hue and white hue” or two hue separation hues different in “color hue and color hue”. The colorant for forming such a hue is appropriately selected and used without particular limitation as long as it is insoluble or uniformly dispersed in a fluid dispersion medium containing a polymerizable resin component described later. As the colorant, dyes and pigments can be used.

  As such dyes and pigments, for example, those described in Japanese Patent Application Laid-Open No. 2004-197083 can be used, and description thereof is omitted here.

  The addition amount of the dyes and pigments as these colorants is not particularly limited, and the desired color tone varies depending on the use of the colored particles, and the dispersibility in the above-described colored continuous phase, etc. From the above, in the present invention, it is 0.1 to 80 parts by weight, preferably 2 to 10 parts by weight per 100 parts by weight of the total polymerizable resin component which is a polymerization and curing component in the colored continuous phase. It can add suitably suitably.

  As the polymerizable resin component or polymerizable monomer used in the twist ball, the chargeability of the twist ball depends on the type of the functional group or substituent of the polymerizable monomer used in the twist ball. Mention may be made of monomer species that tend to exhibit (+) chargeability. Therefore, in the case where at least two or more kinds of monomers are used as the polymerizable resin component in the present invention, the tendency to show the (+) and (−) chargeability is well known, A plurality of monomers having a tendency to property can be used in combination as appropriate.

  On the other hand, in the polymerizable resin component or polymerizable monomer having at least one functional group and / or substituent in the molecule, examples of the functional group or substituent include a carbonyl group, a vinyl group, a phenyl group, and an amino group. Amide group, imide group, hydroxyl group, halogen group, sulfonic acid group, epoxy group and urethane bond. In this invention, it can use suitably suitably combining the monomer type which has a functional group or a substituent in such a polymerizable monomer individually or in combination of 2 or more types.

  As the (−) chargeable monomer and the (+) chargeable polymerizable monomer, for example, those described in JP-A-2004-197083 can be used. The description in is omitted.

  In the present invention, when such a polymerizable monomer at the time of polymerization of the polymerizable resin component after being discharged as a colored continuous phase to the second microchannel already described above is used in combination with another copolymerizable monomer, Depending on the desired chargeability or electrophoretic properties entrusted to the colored resin fine particles, a monomer having a tendency to be charged on a weight basis is preferably in the range of 1% to 100% of the total monomers, and more preferably Can be suitably used as long as it is a copolymer particle with a polymerizable monomer in the range of 5% to 100%, particularly preferably in the range of 10% to 100%, and a desired twist ball can be provided.

  The twist ball is a spherical monodisperse particle having an average particle diameter in a range of 1.0 μm to 400 μm, preferably in a range of 20 μm to 200 μm, more preferably in a range of 50 μm to 50 μm. It can be suitably prepared within the range of 120 μm. In addition, uniform particles with extremely low variation in average particle diameter are appropriately prepared. In the present invention, the homogeneity is expressed as a Cv value, and is suitably used as a twist ball of monodisperse particles of 20% or less, preferably 5% or less, more preferably 3% or less.

(B) Low-polarity solvent layer The low-polarity solvent layer in this invention comprises a display medium layer with a twist ball.
The low polarity solvent layer used in the present invention is not particularly limited as long as it contains a low polarity solvent. The low-polarity solvent layer is usually composed of a low-polarity solvent and an elastomer sheet made of an elastomer material that swells the low-polarity solvent.
Hereinafter, the low polarity solvent used in the low polarity solvent layer and the elastomer sheet will be described.

(I) Low Polarity Solvent The low polarity solvent used in the present invention is used for smooth rotation of the twist ball described above. Moreover, it is usually used by swelling an elastomer sheet described later.

  Such a low polarity solvent is not particularly limited as long as it can be smoothly rotated without hindering the rotation of the twist ball. Examples of such a low polarity solvent include dimethyl silicone oil, isoparaffinic solvents, and linear alkanes such as linear paraffinic solvents, dodecane, and tridecane.

(Ii) Elastomer Sheet The elastomer sheet used in the present invention is made of an elastomer material that can be swollen with the low-polarity solvent. The elastomer sheet is a sheet-like member in which the twist balls are dispersed, and is used by swelling the elastomer sheet with the low polarity solvent.

The material used for such an elastomer sheet is not particularly limited as long as the twist ball can be dispersed and can be swollen with the low polarity solvent.
Examples of the material for such an elastomer sheet include a silicone resin, a slightly crosslinked acrylic resin, a slightly crosslinked styrene resin, and a polyolefin resin.

  Further, the film thickness of the elastomer sheet is not particularly limited as long as the electronic paper in the present invention can display information with a twist ball dispersed in the elastomer sheet, but it is 50 μm to 1000 μm. Within the range, it is particularly preferable to be within the range of 100 μm to 700 μm, particularly within the range of 200 μm to 500 μm. When the film thickness of the elastomer sheet is less than the above range, it is difficult to obtain an elastomer sheet in which the twist balls are uniformly dispersed. When the film thickness of the elastomer sheet exceeds the above range, This is because the twist ball may be prevented from rotating.

(C) Other members The display medium layer in the present invention is not particularly limited as long as it has the twist ball and the low polarity solvent layer, and other necessary members can be added. .
Hereinafter, such a member will be described.

(I) Base material for display medium layer In this invention, as shown in FIG.1 (b), you may have the base material 13c for display medium layers for supporting the display medium layer 13. As shown in FIG. In addition, in FIG.1 (b), although the base material 13c for display medium layers has shown about the example arrange | positioned at both the transparent electrode base material 11 side and the back electrode base material 12 side of the display medium layer 13, illustration is carried out. However, it may be disposed only on either the transparent electrode substrate side or the back electrode substrate side.
Since the strength of the display medium layer 13 can be improved by having the display medium layer base material 13c, the durability of the electronic paper 1 can be improved.

  Further, by having the display medium layer base material, the display medium layer can be handled as a member separate from the transparent electrode base material and the back electrode base material. Therefore, by replacing the back electrode base material, it becomes possible to display different information, so that the display medium layer can be reused.

  As the base material for the display medium layer, the same material as that described in the section of the transparent base material described above can be used. Especially, it is preferable that it can laminate.

  In addition, when using the thing other than the thing which can be laminated as a display medium layer base material, a display medium layer is normally sealed using the sealing agent mentioned later.

  In the case of having a display medium layer base material, the display medium layer base material and the transparent electrode base material or the display medium layer base material and the back electrode base material may be bonded using an adhesive layer or the like, and laminated by laminating. May be. Moreover, as said adhesion layer etc., it is preferable to use the peelable adhesive used for the sticking layer mentioned later. This is because the display medium layer, the transparent electrode base material, and the back electrode base material can be reused.

(Ii) Sealing agent A sealing agent is used when sealing a display medium layer, and is normally arrange | positioned at the edge part of the base material adjacent to a display medium layer.
Such a sealing agent is particularly limited as long as the display medium layer can be sealed together with the base material adjacent to the display medium layer so as to prevent leakage of the low polar solvent in the display medium layer. Not. Specifically, since it can be the same as the sealing agent used for general electronic paper, description here is abbreviate | omitted.

  The “base material adjacent to the display medium layer” specifically refers to either a transparent base material, a back surface base material, or a display medium layer base material used as necessary.

(D) Display medium layer The film thickness of the display medium layer used in the present invention is not particularly limited as long as information display can be performed using a display medium, but within the range of 50 μm to 1000 μm, Especially, it is preferable that it exists in the range of 100 micrometers-700 micrometers, especially in the range of 200 micrometers-500 micrometers. When the film thickness of the display medium layer is less than the above range, the distance between the twist ball and each substrate is small, and therefore it may be difficult for the twist ball to rotate in a desired direction. If the film thickness of the display medium layer exceeds the above range, even if a driving voltage is applied between the back electrode and the transparent electrode, the distance between the twist ball and each substrate is too large. This is because it is difficult to display information using a twist ball in the electronic paper.

In addition, the method for sealing the display medium layer used in the present invention is not particularly limited as long as it can be sealed so as not to cause leakage of a low polar solvent from the display medium layer. Examples thereof include a method of sealing by arranging a sealing agent at the end of the substrate adjacent to the layer, and a method of sealing by laminating using a material that can be laminated on the adjacent substrate.
In the present invention, it is more preferable to seal the display medium layer by laminating. Compared with a sealing method using a sealing agent, it is possible to more suitably prevent a low-polarity solvent from leaking from the display medium layer, and the display region can be made wider. .

(4) Method for Forming Electronic Paper The method for forming electronic paper used in the present invention is not particularly limited, and can be the same as a general method for forming electronic paper, so description thereof is omitted here. .

3. Next, the adhesive layer used in the present invention will be described.
The adhesion layer used for this invention is arrange | positioned on the surface on the opposite side to the electronic paper side of a 2nd protective layer.

  As said sticking layer, what is necessary is just to be able to stick the electronic paper member of this invention to the display part of an advertising medium, and it may be arrange | positioned at the whole surface of a 2nd protective layer, It may be partially arranged.

  As said sticking layer, if it can arrange | position on the surface of a 2nd protective layer and can stick the electronic paper member of this invention on the surface of the display part of an advertising medium, it will be especially limited. However, it is preferable that the electronic paper can be peeled off from the surface of the display portion of the advertising medium. By making the electronic paper member peelable, it is easy to replace the electronic paper member of the display portion of the advertising medium. Therefore, since the advertising medium and the electronic paper can be reused, the advertising medium can be made cost-effective.

  Here, “Peelable” means that when the electronic paper is peeled off after sticking the electronic paper on the surface of the advertising media display using the adhesive layer, the electronic paper and the advertising media display are damaged. It means that the electronic paper can be peeled without being equal.

  Examples of the peelable adhesive layer include a magnet and a peelable adhesive.

Specific examples of peelable adhesives include acrylic adhesives or adhesives, silicone adhesives or adhesives, natural rubber adhesives or adhesives, and ethylene-vinyl acetate (EVA) adhesives. An agent or an adhesive, a urethane-based pressure-sensitive adhesive or an adhesive can be mentioned.
Moreover, when the said adhesive layer consists of an adhesive which can peel, it is preferable to have a peeling layer on the surface on the opposite side to the 2nd protective layer side of an adhesive layer. This is because having the release layer facilitates handling before the electronic paper member of the present invention is stuck on an advertising medium. The release layer is not particularly limited as long as it can be easily peeled off from the adhesive layer and does not cause a defective portion in the adhesive layer, and may be a known one.

  In the present invention, the adhesive layer described above is more preferably made of a magnet. This is because the electronic paper can be easily pasted on the surface of the display portion of the advertising medium. Moreover, it is because a sticking layer can be used repeatedly.

  When the said adhesion layer consists of magnets, an adhesion layer is normally arrange | positioned on the surface by the side of the back electrode base material of electronic paper using an adhesive agent etc.

4). Other Configurations The electronic paper member of the present invention is not particularly limited as long as it has the above-described protective part, electronic paper, and adhesive layer, and a necessary configuration can be appropriately selected and added.

(1) Front light The electronic paper member of the present invention may have a front light on the surface of the first protective layer opposite to the electronic paper. By using the front light, the electronic paper can be used even in a dark environment.

  Examples of the front light include those having a light guide plate and a light source. A general light source can be used as the light source, and specific examples include an LED, a fluorescent lamp, an incandescent lamp, a mercury lamp, and a rod-shaped light guide.

  In addition, examples of the light guide plate include a light guide plate used for a general front light. Specifically, the light guide plate has a reflective base printed with white ink or the like on the surface of a transparent substrate, or a transparent substrate. The thing which formed the fine unevenness | corrugation on the surface of a material, the thing which formed the dot-shaped recessed part in the transparent base material surface, etc. can be mentioned. In the present invention, among them, a light guide plate in which dot-like recesses are formed on the transparent substrate surface can be suitably used. About the transparent base material used for such a light-guide plate, a dot-shaped recessed part shape, a formation method, etc., it can be made to be the same as that of Unexamined-Japanese-Patent No. 2011-228089.

  When the electronic paper member of the present invention has a front light, the first protective layer of the protective portion may also serve as the light guide plate of the front light. In this case, reflective dots are printed on the surface of the first protective layer described above, or fine irregularities, dot-shaped concave portions, and the like are formed on the surface of the first protective layer. In this case, it is preferable that an air layer is provided between the transparent electrode substrate of the electronic paper and the first protective layer from the viewpoint of suppressing light leakage of the front light. Therefore, when bonding a transparent electrode base material and a 1st protective layer, it is preferable to arrange | position and adhere an adhesive partially. It is also preferable to provide a space between the transparent electrode substrate and the first protective layer by bonding the back electrode substrate and the second protective layer.

(2) Control part The electronic paper member of this invention has a control part for controlling the drive voltage normally applied between a back electrode and a transparent electrode. The control unit is usually connected to a transparent electrode or a back electrode via a wiring electrode.

  Since the control unit can be the same as that used in general electronic paper, a description thereof is omitted here.

  Moreover, in this invention, the said control part may have a human sensitive sensor. By having a human sensor, it is possible to change the information displayed on the display surface of the electronic paper according to the distance of a passerby, etc., so that a better alerting function and advertising function can be exhibited. It becomes possible.

  As the human sensor, a publicly known sensor can be used, and the description thereof is omitted here.

(3) Battery power The electronic paper uses power mainly when rewriting displayed information, and uses little power during display. Therefore, since the electronic paper member of the present invention has low power consumption, a battery power source can be used as a power source.

  As a battery used for the battery power source, a general battery such as a solar battery, a storage battery, or a dry battery can be used.

(4) Touch panel The electronic paper member in the present invention may have a touch panel. A touch panel is arrange | positioned at the display surface side of an electronic paper member, and is arrange | positioned at an observer side rather than a 1st protective layer. In this case, the electronic paper in the present invention preferably has a portion for displaying fixed information and a portion for displaying variable information. Thereby, the input by a touch panel and variable information display can be interlocked.
About a touch panel, since a well-known thing can be used generally, description here is abbreviate | omitted.

5. Electronic paper member The display method using the electronic paper member of the present invention is not particularly limited as long as the information displayed on the display surface can be changed over time. For example, a method of increasing or decreasing the number of images, a method of inverting the two-color display, and the like.
In addition, the electronic paper member of the present invention can adjust the display method described above, the time required for display change, and the like. Therefore, for example, in an emergency such as a disaster, an electronic paper member can be used to perform a display different from the normal time, so that the advertising medium can be used for warning or the like. An example of such a display method is a display method in which, when only one background color is used during normal times, the other color is displayed in an emergency, etc., but is not limited thereto. is not.

  As an application of the electronic paper member of the present invention, the electronic paper member is stuck on the surface of a display portion of an advertising medium installed mainly in an outdoor environment. The advertisement medium is not particularly limited as long as it has a display unit to which the electronic paper member described above can be attached, and examples thereof include a signboard, an advertising tower, a building wall surface, and a vehicle surface. it can.

  Further, the material of the display part of the advertising medium is not particularly limited, but when the adhesive layer in the electronic paper member is made of a magnet, the material in which the display part is difficult to attach using a magnet. When it consists of, it is preferable that metal layers, magnets, etc., such as iron, are arrange | positioned in the position corresponding to the adhesion layer of the said display part.

6). The manufacturing method of an electronic paper member It does not specifically limit as a manufacturing method of the electronic paper member of this invention. For example, after forming the electronic paper, a first protective layer is disposed on the surface of the transparent electrode base material, a second protective layer is disposed on the surface of the back electrode base material, and the first protective layer and the second protective layer are disposed. After sealing between layers using a sealing member, the method of manufacturing an electronic paper member can be mentioned by arrange | positioning an adhesive layer on the surface of a 2nd protective layer.

  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.

  Hereinafter, the present invention will be described with reference to examples and comparative examples.

[Example]
(Production of electronic paper members)
A twist ball having an average particle diameter of about 90 μm having a black phase positively charged in black and a white phase negatively charged in white was prepared. This was dispersed in a thermosetting silicone resin, applied onto glass with a coater, and heat-treated to produce a sheet in which 300 μm thick twist balls were dispersed. Next, the sheet was immersed in silicone oil for 24 hours and swollen to obtain a twist ball layer.
Next, a laminate film (laminated film of CPP and PET) (transparent electrode substrate) having an ITO film formed on the PET surface was prepared.
Next, a laminate film (laminated film of CPP and PET) (back electrode substrate) in which an aluminum film (back electrode) was formed on the PET surface according to the display pattern was prepared.
Next, lamination was performed by sandwiching the twist ball layer so that the CPP surface of the transparent electrode substrate and the CPP surface of the back electrode substrate face each other. Thereafter, wiring was performed using a conductive tape and lead wires in accordance with the display pattern.
Next, two acrylic resin plates with a thickness of 1 mm are prepared, one is laminated with an adhesive on the ITO film of electronic paper, and another is made with a thermosetting curable adhesive layer (sealing member). Bonded to the acrylic resin plate. Note that the acrylic resin plate and the pressure-sensitive adhesive arranged in the ITO film mold have transparency. Next, a plate-like magnet was laminated on the back acrylic resin plate via an adhesive.
The electronic paper member was obtained by the above procedure.

[Comparative example]
(Production of electronic paper members)
A twist ball having an average particle diameter of about 90 μm having a black phase positively charged in black and a white phase negatively charged in white was prepared. This was dispersed in a thermosetting silicone resin, applied onto glass with a coater, and heat-treated to produce a sheet in which 300 μm thick twist balls were dispersed. Next, the sheet was immersed in silicone oil for 24 hours and swollen to obtain a twist ball layer.
Next, a laminate film (laminated film of CPP and PET) (transparent electrode substrate) having an ITO film formed on the PET surface was prepared.
Next, a laminate film (laminated film of CPP and PET) (back electrode substrate) in which an aluminum film (back electrode) was formed on the PET surface according to the display pattern was prepared.
Next, lamination was performed by sandwiching the twist ball layer so that the CPP surface of the transparent electrode substrate and the CPP surface of the back electrode substrate face each other. Thereafter, wiring was performed using a conductive tape and lead wires in accordance with the display pattern.
Next, one 1 mm-thick acrylic resin plate was prepared and laminated on an ITO film of electronic paper via an adhesive. Note that the acrylic resin plate and the pressure-sensitive adhesive arranged in the ITO film mold have transparency.

[Evaluation]
The following accelerated weather resistance test was performed on the electronic paper members obtained in Examples and Comparative Examples, and the response speed and contrast of the electronic paper before and after the test were evaluated.
The conditions for the accelerated weathering test include xenon arc lamp irradiance of 60 W / m ² (using a light source in the range of 300 nm to 400 nm), black panel temperature of 63 ° C., and spraying time of 18 minutes / 120 as water spray conditions. Minute irradiation was used. The accelerated weathering test was conducted for 240 hours.
As a result, the electronic paper member of the example had no change in response speed (0.25 seconds) and contrast (1:15) before and after the test, but the electronic paper of the comparative example had a response speed before and after the test. The time was slow from 0.25 seconds to 0.40 seconds, and the contrast was also decreased from 1:15 to 1: 7, confirming the deterioration of the electronic paper member.

DESCRIPTION OF SYMBOLS 1 ... Electronic paper 2 ... Protection part 3 ... Adhesion layer 11 ... Transparent electrode base material 11a ... Transparent base material 11b ... Transparent electrode 12 ... Back electrode base material 12a ... Back surface base material 12b ... Back electrode 13 ... Display medium layer 21 ... 1st protective layer 22 ... 2nd protective layer 23 ... Sealing member

Claims (3)

A transparent electrode substrate having a transparent substrate and a transparent electrode formed on the transparent substrate, a back substrate, a back electrode substrate having a back electrode formed on the back substrate, and the transparent electrode substrate And an electronic paper formed between the back electrode substrate and having a display medium layer including a display medium;
A first protective layer disposed on a surface of the transparent electrode substrate opposite to the display medium layer side; a first protective layer disposed on a surface of the back electrode substrate opposite to the display medium layer side; Two protective layers, and a protective part having a sealing member for sealing between the first protective layer and the second protective layer;
An electronic paper member having an adhesive layer disposed on a surface opposite to the electronic paper side of the second protective layer,
The transparent substrate, the first protective layer, the second protective layer and the back substrate have flexibility,
The electronic paper member, wherein the back electrode has a pattern shape corresponding to a fixed information display as a display electrode.   2. The electronic paper according to claim 1, wherein the display medium layer includes a twisted ball having two hues having different charging characteristics as the display medium, and further includes a low polarity solvent layer including a low polarity solvent. Element.   The electronic paper member according to claim 1, further comprising a front light on a surface of the first protective layer opposite to the electronic paper side.