KR20070022605A - Electrophoresis device and electronic apparatus - Google Patents

Abstract

An object of the present invention is to provide an electrophoretic device capable of narrow frame formation.

A first substrate having a first transparent substrate 10 having a first electrode 12, a second electrode 16, and a protrusion 40 which does not overlap the first substrate in the plate thickness direction. The second substrate 14 which is disposed to face the second substrate, and is electrically connected to the second electrode through the connecting member 24 penetrating the second substrate, and further reaches the protrusion of the second substrate. The wiring pattern 22 provided on one side, the electrophoretic layer 18 interposed between the 1st electrode and the 2nd electrode, the site | part which contact | connects the other surface of a 1st board | substrate, and the excess arrange | positioned around the said site | part A light-transmissive first moisture-proof film 26 having a portion, a portion in contact with the other surface of the second substrate, and an excess portion disposed around the portion, and arranged to expose at least a portion of the protrusion of the second substrate. It is an electrophoretic apparatus provided with the 2nd moisture proof film 28 which becomes.

Electrophoresis device, 1st moisture proof film, wiring pattern

Description

Electrophoretic Device and Electronic Device {ELECTROPHORESIS DEVICE AND ELECTRONIC APPARATUS}

BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is a view showing a cross-sectional structure of an electrophoretic apparatus of the first embodiment.

It is a figure for demonstrating the shape of each of a 1st board | substrate and a 1st moisture proof film.

It is a figure for demonstrating the shape of each of a 2nd board | substrate and a 2nd moisture proof film.

4 is a diagram showing a cross-sectional structure of the electrophoretic apparatus of the second embodiment.

5 is a view showing a cross-sectional structure of an electrophoretic device of a comparative example.

6 shows a cross-sectional structure of the electrophoretic apparatus of the third embodiment.

7 shows a cross-sectional structure of the electrophoretic apparatus of the fourth embodiment.

8 shows a cross-sectional structure of the electrophoretic apparatus of the fifth embodiment.

9 is a perspective view illustrating a specific example of an electronic apparatus to which an electrophoretic device is applied.

Explanation of symbols for the main parts of the drawings

1: electrophoresis device 10: first substrate

12: first electrode 14: second substrate

16: second electrode 18: electrophoretic layer

20: connection electrode 22: wiring pattern

24: Connector 26: First moisture proof film

28: 2nd moisture proof film 30: 1st sealing agent

32: second sealant 40: protrusion

50: external device

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electrophoretic device which uses electrophoresis, in which charged particles in a medium move by application of voltage, to image formation or the like, and to an electronic apparatus provided with the electrophoretic device.

One of the excellent features of the display device using the electrophoresis phenomenon, in particular the microcapsule type electrophoretic display device, is flexible. That is, by using a film such as a resin as two substrates sandwiching the electrophoretic dispersion liquid, it is possible to easily realize a display device having flexibility, and to the electrical equipment such as electronic paper. Applications are expected. On the other hand, when a film is used instead of glass or the like as the substrate, deterioration of the electrophoretic display device due to invasion of moisture becomes a problem. That is, the glass substrate has a high effect of suppressing the ingress of moisture, but in the case of a film substrate, the above effect is low. Therefore, in the case of exposing the electrophoretic display device constructed using the film for a long time under high temperature and high humidity, the moisture is reduced. There is a problem that deterioration occurs due to the intrusion of, and the display quality is significantly reduced. As a solution to this problem, Japanese Unexamined Patent Application Publication No. 2005-114820 (Patent Document 1) and Japanese Unexamined Patent Application Publication No. 2005-114822 (Patent Document 2) include a transparent resin on a substrate (first substrate) on the display surface side. The protective film is laminated, and at the peripheral end surface of the display surface, a water vapor barrier resin layer is provided in the gap between the transparent resin protective film and the substrate (second substrate) on the non-display surface side to block the ingress of moisture. An electrophoretic display device having a structure is disclosed.

However, in the electrophoretic apparatus having the above structure, in order to give a drive signal to the electrophoretic dispersion, a wiring pattern is provided from the inside of the first substrate or the second substrate toward the end portion, and the wiring pattern and the external device at this end portion are provided. It is necessary to electrically connect (voltage application circuit, control circuit, etc.). Specifically, in the peripheral end face of the electrophoretic device, the first substrate or the second substrate is protruded to the outside of the water vapor barrier resin layer so that the wiring pattern at the end of the substrate is exposed to the outside. Is considered. However, in the case of employing such a structure, the width of the peripheral end surface of the electrophoretic device, that is, the width of the frame portion which does not contribute to the display, is the first substrate or the second substrate in order to expose the sealing width by the water vapor barrier resin layer and the wiring pattern. Since the sum of the protruding widths increases, the width of the frame portion is increased. For this reason, it is difficult to satisfy the narrow frame framing requirements of the electrophoretic device, and there is room for further improvement in this respect.

[Patent Document 1] Japanese Unexamined Patent Publication No. 2005-114820

[Patent Document 2] Japanese Unexamined Patent Publication No. 2005-114822

Then, an object of this invention is to provide the electrophoretic apparatus which can achieve narrow frame formation.

According to the first aspect of the present invention, there is provided a light-transmitting first substrate having a first electrode on one side thereof, a second electrode on one side thereof, and a protruding portion not overlapping with the first substrate on the one side in the plate thickness direction. A second substrate disposed to face the first substrate so as to be secured, and electrically connected to the second electrode through a connecting member penetrating the second substrate, and to reach the protrusion of the second substrate. A wiring pattern provided on the other side of the second substrate, an electrophoretic layer interposed between the first electrode and the second electrode, a portion in contact with the other side of the first substrate, and a portion around the portion A light-transmissive first moisture-proof film having an excess portion, a portion in contact with the other surface of the second substrate, and an excess portion arranged around the portion, and further comprising a red portion of the protruding portion of the second substrate. It is an electrophoretic apparatus provided with the 2nd moisture proof film arrange | positioned so that a part may be exposed, and the electrical connection of the said wiring pattern and an external apparatus is aimed at the exposed part of the said projection part of a said 2nd board | substrate.

According to such a structure, since the width | variety (for example, the width | variety which installs a sealing agent) required for sealing for moisture proof, and the width for electrical connection with an external apparatus overlap in the plate thickness direction, such as a 1st board | substrate, By narrowing the width of the frame portion by the amount, narrow frame formation of the electrophoretic device can be achieved.

Preferably, a first sealant is further provided between each of the protrusions of the first moisture resistant film and the second substrate and between the surplus portions of each of the first moisture resistant film and the second moisture resistant film.

Since the width | variety which installs a 1st sealing agent and the width | variety for electrical connection with an external apparatus overlap, the 1st sealing agent can be installed in wider width without impairing the advantage of narrow frame formation. This enables both narrow frame formation and high moisture resistance.

Moreover, it is also preferable to further provide the 2nd sealing agent provided so that the connection part of the said wiring pattern, the said external device, the periphery, and the end surface of the said projection part of a said 2nd board | substrate may be covered.

Thereby, it becomes possible to further heighten a moisture proof effect.

Moreover, it is also preferable that the said excess part of a said 1st moisture proof film, the said excess part of a said 2nd moisture proof film, and the said protrusion part of a said 2nd board | substrate are joined.

In such a configuration, the first sealant described above becomes unnecessary, and the sealing structure can be simplified. Also in this case, since the sealing width can be ensured more widely, both narrow frame formation and high moisture-proof compatibility are attained.

In the above-mentioned case, it is also preferable to further provide the sealing agent provided so that the connection part of the said wiring pattern, the said external device, the periphery, and the end surface of the said projection part of a said 2nd board | substrate may be covered.

Thereby, it becomes possible to improve a moisture proof effect.

This invention of a 2nd form is an electronic device provided with the electrophoretic apparatus mentioned above as a display part. Here, "electronic device" includes all devices having a display unit using display by electrophoretic material, and includes a display device, a television device, an electronic paper, a clock, an electronic calculator, a mobile phone, a portable information terminal, and the like. do. In addition, a deviation from the concept of an "apparatus", for example, belonging to a real estate such as a flexible paper or film-like object, a wall surface to which these objects are attached, and belonging to a mobile body such as a vehicle, a flying vehicle or a ship It may also include.

According to such a structure, the electronic device provided with the high quality display part which is narrow frame shape and moistureproof is compatible.

EMBODIMENT OF THE INVENTION Hereinafter, embodiment of this invention is described, referring drawings.

1 is a diagram showing a cross-sectional structure of the electrophoretic apparatus of the first embodiment. The electrophoretic apparatus 1 shown in FIG. 1 mainly comprises a first substrate 10, a first electrode 12, a second substrate 14, a second electrode 16, an electrophoretic layer 18, and a wiring pattern ( 22), the first moisture proof film 26, the second moisture proof film 28, and the sealant 30, and are electrically connected to the external device 50 including a voltage application circuit, a control circuit, and the like at an end thereof. Connected.

The 1st board | substrate 10 has the 1st electrode 12 which consists of transparent conductive films, such as ITO (tin doped indium oxide) on one surface, and is formed so that the upper surface of the electrophoretic layer 18 may be covered. In this embodiment, a substrate having light transparency and flexibility, such as a transparent insulating synthetic resin substrate, is used as the first substrate 10. In addition, a rigid substrate such as a glass substrate or a relatively thick plastic substrate may be used. 10-200 micrometers is preferable and, as for the thickness of the 1st board | substrate 10, More preferably, it is 25-75 micrometers.

The second substrate 14 has, on one side, a second electrode 16 made of a conductive film such as aluminum, and a protrusion 40 which does not overlap with the first substrate 10 in the plate thickness direction on one side is secured. So as to face the first substrate 10. Specifically, in the electrophoretic apparatus 1 of the present example, as shown in the drawing, the second substrate 14 protrudes to the right side of the drawing from the first substrate 10, and the protruding portion 40 is in the plate thickness direction. It is comprised so that it may overlap with the 1st moisture proof film 26, without overlapping with the 1st board | substrate 10. FIG. In addition, the electrophoretic apparatus 1 of this example is equipped with the some 2nd electrode 16. As shown in FIG. These second electrodes 16 are arranged in a matrix to function as pixel electrodes.

Here, as a flexible substrate which comprises the 2nd board | substrate 14, the resin material excellent in lightweight, flexibility, elasticity, etc. can be used. For example, any of a thermoplastic resin and a thermosetting resin may be sufficient, For example, Polyolefin, cyclic polyolefin, modified polyolefin, polyvinyl chloride, such as polyethylene, a polypropylene, an ethylene propylene copolymer, an ethylene-vinyl acetate copolymer, Polyvinylidene chloride, polystyrene, polyamide, polyimide, polyamideimide, polycarbonate, poly- (4-methylpentene-1), ionomer, acrylic resin, polymethyl methacrylate, acrylic-styrene copolymer, butadiene Polyester, polyether, polyether ketone (PEEK), such as styrene copolymer, polio copolymer (EVOH), polyethylene terephthalate (PET), polybutylene terephthalate (PBT), polycyclohexane terephthalate (PCT) , Polyetherimide, polyacetal, polyphenylene oxide, modified polyphenylene oxide, polyallylate, aromatic polyester Tere (liquid crystal polymer), polytetrafluoroethylene, polyvinylidene fluoride, and other thermoplastic elastomers such as fluororesin, styrene, polyolefin, polyvinyl chloride, polyurethane, fluororubber, and chlorinated polyethylene, Epoxy resins, phenol resins, glassia resins, melamine resins, unsaturated polyesters, silicone resins, polyurethanes, and the like, or copolymers mainly containing them, blends, polymer alloys, and the like, may be mentioned. It can be used in combination (for example, as a laminated body of two or more layers). The thickness of the flexible substrate is about 1 to 500 m, more preferably about 25 to 200 m in terms of mechanical strength and flexibility.

The wiring pattern 22 is electrically connected to the second electrode 16 through a connecting body (via) 24 penetrating through the second substrate 14, and the above-described protrusion of the second substrate 14 ( It is provided in the other surface of the said 2nd board | substrate 14 so that it may reach to 40). This wiring pattern 22 is obtained by patterning a conductive film such as aluminum in a predetermined shape. In addition, the connector 24 is obtained by embedding a conductor such as aluminum in a through hole formed in the second substrate 14.

In addition, although illustration is abbreviate | omitted, the thin film semiconductor circuit layer may be provided in one surface side and / or the other surface side of the 2nd board | substrate 14. FIG. Here, the thin film semiconductor circuit layer includes a wiring group, a pixel electrode group, a pixel driving circuit, a connection terminal, a row decoder for selecting a driving pixel, a column decoder, and the like, each arranged in a row direction and a column direction, respectively. do.

The electrophoretic layer 18 is formed to be interposed between the first electrode 12 and the second electrode 16. The electrophoretic layer 18 comprises a plurality of microcapsules fixed by a binder. The microcapsules contain electrophoretic dispersion medium and electrophoretic particles. The electrophoretic particles have the property of moving in the electrophoretic dispersion medium in accordance with the applied voltage, and one or more kinds of electrophoretic particles are used. The thickness of the electrophoretic layer 18 is about 50 micrometers-75 micrometers, for example. The electrophoretic layer 18 is a method of using a roll coater or a roll laminator on the base material of the resin composition (emulsion or organic solvent solution) obtained by mixing the above-mentioned microcapsules in a binder together with a desired dielectric constant regulator. It can form using well-known coating methods, such as a method of making, a method by screen printing, and a spray method.

Here, as an electrophoretic dispersion medium, it is water, for example; Alcohol solvents such as methanol, ethanol, isopropanol, butanol, octanol, and methyl cellosolve; Various esters such as ethyl acetate and butyl acetate; Ketones such as acetone, methyl ethyl ketone and methyl isobutyl ketone; Aliphatic hydrocarbons such as pentane, hexane and octane; Alicyclic hydrocarbons such as cyclohexane and methylcyclohexane; Aromatic hydrocarbons such as benzene, toluene, xylene, hexyl benzene, halogenated hydrocarbons such as methylene chloride, chloroform, carbon tetrachloride and 1,2-dichloroethane; What mix | blends surfactant etc. with single or these mixtures, such as carboxylate or other various oils, can be used.

As described above, the electrophoretic particles are particles (polymers or colloids) having the property of performing electrophoresis by a potential difference and moving to a desired electrode side in an electrophoretic dispersion medium. For example, black pigments, such as aniline black and carbon black; Azo pigments, such as white pigments, such as titanium dioxide, zincation, antimony trioxide, and aluminum oxide, and monoazo, disazo, and polyazo; Yellow pigments such as isoindolinone, sulfur lead, yellow iron oxide, cadmium yellow, titanium yellow and antimony; Red pigments such as quinacridone red and chromium vermilion; Phthalocyanine blue, indanthrene blue, anthraquinone dyes; Blue pigments such as blue blue, ultramarine blue, and cobalt blue; And green pigments such as phthalocyanine green. These particles may be used alone or in combination of two or more thereof. Furthermore, these pigments include, as necessary, charge control agents composed of particles such as electrolytes, surfactants, metal soaps, resins, rubbers, oils, varnishes, compounds, etc .; Or dispersants such as titanium coupling agents; Lubricants; Stabilizers and the like can be added.

As a material which comprises a microcapsule, it is preferable to use what has flexibility, such as an arabic gum gelatin type compound and a urethane type compound. Microcapsules can be formed using known microencapsulation techniques such as interfacial polymerization, insolubilization, phase separation, or interfacial precipitation. In addition, the microcapsules are preferably uniform in size to exhibit an excellent display function. Microcapsules of almost uniform size can be obtained, for example, by filtration or specific gravity classification. The size of the microcapsules is usually about 30 to 60㎛.

There is no restriction | limiting in particular as a binder as long as it has favorable affinity with a microcapsule, excellent adhesiveness with an electrode, and having insulation. As such a binder, what is illustrated below can be used similarly to the insulating synthetic resin base material mentioned above. For example, polyethylene, chlorinated polyethylene, ethylene-vinyl acetate copolymer, ethylene-ethyl acrylate copolymer, polypropylene, ABS resin, methyl methacrylate resin, vinyl chloride resin, vinyl chloride-vinyl acetate copolymer, vinyl chloride- Vinylidene chloride copolymer, vinyl chloride acrylic ester copolymer, vinyl chloride-methacrylic acid copolymer, vinyl chloride-acrylonitrile copolymer, ethylene-vinyl alcohol-vinyl chloride copolymer, propylene-vinyl chloride copolymer, vinyl chloride Thermoplastic resins such as resin resin, vinyl acetate resin, polyvinyl alcohol, polyvinyl formal, cellulose resin, polyamide resin, polyacetal, polycarbonate, polyethylene terephthalate, polybutylene terephthalate, polyphenylene oxide, Polysulfone, polyamideimide, polyamino bismaleimide, polyethersulfone, poly Polymers, such as a phenylene sulfone, a polyarylate, a grafted polyphenylene ether, a polyether ether ketone, and a polyether imide. Polyethylene fluoride ethylene, polyfluorinated ethylene propylene, tetrafluorinated ethylene-perfluoro alkoxyethylene copolymer, ethylene-4 fluorinated ethylene copolymer, polyvinylidene fluoride, polytrifluoride ethylene chloride, fluorine rubber, etc. Silicon resins, such as a fluororesin, a silicone resin, and a silicone rubber, are mentioned. As another binder material, methacrylic acid-styrene copolymer, polybutylene, methyl methacrylate-butadiene-styrene copolymer, etc. can be used. In addition, as described in, for example, Japanese Unexamined Patent Application Publication No. 10-149118, the binder material preferably makes the dielectric constant of the electrophoretic display liquid and the dielectric constant of the dispersant substantially the same.

The connection electrode 20 is for electrically connecting the first electrode 12 of the first substrate 10 and the wiring pattern and the like (not shown) on one side of the second substrate 14, and the second substrate 14. Is formed on the outer circumferential portion of the ().

The first moisture proof film 26 is attached to the other surface side of the first substrate 10 and plays a role of sealing and protecting the electrophoretic layer 18. This 1st moisture proof film 26 is comprised using what has translucency, such as a polyethylene terephthalate (PET) film, for example. Here, the shape of the 1st moisture proof film 26 is demonstrated using FIG. 2 is a view for explaining the shape of each of the first substrate 10 and the first moisture-proof film 26, the bonding of the first substrate 10 and the first moisture-proof film 26 is a first moisture-proof film ( The typical top view seen from the 26) side is shown. As shown in FIG. 2, the first moisture-proof film 26 (expressed by the texture of the skin of the stomach in the figure) is a frame shape disposed around the site, in addition to the site of contact with the other surface of the first substrate 10. Has an excess of. This surplus portion is used for forming a space for installing the sealant (sealing resin) 30 as described later.

The second moisture proof film 28 is attached to the other surface side of the second substrate 14 to play a role of sealing and protecting the electrophoretic layer 18. This 2nd moisture proof film 28 is comprised using a polyethylene terephthalate (PET) film etc., for example. Here, the shape of the 2nd moisture proof film 28 is demonstrated using FIG. 3 is a view for explaining the shape of each of the second substrate 14 and the second moisture-proof film 28, the bonding of the second substrate 14 and the second moisture-proof film 28 to the second moisture-proof film ( The typical top view seen from the 28) side is shown. As shown in FIG. 3A, the second moisture-proof film 28 (expressed by the double skin texture in the figure) is surrounded by the periphery of the portion, in addition to the portion in contact with the other surface of the second substrate 14. It has an excess part arranged in approximately C letter. This surplus portion is used for forming a space for installing the sealant 30 as described later. In addition, as shown in FIG. 3A, the second moisture proof film 28 is disposed to expose at least a portion (or all) of the protrusion 40 of the second substrate 14. In addition, as shown in FIG. 3B, the cutout portion of the second substrate 14 is provided by providing a cutout portion at one end (the right end in the illustrated example) of the second moisture proof film 28. May be exposed.

The sealant (first sealant) 30 is provided between the first moisture proof film 26 and the protrusion 40 of the second substrate 14, and at the same time, the first moisture proof film 26 and the second moisture proof film (28) It is provided between each surplus part. As this sealing agent 30, an epoxy resin, a silicone resin, an acrylic resin, etc. are used suitably. Moreover, what disperse | distributed inorganic fine particles, such as a silica and an alumina, in these resin is used suitably. These resins may be either a photocurable type, a thermosetting type, or a two-liquid mixed curing type, and have a low viscosity such that bubbles do not enter during filling, and a high viscosity (specifically, about 0.1 to 10 cP) that does not flow out. It is preferable. As a filling method, for example, between the 1st moisture proof film 26 and the 2nd board | substrate 14, or the 1st moisture proof film 26 and the 2nd moisture proof film 28, discharging a suitable quantity with a micro dispenser. The method of charging in between can be employ | adopted. In order to avoid the mixing of bubbles as much as possible, it is also preferable to work in a vacuum state (low pressure state).

The electrophoretic apparatus 1 of the present embodiment has the configuration as described above, and as shown, the wiring pattern 22 and the external device 50 at the exposed portions of the protrusions 40 of the second substrate 14. ) Electrical connection is planned. Here, the external device 50 is a flexible printed wiring circuit (FPC) board | substrate, for example. The connection of the wiring pattern 22 and the external device 50 is performed by bonding them together, for example through an anisotropic conductive film (not shown).

4 is a diagram showing a cross-sectional structure of the electrophoretic apparatus of the second embodiment. The electrophoretic display device 1a shown in FIG. 2 has a configuration substantially the same as the electrophoretic device 1 of the first embodiment described above, except that a sealant (second sealant) 32 is further added. In addition, after attaching | subjecting the same code | symbol about the component which is common to both, detailed description is abbreviate | omitted. As shown in FIG. 4, the sealant 32 is provided so as to cover at least the connection location of the wiring pattern 22 and the external device 50, its periphery, and the end face of the protrusion 40 of the second substrate 14. . The sealing agent 32 of the example shown is further provided so that the cross section of the sealing material 30 and sectional drawing of the 1st moisture proof film 26 may be covered. As the sealant 32, an epoxy resin, a silicone resin, an acrylic resin or the like is suitably used similarly to the sealant 30 described above.

5 is a view showing a cross-sectional structure of the electrophoretic device of the comparative example. In the electrophoretic display device of the comparative example shown in FIG. 5, the wiring provided on one surface side of the second substrate 14 by causing the second substrate 14 to protrude outward from the sealant 30 in the peripheral end surface portion. It has a structure which exposes the pattern 122 to the exterior, and the structure other than that is substantially the same as the electrophoresis apparatus of 1st or 2nd Example mentioned above. In the electrophoretic apparatus of the comparative example, the width of the frame portion is at least the sum of the width L1 of the sealant 30 necessary for moisture proof and the width L2 necessary for the electrical connection of the external device 50. (L1 + L2) is required. In contrast, in the electrophoretic apparatus of the first or second embodiment, as can be seen in FIG. 1 or FIG. 4, the width of the sealant 30 necessary for moisture proof and the electrical connection with the external device 50 are provided. Since the widths overlap, the width of the frame portion can be made smaller by that amount, so that narrow frame can be achieved. In other respects, if the width of the frame portion of the electrophoretic device of the comparative example is to be about the same as that of the present embodiment, as shown in Fig. 5, the width L1 of the sealant 30 needs to be made smaller, and the moisture resistance thereof is that much. This will fall. That is, in the electrophoretic apparatus of this embodiment, when the allowable frame width is made constant, the width L1 of the sealant 30 can be more secured than the electrophoretic apparatus of the comparative example, and the moisture resistance can be improved. .

Hereinafter, another embodiment of the electrophoretic apparatus to which the present invention is applied is further described.

6 is a diagram showing a cross-sectional structure of the electrophoretic apparatus of the third embodiment. The electrophoretic display device 1b shown in FIG. 3 has a structure substantially the same as that of the electrophoretic device 1 of the first embodiment described above, and the connection structure between the wiring pattern 22 and the external device 50 is slightly different. In addition, after attaching | subjecting the same code | symbol about the component which is common to both, detailed description is abbreviate | omitted. In the electrophoresis apparatus 1b shown in FIG. 6, the 2nd moisture proof film 28b is provided so that the other surface of the 2nd board | substrate 14 may be substantially covered and it is inner side rather than the edge part in the part which contact | connects the protrusion part 40. FIG. Has a cutout portion 42. This cutout part 42 is comprised by cutting out a part of 2nd moisture proof film 28b to window shape, and functions to expose a part of wiring pattern 22. As shown in FIG. The external device 50 is electrically connected to the wiring pattern 22 through the conductive connector 34 disposed inside the cutout portion 42. Here, as the conductive connector 34, for example, an anisotropic conductive film is used. Also with this type of electrophoretic device 1b, the same effects as those of the electrophoretic device 1 of the first embodiment can be obtained.

7 is a diagram showing a cross-sectional structure of the electrophoretic apparatus of the fourth embodiment. The electrophoretic display device 1c shown in FIG. 7 has a configuration substantially the same as that of the electrophoretic device 1b of the third embodiment described above, except that a sealant (second sealant) 32b is further added. In addition, after attaching | subjecting the same code | symbol about the component which is common to both, detailed description is abbreviate | omitted. As shown in FIG. 7, the sealing agent 32b is provided so that the connection part of the wiring pattern 22 and the external device 50 at least may be covered, and the end surface of the periphery part 40 of the 2nd board | substrate 14 may be provided. . The sealing agent 32b of the example shown is further provided so that the cross section of the sealing material 30 and sectional drawing of the 1st moisture proof film 26 may be covered. As the sealant 32, an epoxy resin, a silicone resin, an acrylic resin or the like is suitably used similarly to the sealant 30 described above. Also with this type of electrophoretic device 1c, the same effect as that of the above-mentioned electrophoretic device 1a of the second embodiment can be obtained.

8 is a diagram showing a cross-sectional structure of the electrophoretic apparatus of the fifth embodiment. The electrophoretic display device 1d shown in FIG. 8 has the same configuration as the electrophoretic device 1 of the above-described first embodiment, omits the sealant 30, and the first moisture proof film 26 and the second. The point which directly bonds the board | substrate 14 or the 2nd moisture proof film 28 differs. In addition, after attaching | subjecting the same code | symbol about the component which is common to both, detailed description is abbreviate | omitted. More specifically, as shown in FIG. 8, the surplus part (refer FIG. 2) of the 1st moisture proof film 26 is directly bonded by the protrusion part 40 of the 2nd board | substrate 14. As shown in FIG. Similarly, the surplus part (refer FIG. 2) of the 1st moisture proof film 26 is directly bonded with the surplus part (refer FIG. 3) of a 2nd moisture proof film. An epoxy resin adhesive is used for joining, for example. In addition, as shown in FIG. 8, the sealing agent 32d covers at least the connection part of the wiring pattern 22 and the external device 50, its periphery, and the cross section of the protrusion part 40 of the 2nd board | substrate 14. FIG. Is installed. The sealing agent 32d of the example shown is further provided so that sectional drawing of the 1st moisture proof film 26 and the 2nd moisture proof film 28 may be covered. As the sealant 32d, an epoxy resin, a silicone resin, an acrylic resin, or the like is suitably used similarly to the sealant 30 described above. Also with this type of electrophoretic device 1d, the same effects as those of the electrophoretic device 1 of the above-described first embodiment can be obtained. That is, since the sealing width | variety of the 1st moisture proof film 26 and the 2nd moisture proof film 28 which are necessary for moisture proof, and the width for electrical connection with the external device 50 overlap, the width | variety of a frame part only by the quantity It is possible to achieve a narrow frame with a smaller size.

Next, a specific example of an electronic apparatus including the electrophoretic device according to each of the above-described embodiments will be described.

9 is a perspective view illustrating a specific example of an electronic apparatus to which the electrophoretic device is applied. 9A is a perspective view illustrating an electronic book that is an example of an electronic device. The electronic book 1000 has a book-shaped frame 1001, a cover 1002 rotatably provided (openable) with respect to the frame 1001, an operation unit 1003, and electrophoresis according to the present embodiment. The display part 1004 comprised by the apparatus is provided. 9B is a perspective view illustrating a wrist watch that is an example of an electronic device. This wrist watch 1100 has a display portion 1101 constituted by an electrophoretic device according to the present embodiment. 9C is a perspective view illustrating electronic paper as an example of an electronic device. The electronic paper 1200 includes a main body portion 1201 composed of a rewritable sheet having a texture and flexibility such as paper, and a display portion 1202 composed of the electrophoretic apparatus according to the present embodiment. have. In addition, the range of the electronic apparatus which can apply an electrophoretic apparatus is not limited to this, Comprising: It includes the apparatus using the change of the visual color tone according to the movement of a charged particle widely. For example, in addition to the apparatus described above, one belonging to a real estate such as a wall surface on which an electrophoretic film is attached may also belong to a moving object such as a vehicle, a vehicle, a ship, and the like.

In addition, this invention is not limited to the content of the above-mentioned Example, A various deformation | transformation is possible within the scope of the summary of this invention. For example, in the above-described embodiment, a type using microcapsules as an example of the electrophoretic layer has been described. For example, an electrophoretic dispersion liquid is enclosed in each of a plurality of cells (small spaces) constructed by using a partition wall. It is also possible to use other types of electrophoretic layers, such as type.

According to the present invention, it is possible to provide an electrophoretic device capable of narrow frame formation.

Claims (6)

A translucent first substrate having a first electrode on one side; A second substrate having a second electrode on one side, and having a protrusion formed at one end thereof so as not to overlap with the first substrate in the plate thickness direction, the second substrate being opposed to the first substrate; A wiring pattern electrically connected to the second electrode through a connecting body penetrating through the second substrate and provided to the protruding portion of the second substrate, the wiring pattern being provided on the other side of the second substrate; An electrophoretic layer interposed between the first electrode and the second electrode, A first light-permeable moisture proof film having a portion in contact with the other surface of the first substrate and an excess portion disposed around the portion; And a second moisture proof film having a portion in contact with the other surface of the second substrate and an excess portion disposed around the portion, and provided to expose at least a portion of the protrusion of the second substrate, The electrophoretic apparatus which electrically connects the said wiring pattern and an external apparatus in the exposed part of the said protrusion part of the said 2nd board | substrate. The method of claim 1, And a first sealant provided between the protruding portions of the first moisture resistant film and the second substrate and between the surplus portions of each of the first moisture resistant film and the second moisture resistant film. The method of claim 2, The electrophoretic apparatus further provided with the 2nd sealing agent provided so that the connection part of the said wiring pattern and the said external apparatus, the periphery, and the end surface of the said projection part of a said 2nd board | substrate may be covered. The method of claim 1, The electrophoretic apparatus formed by bonding the said excess part of a said 1st moisture proof film, the said excess part of a said 2nd moisture proof film, and the said protrusion part of a said 2nd board | substrate. The method of claim 4, wherein The electrophoretic apparatus further provided with the sealing agent provided so that the connection part of the said wiring pattern and the said external apparatus, the periphery, and the end surface of the said projection part of a said 2nd board | substrate may be provided. An electronic device comprising the electrophoretic device according to any one of claims 1 to 5.

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