JP5549287B2 - Electrophoretic display device, electrophoretic sheet and electronic device - Google Patents

Description

 The present invention relates to an electrophoretic display device, an electrophoretic sheet, and an electronic apparatus.

A flat display device typified by a liquid crystal display device is used in various fields such as office automation equipment, information terminals, watches, and televisions by making use of features such as thinness, light weight, and low power consumption. Currently, these mobile phones and other devices are required to be thinner, lighter and more durable.
On the other hand, although it is inferior to a liquid crystal display device in terms of color display and moving image display, an electrophoretic display (EPD) has a property close to that of paper as a display body that can realize thinness, lightness and low power consumption. Development is progressing as "electronic paper" for the purpose of reading.

A microcapsule type EPD, which is a typical electronic paper, encloses a solvent in which charged particles are dispersed in a microcapsule and applies an electric voltage to electrodes formed above and below the microcapsule to generate an electric field. It is a display body that obtains contrast by changing the distribution. Even when the voltage application is stopped, the charged particles attracted by the electrostatic force or intermolecular force remain in the vicinity of the electrode, so that the display image can be held without consuming power.
In addition, it does not depend on transmitted light like a liquid crystal display or light emission like an organic EL display, but looks at the color (reflected light) of charged particles and the solvent itself, so it has no viewing angle dependence and is gentle on the eyes like paper. It has the advantage of being able to withstand time staring.

  The ease of viewing like paper, which is a feature of electrophoretic displays, is a so-called reflective display that observes the reflected light from charged particles, so it is extremely advantageous for use under sunlight. It is. However, when the usage environment is assumed to be outdoor, there is a concern about deterioration due to temperature and humidity changes, and thus sufficient moisture resistance is required.

 In order to solve this problem, a structure is proposed in which protective films are arranged above and below the electrophoretic layer and moisture-proof resin is arranged around the electrophoretic layer in order to prevent moisture intrusion into the electrophoretic layer as disclosed in Patent Document 1. ing.

JP 2007-72128 A

However, in the above configuration, the cross-sectional area of the sealing region of the moisture-proof resin that becomes the moisture diffusion path is also devised, but in order to ensure sufficient moisture-proof property with this structure, the moisture-proof resin material itself is used. In addition to sufficient moisture resistance, strong adhesion to upper and lower protective films is also required. If the adhesion between the protective film and the moisture-proof resin is insufficient, the restoring force generated by the rigidity of the protective film becomes the interfacial peeling force, which increases the molecular spacing of the moisture-proof resin in the vicinity of the moisture-proof sheet or causes the interface peeling. May become a moisture diffusion path and enter the electrophoretic layer to change the display state of the EPD.
Then, the device which further forms the sealing part which covers an outer edge and reduces interface peeling by the restoring force of a film is also made | formed. However, this structure has a problem that the sealing width is widened, the peripheral non-display area is enlarged, and the merchandise of the electronic paper is remarkably impaired.

  The present invention has been made in view of the above-described problems of the prior art, and an object of the present invention is to provide an electrophoretic display device and an electronic apparatus having sufficient moisture resistance without enlarging the peripheral non-display area. I am trying.

The electrophoretic display device of the present invention includes a substrate, a support layer disposed opposite to the substrate, an electrophoretic layer disposed between the substrate and the support layer, and the electrophoretic layer of the support layer. Is bonded to the adhesive layer disposed on the opposite surface, the first protective film disposed on the outer surface side of the substrate, and the first protective film disposed on the outer surface side of the adhesive layer. A second protective film for sealing the electrophoretic layer, wherein the adhesive layer is provided so as to wrap around at least the side surface of the support layer, and is folded back so as to wrap around the side surface of the support layer. Further, the first protective film or the second protective film is attached to the folded portion of the adhesive layer .

  According to the present invention, the adhesive layer for adhering and holding the second protective film disposed on the surface of the support layer opposite to the electrophoretic layer is disposed so as to wrap around the side surface of the support layer. By the adhesive layer also serving as an adhesive holding of the protective film disposed on the side surface of the electrophoretic layer, it becomes possible to prevent moisture from entering the electrophoretic layer with a very narrow sealing width. That is, an electrophoretic display device having a remarkably narrow frame can be realized as compared with a structure using a moisture-proof resin around the periphery or a structure in which a sealing portion that covers the outer edge is formed after the protective films are bonded together.

In addition, it is preferable that the first protective film and the second protective film are attached to a folded portion of the adhesive layer that is folded so as to wrap around the side surface of the support layer .

According to the present invention, the first protective film is attached to the folded portion of the adhesive layer that is folded so as to wrap around the side surface of the electrophoretic layer, and the first protective film and the second protective film are The films are bonded and held by the same adhesive layer, and peeling of the films is prevented.
In this way, the adhesive layer also serves to adhere and hold the protective film disposed on the side surface of the electrophoretic layer, thereby improving the moisture resistance of the electrophoretic layer while realizing a narrow frame width.

Moreover, it is preferable that either one of an adhesive layer and the said 2nd protective film has moisture resistance.
According to the present invention, since either the adhesive layer or the second protective film has moisture resistance, the moisture resistance on the element substrate side even when the element substrate is made of a material that does not have moisture resistance. Can be secured. Thus, electrophoresis can be performed without increasing the frame width without enlarging the sealing width of the sealing portion in order to ensure the sealing performance by the pair of protective films that seal the display panel as in the conventional configuration. Sufficient moisture resistance for the layer can be ensured. In addition, since either one of the adhesive layer and the second protective film has moisture resistance, an inexpensive adhesive layer or protective film that does not have moisture resistance can be used for the other. Thereby, the cost concerning a structural member can be reduced.

The electrophoretic sheet of the present invention includes a transparent substrate, an electrophoretic layer disposed on the transparent substrate, an adhesive support layer disposed on a surface of the electrophoretic layer opposite to the transparent substrate, A first protective film disposed on the outer surface side of the transparent substrate, and a second protection that seals the electrophoretic layer by being bonded to the first protective film disposed on the outer surface side of the adhesive support layer. A folded portion of the adhesive support layer that is folded back so as to wrap around the side surface of the electrophoretic layer. The first protective film is affixed to.

  According to the present invention, the adhesive support layer is disposed on the surface opposite to the electrophoretic layer, and is disposed so that the adhesive support layer for adhering and holding the second protective film wraps around the side surface of the electrophoretic layer. This adhesive support layer also serves to adhere and hold the first protective film disposed on the side surface of the electrophoretic layer, thereby preventing moisture from entering the electrophoretic layer with an extremely narrow sealing width. It becomes. That is, there is an effect in that an electrophoretic display device having a narrow frame can be realized as compared with a structure using a moisture-proof resin in the periphery and a structure in which a sealing portion covering an outer edge is formed after bonding protective films together.

Moreover, it is preferable that the said adhesive support layer is provided so that the said transparent substrate may be contact | connected.
According to the present invention, since the first protective film is attached to the folded portion of the adhesive support layer that is folded so as to wrap around the side surface of the electrophoretic layer, the first protective film and the second protective film are attached. The film is adhered and held by the same adhesive layer, and peeling between the films is prevented.
In this way, the adhesive layer also serves to adhere and hold the protective film disposed on the side surface of the electrophoretic layer, thereby improving the moisture resistance of the electrophoretic layer while realizing a narrow frame width.

Moreover, it is preferable that the electrophoretic layer has a plurality of microcapsules, and an adhesive support layer is attached to the plurality of microcapsules.
Conventionally, an electrophoretic sheet is generally provided with an adhesive layer for adhering to an element substrate, but the adhesive support layer of the present invention supports the electrophoretic layer instead of the element substrate and has an adhesive function. Therefore, it also has a function as the adhesive layer. As a result, the adhesive layer can be omitted, the manufacturing can be facilitated, and the electrophoretic sheet can be thinned.

Moreover, it is preferable that the adhesive support layer has moisture resistance.
According to the present invention, since the adhesive support layer has moisture resistance, an inexpensive film having no moisture resistance can be used as the second protective film. Thereby, the cost concerning a film can be reduced.

The electrophoretic display device of the present invention includes the electrophoretic sheet described above and a pair of protective films that cover the electrophoretic sheet and seal the electrophoretic sheet.
Since the electrophoretic display device of the present invention includes the electrophoretic sheet of the present invention described above, it becomes a display portion excellent in moisture resistance in which peeling of the protective films is prevented. Thereby, sufficient moisture resistance can be secured without enlarging the peripheral non-display area.
Therefore, it is possible to provide an electrophoretic display device capable of realizing a narrow frame while ensuring sufficient moisture resistance for the electrophoretic element.

  An electronic apparatus according to the present invention includes the electrophoretic display device according to the present invention described above.

  According to the present invention, it is possible to provide an electronic apparatus with excellent reliability by including a display unit that can realize a narrow frame while ensuring sufficient moisture resistance for the electrophoretic element.

(A) The fragmentary sectional view which shows schematic structure of an electrophoretic display apparatus, (b) Sectional drawing which shows schematic structure of a microcapsule. Sectional drawing which shows the modification of 1st Embodiment. The fragmentary sectional view which shows schematic structure of the electrophoretic display device of 2nd Embodiment. The fragmentary sectional view which shows schematic structure of the electrophoretic display device of 3rd Embodiment. The fragmentary sectional view which shows the modification of the electrophoretic display device of 3rd Embodiment. The top view which shows the modification of a protective film. FIG. 14 illustrates an example of an electronic device. FIG. 14 illustrates an example of an electronic device. FIG. 14 illustrates an example of an electronic device.

  Embodiments of the present invention will be described below with reference to the drawings. In each drawing used for the following description, the scale of each member is appropriately changed to make each member a recognizable size.

[First Embodiment]
Hereinafter, the configuration of the electrophoretic display device of the present invention will be described with reference to the drawings.
FIG. 1A is a partial cross-sectional view showing a schematic configuration of an electrophoretic display device, and FIG. 1B is a cross-sectional view showing a schematic configuration of a microcapsule.
In the electrophoretic display device 100, the electrophoretic panel 2 in which an electrophoretic layer 31 in which a plurality of microcapsules 20 are arranged is sandwiched between a transparent substrate 14 and an element substrate 15 includes a pair of protective films 12 and 13. It is the structure sealed by.

The element substrate 15 is a substrate made of glass and does not have to be transparent because it is disposed on the side opposite to the image display surface. On the surface of the element substrate 15, a circuit layer (not shown) in which selection transistors (not shown), scanning lines, data lines, and the like are formed is formed, and pixel electrodes 35 are formed on the outermost layer of the circuit layer. Has been. The pixel electrode 35 is a transparent electrode formed of MgAg, ITO, IZO (indium / zinc oxide), or the like.
In the present embodiment, a non-alkali glass AN100 (manufactured by Asahi Glass Co., Ltd.) having a thickness of 100 μm is used as the element substrate 15.

  On the other hand, the transparent substrate 14 is a substrate made of glass, plastic, or the like, and is a transparent substrate because it is disposed on the image display side. A common electrode (not shown) facing the plurality of pixel electrodes 35 is formed on the electrophoretic layer 31 side of the transparent substrate 14, and the electrophoretic layer 31 is provided on the common electrode. The common electrode is an electrode that applies a voltage to the electrophoretic layer 31 together with the pixel electrode 35, and is a transparent electrode made of MgAg (magnesium silver), ITO (indium tin oxide), IZO (indium zinc oxide), or the like. Electrode.

  The electrophoretic layer 31 is generally handled as an electrophoretic sheet by the transparent substrate 14 and the plurality of microcapsules 20 fixed on the transparent substrate 14. In the manufacturing process, the electrophoretic sheet is handled in a state where a protective release sheet is attached to the surface of the adhesive layer 33. And the display part 7 is formed by sticking the electrophoretic sheet which peeled off the release sheet with respect to the element substrate 15 (The pixel electrode 35, various circuits, etc.) which were manufactured separately. The thickness of the electrophoretic layer 31 in this embodiment is about 230 μm.

  As shown in FIG. 1B, the microcapsule 20 has a particle size of, for example, about 50 μm, and includes a dispersion medium 21, a plurality of white particles (electrophoretic particles) 27, and a plurality of black particles. (Electrophoretic particles) 26 and a spherical body encapsulating the particles. The microcapsule 20 is sandwiched between the common electrode and the pixel electrode 35, and one or a plurality of microcapsules 20 are arranged in one pixel 40.

The outer shell (wall film) of the microcapsule 20 is formed using a transparent polymer resin such as acrylic resin such as polymethyl methacrylate and polyethyl methacrylate, urea resin, and gum arabic.
The dispersion medium 21 is a liquid that disperses the white particles 27 and the black particles 26 in the microcapsules 20. Examples of the dispersion medium 21 include water, alcohol solvents (methanol, ethanol, isopropanol, butanol, octanol, methyl cellosolve, etc.), esters (ethyl acetate, butyl acetate, etc.), ketones (acetone, methyl ethyl ketone, methyl isobutyl ketone, etc.). ), Aliphatic hydrocarbons (pentane, hexane, octane, etc.), alicyclic hydrocarbons (cyclohexane, methylcyclohexane, etc.), aromatic hydrocarbons (benzene, toluene, benzenes having a long-chain alkyl group ( Xylene, hexylbenzene, hebutylbenzene, octylbenzene, nonylbenzene, decylbenzene, undecylbenzene, dodecylbenzene, tridecylbenzene, tetradecylbenzene)), halogenated hydrocarbons (methylene chloride, chloroform, tetrachloride) Element, and 1,2-dichloroethane), can be exemplified a carboxylate, it may be other oils. These substances can be used alone or as a mixture, and a surfactant or the like may be further blended.

The white particles 27 are particles (polymer or colloid) made of a white pigment such as titanium dioxide, zinc white, and antimony trioxide, and are used, for example, by being negatively charged. The black particles 26 are particles (polymer or colloid) made of a black pigment such as aniline black or carbon black, and are used by being charged positively, for example.
These pigments include electrolytes, surfactants, metal soaps, resins, rubbers, oils, varnishes, compound charge control agents, titanium-based coupling agents, aluminum-based coupling agents, silanes as necessary. A dispersant such as a system coupling agent, a lubricant, a stabilizer, and the like can be added.
Further, instead of the black particles 26 and the white particles 27, for example, pigments such as red, green, and blue may be used. According to such a configuration, red, green, blue, or the like can be displayed on the display unit 7.

  The electrophoresis panel 2 having such a structure is covered with a pair of protective films 12 and 13 as shown in FIG.

  The protective films 12 and 13 have a shape larger than the area of the electrophoretic panel 2 in plan view, and the peripheral portions 12 a and 13 a project from the electrophoretic panel 2. The protective film 12 is disposed on the outer surface of the transparent substrate 14 (the surface opposite to the electrophoretic layer 31) on the image display surface side of the electrophoretic panel 2, and is attached to the transparent substrate 14 via an adhesive layer (not shown). It is pasted together. The protective film 13 (one protective film) is disposed on the outer surface of the element substrate 15 (the surface opposite to the electrophoretic layer 31), and is bonded to the element substrate 15 via an adhesive layer 11 described later.

The protective film 12 disposed on the transparent substrate 14 side is a multi-layer film type protective film in which a plurality of films formed with inorganic films are laminated via an adhesive, such as silica or alumina. A film to which moisture resistance is added by forming a transparent and moisture-proof inorganic film on an organic film such as polycarbonate or PET is used.
On the other hand, as the protective film 13 disposed on the element substrate 15 side, since the element substrate 15 itself made of glass has moisture resistance, a film having no moisture resistance can be used.

  The protective films 12 and 13 are bonded together via an adhesive layer 17 in which the peripheral edge portions 12a and 13a are disposed between them. Examples of the adhesive layer 17 include a thermoplastic adhesive such as an ethylene methacrylic acid copolymer hot melt agent, a thermosetting adhesive such as an epoxy adhesive, or a UV effect adhesive such as an acrylic adhesive. Is appropriately selected.

Such protective films 12 and 13 are preferably bonded together by vacuum lamination. Thereby, it can paste together without a gap, without enclosing air etc.
Here, the end portion (peripheral portion) of the protective film 12 is folded back toward the side surface 31 c of the electrophoretic layer 31 and bonded to the end portion (peripheral portion) of the protective film 13.

  The adhesive layer 11 is disposed between the element substrate 15 and the protective film 13 of the electrophoresis panel 2 and covers the entire outer surface 15b of the element substrate 15 (the surface opposite to the electrophoresis layer 31 of the element substrate 15). Yes. The adhesive layer 11 is provided so as to wrap around from the outer surface 15b of the element substrate 15 to the side surface 15c. In this embodiment, the adhesive layer 11 is provided on the entire side peripheral surface of the element substrate 15. The folded portion of the protective film 12 disposed on the display surface side is bonded to the folded portion 11 a of the adhesive layer 11.

  In the present embodiment, only the protective film 12 is bonded on the folded portion 11a of the adhesive layer 11, but as shown in FIG. 2, not only the protective film 12 but also the end of the protective film 13 is on the folded portion 11a. It may be pasted.

  The adhesive layer 11 is made of a double-sided adhesive film, and is preferably formed using a material close to the linear expansion coefficient of the element substrate 15 (glass in this embodiment). The thickness of the adhesive layer 11 is about 50 μm. The adhesive layer 11 preferably has moisture resistance. Thereby, the moisture-proof property with respect to the electrophoretic layer 31 is further improved by the protective film 12 having the moisture-proof property and the adhesive layer 11.

  Thus, the electrophoretic display device 100 of the present embodiment is configured.

According to the electrophoretic display device 100 of the present embodiment, the adhesive layer 11 for adhering and holding the protective film 13 on the lower surface (element substrate 15) side of the electrophoretic panel 2 is disposed on the side surface of the electrophoretic panel 2. By also serving as an adhesive holding of the film 12, it is possible to prevent moisture from entering the microcapsule 20 with a very narrow sealing width. In other words, the electrophoretic display device 100 having an extremely narrow frame can be realized as compared with a structure using a moisture-proof resin in the periphery and a structure in which a sealing portion covering the outer edge is formed after the protective films 12 and 13 are bonded to each other. is there.
Moreover, in this embodiment, since the protective film 12 is affixed on the folding | returning part 11a of the contact bonding layer 11 folded so that it might wrap around the side surface of the electrophoresis panel 2, the upper and lower protective films 12 and 13 are the same. It will be adhered and held by the adhesive layer 11, and peeling of the films will be prevented.
In this way, the adhesive layer 11 also serves to adhere and hold the protective film 12 disposed on the side surface of the electrophoretic layer 31, so that a narrow frame can be realized while ensuring sufficient moisture resistance for the electrophoretic panel 2. An electrophoretic display device 100 can be provided.

[Second Embodiment]
Next, an electrophoretic display device according to a second embodiment will be described.
FIG. 3 is a partial cross-sectional view showing a schematic configuration of the electrophoretic display device of the second embodiment.
As shown in FIG. 3, the basic configuration of the electrophoretic display device 200 of this embodiment is the same as that of the previous embodiment, but the element substrate 25 is made of plastic, and the protective film 23 on the element substrate 25 side is moisture-proof. Is different in that it has

  In the embodiment described above, an element substrate made of a glass substrate is used, but in the present embodiment, a plastic substrate is used as the element substrate 25. The element substrate 25 made of a plastic substrate does not have a high moisture-proof property like a glass substrate. For this reason, as the protective film 23 (second protective film) covering the element substrate 25 side, a plurality of films on which inorganic films are formed are adhesives like the protective film 12 covering the transparent substrate 14 side. A multilayer film type protective film that is laminated via, for example, adding moisture-proof performance by forming a transparent and moisture-proof inorganic film such as silica or alumina on an organic film such as polycarbonate or PET Film is used.

According to the configuration of this embodiment, even when the electrophoretic panel 2 is configured using a substrate having low moisture-proof properties such as plastic as the element substrate 25, the protective film 12 having moisture-proof properties as a protective film for sealing, By using 23, it is possible to ensure sufficient moisture resistance for the electrophoretic layer 31.
In addition, the plastic substrate is lighter than the glass substrate, and the weight of the electrophoretic display device can be reduced.

[Third Embodiment]
Next, an electrophoretic display device 300 according to a third embodiment will be described.
FIG. 4 is a partial cross-sectional view illustrating a schematic configuration of the electrophoretic display device of the third embodiment.
As shown in FIG. 4, the electrophoretic display device 300 according to the present embodiment includes an electrophoretic layer 31 composed of a plurality of microcapsules 20 and an adhesive attached on the electrophoretic layer 31 (the plurality of microcapsules 20). An electrophoretic sheet 50 having an adhesive layer 33 and an adhesive support layer 41 attached to the surface of the adhesive layer 33 opposite to the electrophoretic layer 31 is provided. It is configured to be sealed by a pair of protective films 12 and 23 having moisture-proof performance.

 In the present embodiment, the folded portion 41a of the adhesive support layer 41 covers the entire surface of the adhesive layer 33 opposite to the electrophoretic layer 31, and not only the side surface 33c of the adhesive layer 33 but also the electrophoretic layer 31 and The transparent substrate 14 is provided so as to cover the side surfaces 31c and 14c. The protective film 12 disposed on the display surface side is affixed to the folded portion 41 a of the adhesive support layer 41.

The electrophoretic display device 300 of the present embodiment does not have an element substrate and has an external connection structure. That is, since a voltage is applied to the electrophoretic layer 31 from the outside, it is preferable that the adhesive support layer 41 has conductivity. Thereby, voltage application to the electrophoretic layer 31 can be performed efficiently.
Further, the adhesive support layer 41 is configured to support the electrophoretic layer 31 instead of the element substrate.

  In the configuration of the present embodiment, the adhesive support layer 41 is provided from the bottom surface (the surface opposite to the display surface) to the side surface of the electrophoretic sheet 50, and is folded from the transparent substrate 14 side on the folded portion 41a. The protective film 12 is affixed. For this reason, a gap is hardly generated between the electrophoretic sheet 50 and the protective film 12, and the adhesiveness is high. In addition, since the adhesive support layer 41 and the protective film 12 having moisture resistance are disposed around the electrophoretic layer 31, the moisture resistance is improved and display deterioration is prevented for a long time. be able to.

  Note that the adhesive layer 33 of the electrophoretic sheet in each of the previous embodiments is omitted, and the adhesive support layer 41 is directly attached onto the electrophoretic layer 31 (a plurality of microcapsules) as shown in FIG. Also good. Thereby, thickness reduction of an electrophoresis apparatus can be achieved.

  As described above, the preferred embodiments according to the present invention have been described with reference to the accompanying drawings, but the present invention is not limited to the examples. It is obvious for those skilled in the art that various changes or modifications can be conceived within the scope of the technical idea described in the claims. It is understood that it belongs to.

  For example, as the protective film 12 provided on the display surface side of the electrophoresis panel 2, a notch 120 may be made in accordance with the shape of the electrophoresis panel 2 or the electrophoresis sheet 50 as shown in FIG. 6.

The structure of the present invention is not limited to an electrophoretic display or an electrophoretic sheet, but can also be used as an electronic paper display having a display holding property such as an electronic powder method and a structure having a high moisture-proof and narrow frame for a display sheet. .
Furthermore, the configuration of the present invention can be utilized as a structure for a liquid crystal display having a high moisture-proof and a narrow frame.

  Moreover, it is preferable that any one of the adhesive layer 11 and the protective film 13 has moisture resistance. Since either one of the adhesive layer 11 and the protective film 13 has moisture resistance, the moisture resistance on the element substrate 15 side is ensured even when the element substrate 15 is made of a material that does not have moisture resistance. be able to. Thereby, like the conventional structure, in order to ensure the sealing performance by the pair of protective films for sealing the electrophoretic panel 2, the sealing width of the sealing portion formed by laminating these films is not increased. However, sufficient moisture resistance for the electrophoretic layer 31 can be ensured without increasing the frame width. In addition, since either one of the adhesive layer 11 and the protective film 13 has moisture resistance, an inexpensive adhesive layer or protective film that does not have moisture resistance for the other can be used. Thereby, the cost concerning a structural member can be reduced.

(Electronics)
Next, the case where the electrophoresis apparatus (100, 200, 300) of the above embodiment is applied to an electronic device will be described.
FIG. 7 is a front view of the wrist watch 1000. The wrist watch 1000 includes a watch case 1002 and a pair of bands 1003 connected to the watch case 1002.
On the front surface of the watch case 1002, a display unit 1005, the second hand 1021, the minute hand 1022, and the hour hand 1023, which are the electro-optical devices of the above-described embodiments, are provided. On the side surface of the watch case 1002, a crown 1010 and an operation button 1011 are provided as operation elements. The crown 1010 is connected to a winding stem (not shown) provided inside the case, and is integrally provided with the winding stem so that it can be pushed and pulled in multiple stages (for example, two stages) and can be rotated. . The display unit 1005 can display a background image, a character string such as date and time, or a second hand, a minute hand, and an hour hand.

  FIG. 8 is a perspective view illustrating a configuration of the electronic paper 1100. An electronic paper 1100 includes the electro-optical device of the above embodiment in a display area 1101. The electronic paper 1100 has flexibility, and includes a main body 1102 formed of a rewritable sheet having the same texture and flexibility as conventional paper.

  FIG. 9 is a perspective view showing the configuration of the electronic notebook 1200. An electronic notebook 1200 is obtained by bundling a plurality of the electronic papers 1100 and sandwiching them between covers 1201. The cover 1201 includes display data input means (not shown) for inputting display data sent from an external device, for example. Thereby, according to the display data, the display content can be changed or updated while the electronic paper is bundled.

  According to the wristwatch 1000, the electronic paper 1100, and the electronic notebook 1200 described above, the electrophoretic device according to the present invention is employed, so that the electronic apparatus having a highly reliable display unit with excellent moisture resistance and durability. It becomes. In addition, since the electrophoretic display device having a narrow frame is provided, an electronic device including a display portion with good visibility is obtained.

  In addition, said electronic device illustrates the electronic device which concerns on this invention, Comprising: The technical scope of this invention is not limited. For example, the electrophoretic display device according to the present invention can be suitably used for a display portion of an electronic device such as a mobile phone or a portable audio device.

100, 200, 300 Electrophoretic display device, 11 adhesive layer, 11a folded portion, 2 protective film (first protective film), 12a peripheral portion, 13 protective film (second protective film), 14 transparent substrate, 15 elements Substrate, 15b outer surface, 15c side surface, 20 microcapsule, 23 protective film (second protective film), 25 element substrate, 30 transparent substrate, 31 electrophoretic layer, 31c side surface, 33 adhesive layer, 33c side surface, 35 pixel electrode , 40 pixels, 41 adhesive support layer, 41a folded portion, 50 electrophoretic sheet, 1000 wristwatch (electronic device), 1100 electronic paper (electronic device), 1200 electronic notebook (electronic device)

Claims (9)

A substrate,
A support layer disposed opposite to the substrate;
An electrophoretic layer disposed between the substrate and the support layer;
An adhesive layer disposed on a surface of the support layer opposite to the electrophoretic layer;
A first protective film disposed on the outer surface side of the substrate;
A second protective film that is disposed on the outer surface side of the adhesive layer and seals the electrophoretic layer by being bonded to the first protective film,
The adhesive layer is provided so as to wrap around at least the side surface of the support layer, and the first protective film or the second layer is provided on a folded portion of the adhesive layer that is folded so as to wrap around the side surface of the support layer. An electrophoretic display device having a protective film attached thereto. The said 1st protective film and the said 2nd protective film are affixed on the folding | returning part of the said contact bonding layer folded so that it might wrap around to the side surface of the said support layer. Electrophoretic display device.   The electrophoretic display device according to claim 1, wherein either one of the adhesive layer and the second protective film has moisture resistance. A transparent substrate;
An electrophoretic layer disposed on the transparent substrate;
An adhesive support layer disposed on a surface of the electrophoretic layer opposite to the transparent substrate;
A first protective film disposed on the outer surface side of the transparent substrate;
A second protective film which is disposed on the outer surface side of the adhesive support layer and seals the electrophoretic layer by being bonded to the first protective film,
The adhesive support layer is provided so as to go around at least the side surface of the electrophoretic layer, and the first protection is provided on a folded portion of the adhesive support layer folded so as to go around the side surface of the electrophoretic layer. An electrophoretic sheet having a film attached thereto. The electrophoretic sheet according to claim 4, wherein the adhesive support layer is provided in contact with the transparent substrate. The electrophoretic layer has a plurality of microcapsules,
The electrophoretic sheet according to claim 4 or 5, wherein the adhesive support layer is bonded onto the plurality of microcapsules. The electrophoretic sheet according to claim 4, wherein the adhesive support layer has moisture resistance. The electrophoresis sheet according to claim 4,
An electrophoretic display device comprising: a pair of protective films that cover the electrophoretic sheet and seal the electrophoretic sheet. An electronic apparatus comprising the electrophoretic display device according to claim 1.

Images